Hitting the Wall (Insulation)!

It’s been an intense few months for everyone in the UK (and now globally too…), and a lot has changed for me personally too. I’ve made a decision about “LittleEcoTerrace”, and I’m going to do my best to “finish the job” and see if we can make Superhome status. We already moved the house from a D to an A (CO2 via EPC) for ~10% of its value, but I know there are lots of things we can still do that might just be enough to push our CO2 saving to the 60 % required to get Superhome status.

A bit over a month ago, I passed my final exam (viva) on to become a Dr. of Chemistry, for which I focused on atmospheric chemistry motivated by Climate Change and Air-quality. A personal hero of mine is an American lady called Katherine Heyhoe (and she even liked one my of tweets once… *swoon*), who recently publicised a study showing climate scientists’ credibility is affected by their actions (insideclimatenews article). I strongly believe this, but I think it is more poignant that if even those who can start to understand the sheer scale of impacts climate is having don’t act… then who does?

There are some obvious things that we should be doing for our LittleEcoTerrace project, but we won’t as they should have been done earlier in the project if they were going to be done at all. One of these is extending our insulated floor through our 70s kitchen/bathroom extension, another is installing full mechanical heat recovery (MHR). There are some little ideas that might happen in the future too, like putting a light well in at the top of the stairs… But below are my loose plans for work on the house over the next bit. I am very open to any  suggestions or comments!

Phase 5 – Doing the bathroom

This is the most simple and standard bit of work I want to do. Our bathroom needs some love and most people end up doing this at some point. In our place it has been workable, but not great, since we moved in. We spruced it up a bit with some paint and added the active ventilation (see “Its draught to let hot air escape“). However the whole extension remains hard to heat due to large heats sinks of the floor and ceiling (which I want to tackle in Phase 7). As well as generic aesthetics, I will insulate the (metal) bath.

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bathroom on arrival… a few things have changed, but not much…

Currently the bath touches two external walls and un-insulated tile floor. It keeps its heat for a mere few minutes. So i intend to move it slightly away from the walls and put some insulation in the gap and around the bath. I want to replace the metal legs with plastic ones to insulate from the floor too. It’s been an aim ever since we arrived to one day have a proper hot bath!

Phase 6 – Insulating the two internal walls

Two of the large heat sinks are the two solid external walls of the old terrace. The simple and cheapest option would be to do external insulation, but we are rather fond of the traditional Victorian brickwork. Therefore we are looking at internal insulation, and one that doesn’t take that much space from the room. The one that we are often recommended is called SpaceTherm. It is a aerogel, like the insulation used by NASA on the Space Station, it is high performing and takes up little space but is quite expensive.

 

Phase 7 – Insulating the extension

The extension is a massive heat sink in the winter and overheats in the summer. It is very common and most extensions and badly thought out conservatories you see around will suffer from this. To sort this I’m looking into insulating the walls and ceiling. The floor also needs doing (currently just tile on scree), but I can’t do this without ripping out the kitchen that was put in only shortly before we arrived.

The simplest option would have been to put insulation atop of the flat roof, but as we have solar panels there (see blog post “To PV or not to PV“) it would be troublesome. I’m still looking into this and open to ideas. However, currently the winning idea is to attach kingspan inside to the ceiling of the extension. To make this happen I will have to be convinced that we won’t end up with/can avoid condensation.

I also am keen to have a go at doing external insulation, but as we already have the cavity wall insulated this would have less impact. making sure the (flat) roof covers the extra depth of wall might also pose some challenges.

The story before?

Just for completeness and to put the new work in context… here is a brief history of the work we’ve done so far ( inc. previous renovation and “eco-renovation” ). To summarise the changes to the original house to date i’ve clumped together the broad “phases”. Technically some of these overlap, or the timings are mixed between phases, but for the sake of this blog article I will pretend that I had more of plan…

Phase 0 – From the beginning… 

Many years after the original (~1899-1902) construction of the 2-up-2-down terrace, a 70s extension with was added to the back. This had no insulation. The house also went through a typical modernisation with electricity and central heating.

Phase 1 – Recent updates to house (up to ~5 years before we moved in)

A bit had been done to the house in recent years. Double glazed  windows ( not very good PVC )… and I am disappointed by this, especially as the house had a beautiful wooden and stained glass door about ~1 year prior to moving in… However costs limit the ability to replace these and this highlights the need to do things right first time with the large expenses. A new (modern, but non-condensing) boiler was fitted, which unfortunately died within 5 years. And a recently installed IKEA Kitchen. This is the point it was at when we moved in.

Phase 2 – Floor 

We dug up the whole downstairs floor to deal with a damp problem and added lots of insulation and a new solid wood floor at the same time. (described on blog post “Floored by insulation”).

Phase 3 – Ventilation/Insulation boost

The house was very leaky and poorly insulated. We boosted the insulation in the walls, roof, ceiling hatches, and installed bathroom active extractor at the same time as insulating up all vents (as described in blog post: “Its Draught to let Hot Air“)

Phase 4 – Added solar panels (PV)

We are very fond of these. They produce ~3.3MWh a year (record so far: 3.53 MWh), which approximately equals the gas from our 1st year in the house and the electricity from the year before we moved in (total: ~3.3 MWh). Nowadays we consume a very variable amount of electricity and gas,  depending many people are in house/usage/etc but generally it is a lot lower as we are using energy off the panels. (described on blog post: “To PV or not to PV“)

img_3359
Solar panels on the main roof

Phase 5 – Yard (Not yet complete!)

An underplayed part of sustainability is lifestyle change. It’s not that sexy, unlike fancy tech solutions but it can make a very large difference to a carbon footprint. We are most of the way through redoing the back yard to make it easy to be a base for cycling. So far this has been re-making the shed into a seat, building a bike shelter, and finally we aim to lay the Victorian quarry tiles we took up from inside the house (upcycle!).

Summary

I am not sure whether we will be able to make it to the 60 % Co2 saving requisite for being a Superhome with these savings. My approach to everything so far has been piecemeal and been a big learning journey. I am very keen to reduce the footprint and learn how to do a few things along the way. Whatever happens LittleEcoTerrace is definitely, in a plodding way,  moving towards being an “Aspiring Superhome”.

 

Links

Another track for work and holiday travel? ; Would a train work for your trip?

Trains won’t work for every journey and they don’t loop the world, even if the phenomenal cinematographic breakthrough “Snowpiercer” suggests they can (trailer linked here). However, they often could work. They are often cheaper with a bit of research, offer greater chances to see the places alongside the route (both out the window and on stops), more comfortable (leg room, ability to walk around etc), less stressful (no “check-ins” as such, lots of luggage allowance etc) and give substantially lower CO2 emissions. A huge plus for my partner and I is that, unlike driving, no one gets annoyed when you read a good book in transit…

Some people like flying. I have always had childish glee watching the wings every time I have taken off. However, I have always found planes uncomfortable (especially for longer trips), stressful, and find the irony of being an atmospheric scientist and flying often rather too poignant. Without spending too much time on the emissions argument, I would like instead to put time to the argument that trains could be an upgrade to many trips in terms of comfort, experience and holiday time.

  • Logistics & planning

Train travel logistics can be less than obvious to those who do not often use it, and even those who do. A good example of this is my partner and I’s trip to the Balkans by train, in which by just using the Euro-star site for our tickets London to Munich lead to addition £50 charge (We should have used SNCB after Brussels as soon as we were on a line operated by them or LOCO2). I have almost ubiquitously found that buying separate tickets from the country’s provider leads to the best prices, the answer is always to check a least a few providers website’s for the same service and the general sites like LOCO2.

However, with that said there are some phenomenal sites and blogs from people who know the score with trains. My favourite (and the favorite of many people!) is a site called The Man In Seat 61. I’ve tried to list (at the bottom) a few that we’ve found useful over the years, and will happily add suggestions.

  • Work travel

Some professions end up travelling a lot. In academia, I’ve been sent to America once a year for the last 3 years which has rather ratcheted up my travel carbon footprint. I admit that, obviously, I flew across the Atlantic. But the USA actually does have a lot of good train routes (and buses too…) if you are travelling within the states and are willing to spend a bit more time on the travel. My decision to catch the train from Boston Massachusetts to San Francisco made me the subject of much amusement from my colleagues (especially the American ones!). Unfortunately the USA setup for train travel means they travel at a tiny fraction of the speed of their European counterparts (so the direct version of my trip would take ~3.5 days).  However, things like free WiFi on buses and trains puts us to shame in the UK. To do this trip you need to take holiday (only ~1 day if you included the weekend), but I really have to emphasis how much of a wonder doing the trip was. I’ve put a few photos of the trip below, however although the sights are incredible shots through train windows (or photography in general) has never been my strong suit.

 

Apart from the mind-blowing sight of a wolf in the wild whilst eating a (well priced) 3 course dinner in the dinning cart, just the scenery was enough. As Brit who has only been to the USA because of my PhD, I had not seen the USA and its vast and glorious landscapes. The university I was based at in Cambridge Massachusetts was surrounded by fantastic independent shops and the office I shared was actually with scientists from Switzerland and Denmark, suffice it to say I doubt this was representative of the USA as a whole (and after my train trip I know it wasn’t). Neither in fact were the 10 days I spent in San Francisco at a conference following the train trip. I cannot recommend the trip enough if you need to get from Denver to San Francisco (other USA summarised routes here). I guess the point I am making is that the train trip was a great way to see some of “real” America.

There is often an argument about driving being cheaper or easy. Sometimes this is valid in the UK due high rail prices, but often not. Certainly in academia when a lot of trips (e.g. conferences, talks etc) are organized in advance, advance singles are a good match.  Also, in the UK it is often cheaper and quicker to get to close Europe by train (e.g. Paris in 2h20, Brussels in 2h21, Lille in 1h22 etc…) by buying return fares not that far in advance. For instance prices to Paris from London start from £29. On our latest train trip, which was a holiday, we actually arrived into Brussels casually for 9am (UK time). I can’t easily describe my huge endearment to the Eurostar. It is both the big things (like how smooth the logistics work) and little things like dated (but in good nick) upholstery that is enough to transport you back in time, and really make you feel like you holiday or trip has started!

I am actually right now excitedly researching travel for my next work trip (to travel the weekend before) as I have recently been invited to give a talk at Copenhagen university (my 1st invited talk!). However, it is unfortunately a little complicated due to the recent cancellation of the Danish ferry to the UK. It looks like it with be as footpassenger on the ferry to Gothenburg, followed by a train from from Gothenburg to Copenhagen.

  • And holidays too? (and combining with boats…)

By combination with a through deals like “rail and sail” (Which includes any east Anglian train station to any Dutch station – like Flussinger, which is a few Euro ferry and few minute cycle from Belgium), there are lot more travel options (e.g. Bilbao… ). The “rail and sail” option used to be closer to £20 each way a while back, but at £34 from your door it is frankly still a steal. Just think about cutting out all those airport lounges, stressful queues, expensive transfers (ad nauseam…) and just boarding your local train station with a bag and a book. The standard arrival into the centre of cities is huge boon for holidays and work travel (again saving the transfer time,  which with many budget airline airports is frankly ridiculous, and costs. )

We’ve also done quick trips from York to the south France (Eurostar to Avignon, cycled the rest). The similarity times from York to London, York to Edinburgh, and London to Paris really raise questions why anyone would fly UK to Paris. I am so surprised when I frequency here of people doing this, especially from York.

The big eye opener for us recently though, was getting the to Balkans by train. It was a painless trip to Munich in fancy new trains (with a pretty LED speedometer casually reminding us we were at ~250 km/h or faster!), with a lovely evening walking round the city and eating Bavarian food with a friend. Then just another simple trip to Ljubljana (which can be done by bus or train).

The kicker? the cost out was less (£118.75 pp + 1xtransfer, London=> Ljubljana) than the flight back (£133.90 + 2xtransfer, Split=>London). Admitted this was on BA, and took substantially less time. I could have got both the trains tickets and the airfare for slightly less with more advance planning, and arguably we could have taken a budget airline (and paid the extra costs for luggage etc). But there is only so much time…

 

  • Ending thoughts?

There are lots of people who are fanatical about trains, but we just use them to get from A to B and enjoy our longer trips in them. I would strongly argue that most of the time When comparing costs of flying and trains, all costs and times need to included (baggage, transfers, parking). These considerations obviously apply for smaller trips too, and there are of course the arguments of time, experience, and carbon footprints.

Although we have only recently had our eyes opened to how cheap and easy it is to get to the Balkans via train, we have been using them for a while now and continue actively choosing them in the future. As firefly’s Shepherd Book says, sometimes “how you get there is the worthier part”…

Links:

  • The Man in Seat 61 –  A fantastic go to site for day dreaming about trips all over the world and nailing down exact details. It is a brilliant at pointing where the most update information will be found too
  • LOCO2 – A booking website for trips, which I have used and often found best prices on
  • “Rail and Sail” to holland – A fantastic deal for getting to the continent by ferry and train. Any station in East-Anglia to any in the Netherlands from £34 each way as an adult foot passenger (it used to be closer to £20, but it is still pretty good!), and a bit more from farther afield. There are Ferries to Ireland too from Holyhead, Liverpool, fishguard, and Cairnryan…
  • Eurostar – They have a good website, and lots of good deals to get to the continent.
  • International train travel summary from National Rail (This should stay up-to date…)
  • Greyhound buses (there are often other good local services too) – A cheap, and in my experience very pleasant way to get around the US (contra to the general impression and what a lot of Americans who haven’t used the service will tell you!)
  • Eurolines – A (very) cheap alternative, but less comfortable alternative to trains.

Disclaimer: I am not a travel agent and I have tried to be as accurate as possible. However information will change and I would advise double-checking any information before acting on it.

Pining for a warm floor; Installing parquet in 70s flat

So this is the first blog on “LittleEcoFlat” our 2nd renovation project we’re trying to make as “Eco” as possible. The background is that my partner got a job in the “Big smoke”, which allowed her to bring together her professional life (mechanical design engineering) and love of sustainability to work in bike design in London. Following 1 year of renting a sofa to crash on (from a rather lovely lady), we sought something a little more permanent. Searching for a flat was fun but as I was working in the US for my PhD the time, it was a pretty challenging time. Regardless we managed to find a little place needing some love and slowly started turning it into a home by the only way we know how, flooring 1st! (Although this might be a floored approach… )

The Carpet

The walls and carpets all had a brown tinge only really describable as “nicotine coloured”  (My partner actually came in in rashes from touching the carpet!). The carpets had to go. It would be great to have found a way to re-use them, but unfortunate the only option (I’m very interested in anyone has found alternate options) was to take them to to tip. As they rested directly on concrete they weren’t warm either and we were determined to have a warm floor so we started looking at alternatives and how to add some warmth. Interestingly, in a lot of houses there are often pretty floorboards unearth the carpets. If the house has been insulated to stay warm they can be rather pleasant underfoot, and just need sanding back (as is the case in “LittleEcoTerrace”). As this wasn’t the case in “LittleEcoFlat” we had to look for alternatives…

The Floor

To prepare the flat to get a new floor we got right in by pulling up the old carpet. After the carpet the vinyl tiles underneath had to come up, as many were broken/missing, to give a flat starting surface. This required a lot more effort than we expected, but did allow for a time playing with some of the more destructive DIY kit… We both have a favourite crow bar now.

Local trades

We were never going to do lay the parquet ourselves. We had already learned (from mistakes) that there are certain tasks best left to professionals and have nothing against support local trades. So after finding somewhere local to buy reclaimed floor boards (and settling on Pitch Pine) and someone who do the skilful part, work got started!

 Joseph's incredible sanding machine...
Joseph’s incredible sanding machine…

Seeing Joseph lay the parquet was impressive, like a huge game of herringbone Tetris. Then the oily and burnt reclamed boards were sanded. Once the sanding started the transformation was incredible…

The final floor was then given a protective coat which brought the red of the Pitch Pine out, and hopefully will give it a more hard wearing surface.

This project had opened our eyes to huge options available from reclamation yards and second hand shops, and the sheer number of these. There has been a lot of coverage of re-use and upcycling recent on the TV (e.g. Kevin McCloud’s Man made shed where he made a hottub out of a old aircraft turbine) and i’m always interested new uses of materials that for no good reason now classed as waste (e.g. this old radiator turned into a seat by the BareFootWelder… we have 3 of these and are seriously considering it)

 

We acknowledge that “off-the-shelf” engineered boards would have essentially done the job too. However I find the idea very appealing that for decades and decades to come the floor could just be re-sanded to restore it, then there is the “eco” side of re-use of wood.  They were many sustainable options ( e.g. FSC Cork, Bamboo, upcycled cutlet glass etc ), but for indoor air-quality reasons the choice for us could not be “standard” carpet that is ubiquitous everywhere.

 

After sorting the floor we have been on the search for second hand furniture and found where is good in west London, which I’ll blog about another time. It did take a lot more effort to prepare the floor than we anticipated (which you could say, wasn’t a walk in the parquet),  but we are very happy the end result and how warm the floor feels underfoot.

 

Links

  • Joesph Dohf – The guy who did all the hard work on laying the parquet and deserves the vast majority of the credit
  • Heritage reclamation – Where we bought the parquet from

 

Hello from “LittleEcoTerrace” & also from “LittleEcoFlat”…

So this is a short little update blog on blogs posts to come. It’s been busy times for me over the last bit and will continue to be for a few months more… but I’ve still been doing lots of “Eco” projects and have several draft blogs i’ll be aiming to get posting once work calms down a bit. I guess the big news is that we’ve started our 2nd eco-renovation project. I’m still doing work on “LittleEcoTerrace” and it will continue to be my main base for the foreseeable future, but now there’s a “LittleEcoFlat” too… The reason for this is that my partner got an opportunity to combine her work (mechanical design engineering) with her love of bikes (and sustainability), but the job required a move to London…

So we did it again, we found the cheapest place we could that fitted us generally and needed a some TLC. I didn’t really think we’d be able to do that many “Eco” things in a flat, as we can’t change a lot of the energy systems/building fabric etc. However, it already has shared community heating and we are finding that there are things like sourcing reclaimed flooring, starting a high-rise allotment, getting involved in community projects etc… So although I’m not going to be able to upgrade to place to a SuperHome, I still think we should be able to do quite a bit and continuing working on trying to have lower carbon footprints. Watch this space…

 

 

As well as renovating “LittleEcoFlat” there are goings on in York for us too, with York Open Eco Homes (YOEH) running again this year and us be taking part on May 14th (the event is also happening on the 21st). There is a training event coming up on the 7th if you might be interested in taking part or would like to hear from the organisers and those involved last year (summary teaser video here). Aswell the few bits I have done (like building bike storage etc), I’ve been day-dreaming (and researching) about finishing up some jobs that money or time has put on the backburner. These include tripling installation in the main roof (As well explained by @PostCarbonLife’s youtube video) and choices for internal solid wall insulation

 

Anyway, I hope you are having a nice start to 2016 and hopefully i’ll have time to post project updates soon !

LittleEcoTerrace/LittleEcoFlat

“Eco Show & Tell” – YOEH II

Back in December, York Open Eco Homes (YOEH) and St Nicks hosted an “Eco Show & Tell” where anyone was encouraged to bring items costing less than £50 that had helped make their homes cosier to live in, cheaper to run, and/or more sustainable. The event was a casual evening where successes of smalls items (<£50) were shared. Engaging demonstrations and discussions of how to use and install the items were given, including a energy use of different lights from using an energy monitoring plug showing hugely differing energy use of different types of lights and we even had a lovely cake made in a low energy/slow cooker.

This blog is just a summary of items presented at the event, which you can also find collected on a pinterest board. This will continue to be added to, and all credit and thanks go to everyone who came and brought them along. Please do say if you think of anything that has been missed or you think should be included. Hopefully this list will be of interest to others – maybe some of these items will make your home cosier, cheaper to run, or more sustainable?

 

This event was the 2nd in YOEH’s series of events, following the inaugural event of a talk on “Building Low Energy, Healthy Homes” from local architects (Native Architects). The next event will be a session in April preparing for this year’s Open Homes event in York (on 14th and 21st May), with more information to follow in the near future…

  • Chimney Sheep

This item was 1st of the night, and several people including myself expressed interest in trying it for ourselves. The cost is ~£20-35, it is made 100% Herdwick wool and available from ChimneySheep.co.uk. There is lot of information on the website inc. energy loss and money saving calculations or air escaping up chimneys. One obvious advantage over a chimney balloon (see below) is its natural material and thus breathable composition which may help prevent potential build-up of moisture

Chimney Sheep! Cost: ~£20-35 ( depending on size )
Chimney Sheep! Cost: ~£20-35 ( depending on size )
  • Door sausage

A  way to keep out drafts that many people have used for years. The one presented was bought cheaply (~£6), but it is also possible to make them. Many DIY guides exist online ( e.g. OvoEnergy) and people make different and amusing shapes from snake to sausage dogs.

Coincidentally I was actually given a rather impressive and pretty “Fantastic Fox” one for Xmas that my family had made following a Rowan pattern.

 

  • Slow cooker

This item may have been many people’s favourite of the night as a delicious apple cake made in it that day was brought and shared. Slow cookers have a low energy consumption and require a different approach to cooking but with a bit of planning can make almost any dish. Not many people use them for baking but the tasty cake proved that it’s possible too. They are widely available and costs can vary, with ~£25 being typical.

Slow cooker - Cost: ~£25
Slow cooker – Cost: ~£25
  • Plug socket energy meter

This item puts an exact number on energy consumption of appliances at a point or over a period of time. We were given a demonstration of different power requirements of LED, compact fluorescent, and traditional electric lighting which varied widely. It costs ~£10 and is available from Maplins. Interestingly the person who presented the item highlighted that many items he had tested gave unexpectedly high or low readings during use – manufacturers’ labels are not always true to actual running costs.

FYI Another YOEH host has also put together a guide to choosing the right LED lighting, which is well worth a read if you’re planning to buy some or think your existing lights are too dull or bright.

Energy Monitor How much? £10 Where to Buy: maplan (link) Key info: More Info here? An energy meter that fits a 13amp plug - allows comparison of appliance settings eg washing machine.
Energy Monitor How much? £10 Where to Buy: maplan (link) Key info: More Info here? An energy meter that fits a 13amp plug – allows comparison of appliance settings eg washing machine.

 

  • Keyhole cover

A simple and cheap way of avoiding loss of hot air through key holes (a surprisingly big consideration in Passivhauses). It cost ~£3-5 and is available from lots of hardware stores (e.g. Barnitts in York).

Key Hole Cover How much? £3-5 Where to Buy: hardware stores ( e.g. barnitts )
Key Hole Cover How much? £3-5 Where to Buy: hardware stores ( e.g. barnitts )

 

  • Curtains/Stopping draughts

A cheap (approx.. £40 for curtains + £10 for pole) option to deal with draughts around doors (and windows). I have a similar setup to the one presented in our house, with a thick curtain over the front door (photo below). As with a lot of terraces in York, the front door leads directly into the living room, so as well as the noise/heat insulation we find it actually improves the aesthetics of the room.

Thick Curtains
Thick Curtains

 

  • Chimney Balloon

Another option for stopping loss of hot air from unused chimneys. It differs from the chimney sheep in that it is made of plastic. I have had one for a while now and think it does the job nicely. It cost ~£25 and is available from lots of places, including ecotopia.

 

Chimney Balloon - How much? = £25 - Where to Buy: http://www.chimneyballoon.co.uk/
Chimney Balloon – How much? = £25 – Where to Buy: http://www.chimneyballoon.co.uk/

 

  • Electric Oil Heater

This is an item I brought, and it may be counter intuitive. Since our house has solar panels, any extra electricity from the panels can be directed to heat the house through this electric heater. Obviously cost/CO2 savings would differ if power was used directly from grid.

 Oil Heater - How much? £50 - Where to Buy: Widely available
Oil Heater – How much? £50 – Where to Buy: Widely available
  • Energy Monitor (OWL)

For ~£50 or less it is possible to monitor your electric consumption in real time with an “owl“. This little device works by placing a magnet around the mains cable into the house to measure the electricity flow. This item gives real time and cumulative whole house energy consumption in money and energy terms, as well as useful info like temperature.

Energy Monitor - Cost: £30 "Owl Micro+ Wireless Energy Monitor"
Energy Monitor – Cost: £30 “Owl Micro+ Wireless Energy Monitor”
  • Thermostatic timers

The first of these just plugs into any socket (and costs only ~£17) and allows for temperature controlled settings of anything plugged through it. The  timer is used in a flat with electric radiators, which previously had to be set manually. The second example was wired in to control a radiator without a plug socket.

 

 

  • Immersion heater timer

Energy can be saved by setting a hot water tank immersion heater on timer rather than using a manual on/off control.This “Time guard NTT07 ” cost: ~£35.

Immersion heater timer How much? = £34.40 Where to Buy: = www.timeguard.com/
Immersion heater timer How much? = £34.40 Where to Buy: = www.timeguard.com/
  • Trickle Vents

Cheap (~£7) but require careful work aligning the vents in order to prevent damage to windows.  It was made clear during the presentation that technical help to install these is recommended if in any doubt. Available from hardware/trade stores (e.g. YorkTradeWindows).

 

Trickle Vent How much? = £7 Where to Buy: YorkTradeWindows
Trickle Vent How much? = £7 Where to Buy: YorkTradeWindows

The event was a lot fun and I think everyone who attended got exposed to something new. Hearing about other peoples’ experiences with items, including some that I certainly have had less experience of, was a learning experience for me. Do feel free to get in contact if you want more info and I will try and connect you up with information or with the person who presented the item. I will keep adding to the pinterest board (below) and, like other people, am interested in hearing about other cheap but effective items. Please feel free to send/pin suggestions.

 

 

Further links

DISCLAIMER:

These items were presented by individuals and shared here for reference. By inclusion within this YOEH does not recommend use/installation of specific items. Decisions on energy saving are home specific, and if in any doubt please consult relevant professionals/tradesmen.

4 steps to solar panels – a quick test to see if PVs could work on your roof

Over the last few weeks, I have talked to quite a few people about whether panels for electricity from solar ( photovoltaic panels (PV) ) are plausible for their roof. A lot of this is due to the government consulting on cutting support for PVs from January 1st (by up to 87%), meaning the financial payback on installing panels would typically increase from ~10 to 27 years. I’ve blogged before about when we when through the steps of getting our install together (to PV or not to PV), but I thought I would throw together a more general simple step-by-step…

If you live in a flat, the roof is one you do not solely own, or the install is on the larger side, some further steps are needed ( e.g. structural survey, certificate of easement…) however the general steps below are effectively the same.

      1. Work out a few details about your roof area and angle.

You will need to know roof area, roof angle, what angle it faces, how much shading it has, and whether the building has an energy performance above the minimal criteria (an EPC of D or above).

You can calculate the approximate area from eye or just use satellite photos. I tend to use Google maps through an app on a website like comparemysolar. Using this app you just place pins on the outline of the roof to get an approximate area. Google maps also gives you an compass orientation. As for angle, I would say it should be possible to get a estimate just from looking at the roof and comparing against a few examples. Then check for shading (e.g. chimney pots, neighbours roofs, trees…) and estimate what % of day you think the roof is shaded (another approach would just to check the roof at several times of day, but bearing mind this will change a lot by season). To check an the energy performance of the house according to its EPC certificate, and you don’t know it off hand, you can quickly check it on this website. If you do decide to get quotes, then all these estimates will be refined then anyway.

( e.g.  20 square meters, 30 degrees, south facing, no shading, EPC=D,  and in York  )

      2. Estimate the rating of the PV install

There are lots of different panels of differing shapes, sizes, capacity and performance around. Choosing panels for the install may be easiest once you have quotes. I would recommend two sets of calculations, one for a lower capacity (e.g. ~100 W/sq m & cheaper) set of panels and one for higher capacity set of panels (~200 W/ sq m) . To get the peak output ( rating ) of the install just multiply the panel capacity by the area.

( e.g.  20 square metres * 200 W/square metres =  4000 W  )

      3. Use some apps to estimate the output and payback of the PV install

We can now just plug the numbers from steps 1 & 2 to one of many online apps that use past solar data to predict how the panels would perform.  There are lots of apps to check whether PV is worthwhile and they give give a variety of different information from just the basic payback, to yearly/monthly break downs of energy production, and ones with lots of technical gory detail. I would personally recommend getting a broad overview from the Energy Saving Trust (EST solar calculator) and the Centre for Alternative Technology (CAT solar calculator, Caution: the monetary values were out of date when I last checked so just use for solar). If you are interested in more detail then the Joint Research Centre (JRC solar calculator) provides a lot more technical background.

The payback is made up of payments for generated clean renewable every (feed-in-tariffs or FITs), electricity savings (from use of elecrcity on site), and export tariffs (price paid per unit exported to the gird for someone else to use). The is more detail on this here and this will be broken down by the apps also. I understand that Installs for a typical residential install are generally between £4-6.5k at present.

( e.g. estimated to generate ~3300 kWh/year and have a payback of 9 years )

     4. Get a few quotes

There is a great list of recommended installers (need to be MCS certified) and a list of good questions to ask on the YouGen site. I also used the quote service from EcoExperts who quickly got us 3 quotes for comparison. The industry has taken a big shock from the recent government proposals to cut the fit in tariff and a lot of people may being trying to get installs before the expected changes to the tariff so it could be quite busy at the moment.

Once you have your quotes you can choose obviously between suppliers/installers, but also the capacity/spec of your install…. and whether you want to go ahead with it. The installs typically take a day for a 4kW domestic install and then the install will need to be registered via the installer through the government’s micro generation scheme (MCS), which installers tend to help with or just do for you.

Our installation was done whilst we were away on holiday; it was done quickly and without disruption.

( e.g.  Ecoexpert say from £3950 for a 4kW install. – Ours cost a little over £6k, but was rather technical and high spec for two years ago )

Links

 

“Show & Tell” of items (<£50) to make homes cosier, cheaper to run, or more sustainable + YOEH's inaugural talk

First things first: Thanks to Native Architects for giving a great talk last month as the inaugural event of the York Open Eco Homes series (YOEH). It was a insightful talk, followed by a Q&A session with lots of good questions and discussions. Our next event will be a “show & tell” session where anyone is welcome to come along and talk about a item for less than <£50 that has made their home cosier, cheaper to  run, or more sustainable.

Building Low Energy, Healthy Homes –  A talk from Native Architect’s for YOEH’s inaugural event

Sally from Native Architects gave a talk with insight into successful eco building projects from renovation to new build. There was a lot of discussion on use and choice of materials. The highlight for me and possibly others in the room, was hearing about eco-building for a bottom up perspective that few people get the opportunity to do. There were many interesting digressions prompted by audience questions including sally highlighting historical lessons from eco-architecture ( for instance cold bridging, even evident within St Nicks’ environment centre). Having samples of low energy construction materials (such as Pavatherm and Pavadentro) made the evening a hands on experience!

Topics covered included net CO2 emissions per kg of material. With a nice graph on one of the slides showing how emissions generally led to materials being ordered (in emissions terms): “natural” ( with strawbales etc being negative )  < ceramic < synthetic (e.g. plastics) < metal. The audience was also shown spider charts highlighting how multiple characteristics of a materials should considered ( e.g. breath-ability, thermal conductivity and density) to find the right materials or fairer compare multiple materials. The role of influencers on a project or on product choice was also mentioned ( e.g. salesman, contractors and consumers).

Lots of time was given to successful strawbale projects Native Architects had undertaken (e.g. Bodner House), and lime plastering (including some fun photos of a workshop for stakeholders). The challenges for choosing bio-based construction also were discussed. Namely high profile mistakes, poor installation, lack of individual research into building materials, industry inertia, certification processes (e.g. BBA) and of course cost.

The talk was well received, with good questions throughout. The Q&A session was vibrant with lots of questions on approach and materials. YOEH thank Sally for giving a such a fascinating and insightful talk.

 

“Show & Tell” – YOEH’s next event.

Simply put, there are lot of cheap actions that can be done to make our homes cosier, cheaper to run and more sustainable. However, some of them work better than others and its often experience of lesson learned that we work this out. This is therefore a opportunity for people to share cheap solutions that have worked and maybe could work for someone else. Some ideas could be chimney balloons, compact water butts, energy monitors, small insulation works, etc…  I am looking forward to hearing about everyone’s items.

I am continuing being told being eco is expensive, which I find bizarre as a lot of the measure I and other York Open Eco Homes participants have done are cheap or they have saved money by doing them (sometimes alot!).

This is event is open and hopefully will allow everyone present to learn from each other. I just ask that you please message me in advance by email(littleecoterrace[at]gmail.com)/twitter etc if you would take part… Personally, I would love to do a talk on using open source motoring (e.g. openenergymonitor), but this is more around to ~£150 so will have to wait for another event. Instead I will talk about my chimney balloon and how to install it. Other items people have volunteered to talk about so far include: draught curtains, a competing “all natural” chimney “sheep”, and an upcycled wood cutter.

There are speakers and ideas in the pipeline for future YOEH events, please do contact me if you have any ideas for speakers or events you might be interested in.  I look forward to seeing what people bring, and I hope you can make it!

Further links

Post Green Open Homes/ York Open Eco Homes (YOEH), and where to now…

The York Open Eco Homes (YOEH) event (part of the national Green Open Home network) was popular, and hopefully has helped many people think of things that they can do to make their homes cosier, cheaper to run and “greener”. It was several months ago now but we’re spinning out a cool quarterly series of talks and workshops from it starting with talk from a local architects (Native Architects) on building low energy healthy homes. It should be a good evening from a firm that has delivered lower energy footprint schools, village halls, and artist studios to name a few.

As for us, we enjoyed being a host home and I remain staggered by the feedback and attendance. We did not expect over 40 people, the level of interest in our project and certainly not people arriving before the allotted time (teaches us to enthusiastically put the balloons out early!). It was exciting to see so many people thinking about trying to do small measures and being interested in the larger choices. Over 300 people attended the event in York and over 40 popped by by our place. There was a lot of feedback from people that were going to try some the ideas they’d seen on their own house/flat/rental. On top of that the prize of the event, to encourage return of feedback, was a whole house energy audit (worth £250!) kindly donated by Yorkshire Energy Partnership (YEP). Hopefully has helped the lady who won it start saving money

Who came? What did people ask? Or want to see? FAQs?

The event was attended by a real mix of people including: families who’d been living somewhere for a while, young couples about to buy, people in rental houses and flats, and people already considering a renovation project.

We put a lot of love into our ecorenovation & it’s a always joy when people who are also frustrated by how under performing houses typically are in the UK  are starting to explore the options to circumvent waste in energy and money. The main questions were first about the cookies then split by major and minor changes. Often people were interested in things I’ve done little blog articles on before including the floor insulation, chimney balloon, draught proofing, lifestyle, PV panels, and energy monitoring.

FAQs – Photovoltaic panel (PVs)

One of the most common phrases about PVs we heard was that people had “… seen them about, but not thought about putting them on my roof…”. A lot of questions were about cost. Generically when we got ours installed the typical quote for a stardard single roof  was £4k for 4kW (which is still often advertised, e.g. by ecoexperts) with prices increasing from that point. I asked the local company (Solarwall) for the current price range for a low and high end 4kW installation and they said £5.5-6k, which is inline with quotes we got a while back.

As i’ve blog about before, our panels are great and are producing more that we consume in electricity terms and even managed in energy terms last year according to our energy provider’s estimates.

 

FAQs – Energy monitoring

I like data. Graphs, pretty graphics, and anything that conveys information better that words ever could. I was so happy when the guys @openenergymonitor managed to get an updated version of their open source energy monitoring system (EmonPi) to me prior to the event even though it had only just finished kickstartiing. I had previously made the system (EmonTx) for ~£100 + (~£50 extras) and made it during an evening in.

Since building my original system, I’ve become aware of housing groups etc buying sensors systems in excess of £2-3k. This is upsetting. I use open source humidity and temperature monitors (EmonTH), that cost me ~£30. These give me a heads up into how the house is doing in energy terms and whether I need to be worried about damp issues.

 

 

 

FAQs – Lifestyle

There were a lot of questions about lifestyle and about the effort involved in “going green”.

Transport was a particular question point as people were interested in how we managed without a car. The answer to that is really we have tens of vehicles, including vans, electrics, hybrid and along with the usual set from citycarclub. Bicycles are our main transport and we use trains often too.

One biggest messages I tried to get across was that the simplest wins are often through changing little things so that the “green” choice is easier. I think a good example of this is recycling. I have lived places not long ago where throwing the majority of your waste into a hole in the ground is the only option (north Manchester, 2012) and had to make extra effort to not be wasteful. It shouldn’t be that way. For the vast majority of things that come through our homes, it is energetically worth while to recycle (e.g. glass, paper, most plastic, tetrapak… etc ). Food waste can be converted to energy or at least food and pretty plants through composting (community composting can exist for the many of us without gardens ) or anaerobic digestion to create energy with an end product of fertiliser.

 

 

FAQs – Other cheap and big things you did 

A large amount of energy and money saving is possible from cheap tech. e.g.

 

Some other larger changes

 

 

“Renewable” Cookies

For a bit of fun we thought we’d make 3D printed cookie cutters for the event, which raised a surprising about of interest. For if anyone else wanted to give them a try we put them up on thingiverse where they have garnered (as of August 2015) ~300 views and ~60 downloads! I’d love to see photos of anyone else’s 3D print of them…

 

Conflict of interest?

Since posting on micro-scale renewable investing and our PV install two companies I recommended have started doing “kick backs” (Trillion Fund & OnePlanetSolar). Since I recommended them prior to this happening, it is entirely reasonable to say my endorsements are uneffected. To gain a “kick back” people would have to state it was littleecoterrace that recommended them, and in the case of Trillion Fund this would be £50 each. Trillion Fund & OnePlanetSolar are both incredible companies and I stand by my recommendations and leave up to you whether you want to say littleecoterrace is who suggested them to you. We’re more interested in seeing the propagation of renewables so any money we do receive through this, we shall donate to an environmental charity.

 

Where from here? An event next year?

The event was a massive event on numbers as talked about by the organisers (St Nick’spress release. As for us, we would happily get involved again and it looks like I might hopefully be more involved next year. I would sort out some more demos of how the tech works we have used works, and hopefully finished outstanding tasks (like relaying the yard with the tiles we took up).

The enthusiasm of hosts has lead to a spin out quarterly series of open talks and workshops in York for people interested in make their homes cheaper to run, more energy effecient and sustainable. The inaugural talk will be from Native Architects at the environment centre (St Nicks). They have been involved in lots of cool projects aswell as being part of a fantastic proposal to tackle the affordable housing crisis in York by creating a co-housing group (YorSpace) within York Central.

As for non Yorkshire people, in the UK there is a rolling calendar of GreenOpenHome and SuperHome (>60 % CO2 saving) events. So, chances are there will be an open home nearby at some point to see what people have done, what worked and didn’t, & maybe what might work for you.

As for me, I’ve been very busy over the last few weeks so I’ve not been posting blogs. I’ve got drafts on eco product shopping, energy and retrofitting events so I’ll be aiming to post those back towards my original once a month aim…

 

Links

  • Green Open Homes – National organisation leading events that showcase a variety of energy saving improvements in homes. Local events are led by local groups and individual houses are hosted by the people who live in them. The initiative is funded by DECC
  • Super Homes – a network of houses that have achieved at least 60% carbon emissions savings and willing to open their doors to show you how they did it
  • Native Architects – Local architects firm talking at St nicks for a joint event which is that the YOEC inaugural event “Building Low Energy, Healthy Homes
  • Solarwall – Local one stop shop for home eco stuff.

 

York Green Open Homes – Living in a “Eco” home

We’re part of York Green open homes this weekend! If you are about York, come see what “eco” measures people have done! These include from a “Passivhaus” under-construcion (more about passivhaus), 1960s council house, a 1930s semi, detached, bungalow, and many more. Green Open Homes is a national project and they have a even have a nice video intro of the project.

Frankly, flattered doesn’t quite cut it to explain how we feel about being asked to do Open Eco Homes. Our project is a lot smaller budget than a lot of projects you hear about. For the event, we’ll be showing how we reached our goal to take a thoroughly normal terrace home in York from a “D” to “A” grade (EPC) eco home for less that 10% of the value. We’ll show how we achieved that and also made our house a net exporter of electricity with low bills. There’s another aim we always had but didn’t mention often; we wanted to make sure it was still a “normal” home. One that we can live in comfortably, and be eco without having to drastically change anything about our lifestyle.

 

As the hosts (@StNicksFields) say: “Find out how to turn your house into a comfortable and efficient home from people who have done it!”

Us: We’re Not Hippies, Honest

Both of us have long been interested in the environment and technology that reduces our impact. That’s based on our concern about climate change. But being a scientist and an engineer, we’ve often noticed that we’re much more interested in the cold evidence than the sentimental stuff. You’re more likely to find us obsessing over doing our recycling correctly than getting upset about pandas.

 

This means we sometimes choose different paths to an eco lifestyle. A good example is being vegetarian – we’re not. A lot of our friends in the eco world are; some for ethical reasons, some for environmental impact. We like eating meat now and then so we’d find giving it up unenjoyable; instead we eat meat infrequently, and eat less of the most environmentally detrimental meats. Using the information we have, we can reduce our impact without having to change our underlying habits and lifestyle.

 

So this means we need an eco home where:
  1. we’re happy every change made had a rational, evidence-based argument to support it.
  2. little day-to-day input or behaviour change is needed from us.

Most of our blog topics have been info-heavy and focused on the numbers. This one catches us in a thoughtful mood as our Eco Open Homes weekend approaches and we start talking about what we’ll tell our visitors about what it feels like to live in a home like this.

Our “Eco” Home

 

The goal of this project was to convert the cheapest house we could get in York to a “A” grade (EPC) eco home for less that 10% of the value. We essentially achieved this. Due to cosmetic choices and additional non eco measures (like our FSC oak floor + relaying backyard with our reclaimed victorian tiles) it may end up being closer to 15%.

 

The project has involved some big changes such as installing solar power panels, insulating the floor and dealing with damp problems, and some smaller changes of insulating and draft proofing the house and installing a chimney pillow.

 

What’s it like to use electricity in an eco home?
 

Well, in 2014 we produced 3.4 MWh and in 2013 we used 2.6 MWh. So overall, we’re producing 130% of what we need. On the face of it, we’re golden. If we assume out consumption is constant and you look into it a bit further, it’s more likely that a portion of that 2.6 MWh came from the grid when it wasn’t sunny. So we sold spare units at sunny times, and bought National Grid units at others.

So we’re happy with the total amount of power we use. We do the sensible little things; we switch off stuff at the socket when we’re not using it. We hang clothes on a line instead of having a tumble dryer. But we keep an appliance others might identify as wasteful; a dishwasher. We just like it too much. Our routine is to wash up by hand, but when we have guests or have a big elaborate meal and then feel lazy, we love having that dishwasher. Over the year it looks like it’s OK really, so although we discussed ditching it we decided it wasn’t necessary.

Full array - extension and main roof
Full array – extension and main roof
The main change we made when the PVs were installed was not what we did but when we did it. It’s better for the environment if energy used in our house comes straight from the PVs, directly displacing a CO2-heavy unit of grid electricity. If we use power at night, we’re taking an eco hit twice; once because we’re getting grid electricity at a higher emissions content, and twice because we’ve sent our sunshine power to others via the grid at a noteworthy transmission loss; ~8 % doesn’t make it to the other end. That’s rubbish.
So, the washing machine and the dishwasher go on in the daytime. High energy stuff like the kettle and the shower are going to consume more than the panels punch out whenever you do them, but daytime is better, and when a wash isn’t on is better still.

 

There’s more we could do; we have an average kettle and an average shower and they use a lot of power. The shower is 8.5 kW. And we are both too addicted to long hot showers to ever get a shower timer. But we’re honest with ourselves that we enjoy these luxuries and we want to keep them.

What’s important to us is we never, ever have to say “you can’t turn that on”. We just get on with life as normal. You quickly forget why laundry-time is about 11am when the sun will be high and it’s just habit. We use our laptops a lot and have a constant tea-making operation going on. When we break 20 kWh in a day it makes us smile, but if it’s a rubbish

We like that any set of people could move into this house, and without changing a single bit of behaviour, they’d have a massively decreased electricity footprint.
With the recent developments in home storage batteries, Tesla PowerWall being the most widely-promoted, it could soon be even easier. 10 kWh storage provides 10 x long hot showers, maybe 60 x boiling the kettle. 2.6 MWh a year averages to 7.1 kWh a day. So this battery would instantly take our house off-grid for a long stretch of the year, since it could provide a day to two day’s power even if PV output is very low. Based on our 2014 generation data, we think we’d have around 200 consecutive days entirely grid-free; we’ll be able to calculate this better once the new Open Energy Monitor is installed. We’d only need to take from the grid in the depths of winter.

 

Is an eco home cold?
 
No, ours is pretty cosy. Because it’s insulated so well, the sunshine and the people tend to warm it up ok. We keep our gas boiler off completely between mid-March and mid-October. It doesn’t cause a problem. We have two little low-power electric heaters, 400 W each, which we specially bought to suit the PVs. If it’s a cold but sunny day, first port of call is to switch these heaters on to top things up. We’ll pick a room or two we’ll mostly be in for the day and just heat that area. When it’s a small house anyway this isn’t particularly difficult to accommodate.
If it’s both cold and overcast, we make use of the boiler. Because we both work full-time, it’s on a fairly restricted timer, and then controlled with a thermostat. We have a wireless one you can take with you. We carry it about so the temperature is set right for where we are.

 

Since our old boiler packed up and we got a new one, we’ve had new thermostatic flow taps on the radiators. They haven’t been very useful though, since if you change it and then move rooms you have to alter the taps set up again. We don’t really see the point, and we don’t really use them, they’re just all set the same.
New Boiler!
New Boiler!
It’s worth saying, our preference is for a moderate temperature in the house. We dislike having a home heated really hot, and we have both cultivated exquisite jumper collections we love to wear.

 

Sometimes our guests want the place hotter than we’d set it up. We will happily turn the boiler on outside of normal months for their comfort, and since the new boiler’s been in, it’s easiest to just hand them the wireless thermostat and say “set whatever you like”. It doesn’t make a big difference to the overall picture, it’s our day-to-day habits that influence it more.
What are the bills like?
 
Basically energy bills don’t exist for us anymore. We use about £25/month of grid electricity, and about £10/month gas which is heavily in the winter and obvisouly pro rata’d.

 

FITs and export tariff payments are made quarterly. Obviously they vary depending on generation. But it’s always significantly more than the energy bills.
So overall our house doesn’t cost us money to run, it looks after us.

 

Dealing with the rubbish

 

In the house, we recycle as much as possible. Our council pick up recycling for paper, card, plastic containers & caps, glass, and tins. There’s no food waste collection, but we compost our raw food waste/teabags for the community garden down the road. We collect up more unusual recyclables over time and take them to the main centre now and then; tetra pack containers, small electrical items, batteries, bits of metal, bits of wood. Old furniture goes to the community furniture warehouse or up on Freecycle. Old clothes go to the charity shop or the cloth bank if they’re really knackered. We’re in the habit of making use of packaging again in the house where we can.

 

By recycling everything possible, you become aware of it when you’re buying things and try to avoid them or only buy the minimum you need. So examples of stuff that’s a pain to dispose of responsibly  are paint/highly volatile chemical items, things that are not possible to disassemble like metal items moulded into plastic, food with tons of packaging particularly if it’s got foams, and cheap electronic items that won’t last long. Sometimes you have to buy them but it’s good to avoid just accumulating unnecessary stuff.

 

What goes in the general waste bin is mainly cooked food waste, plastic films, plastic-coated foils (like crisp packets) and expanded foam packaging. Actually food packaging and food miles/seasonality would be the next big thing to act on to continue getting our carbon footprint down.

 

Was it worth it?

 

We started this as we were fed up with what is described as affordable housing being completely not so (about us page). The money costs were largely as expected, the time costs were pretty high. It meant months of living in a not-finished home, of organising every detail of the bought-in work, and painting or sanding or sawing every night as soon as we got in from work. Occasionally we got really frustrated by it. But we’ve met our energy and cost goals, whilst making the house a cosier, cheaper and more sustainable place to live. We also got the chance to make a comfortable home that’s just right for us, and we’ve found it’s far easier here than in any rental places we’ve lived to follow an eco lifestyle even when you’re really busy. We think this place is set up so that anyone who lived here would be more eco even if they didn’t really think about those issues. We’ve always believed that living in an eco house should improve your quality of life too, and we feel like this house does that for us.

 

Yes, it was worth it!

 

Links

 

Mid-Terrace to Mid-Terrific!

Recently we were asked to be part of the York Green open homes! This has caused me to reflect a little on our initial goals and how we have fared. As we spoke about in our first blog/“about” section, we are extremely frustrated by the how inefficient the homes we have lived in are and what is classed as affordable housing these days.

Essentially our goals were to make a home nicer to live in, making it more energy efficient and more sustainable at the same time. Quantitatively, we aimed to do this via spending ~10% of the value of the house on energy saving and producing measures that would allow us to meet the “A” grade EPC standard. As we’re doing Green open homes, i’m going to try and briefly highlight the rough interim energy and finical costs of the project.

As an attempt to preempt what i expect will be the biggest FAQ, i’m going to try and outline the money side on the project. To be 100% clear this is rough estimate. Although we can talk about the money and carbon case generally, honing down more figures is challenging as we don’t really have a good handle on the house’s prior performance. This is because we started doing our retrofit slowly from day one, we don’t have any data before we moved in, and then had an some alteration re-done by an insuracne company. This is a broad (very) rough attempt at approximating what we’ve achieved so far. In a year or so i will have enough data to do this more robust, but is i suspect the money side of things is a big questions for people so here it goes…

The (estimated) overview Financial Case for our EcoRetrofit
It make me a little uncomfortable giving away such exact details… but as everyone asks because it is a litmus test for the project’s success and since we live in the age of Zoopla it’s not like its difficult to find out anyway.
So we bought the terrace for £121k, this was the bottom of the market for houses close to central York. There were some issues, like a leaky roof and a damp problem, which is relatively common for a house of this age and type. Following our eco-renovation, the house was recently re-evaluated to be worth £145k, an increase of £24k (20%). This far outweighs the cost of all of the energy improvements (~£12k). The attribution of the increase in value is challenging as the housing market has increased the price as as-well as the renovation, but as zoopla tells me this is 10% it is fair to say the eco-renovation played a part although the percent due to the “eco” and “renovation” part of the eco-renovation is unknown. However, it is important to caveat this with the obvious fact that until we sell the house (which we currently have no intent to do!), we cannot know for sure that this increase is real.

The real savings that will payback the cost of doing all the work are seen through the bills (assumed at £26/month, 50% 
usage at house). For the first year after installing the panels our bills total of ~£37/month for electricity and gas, which is paid for in excess by income from the PVs (~£60/month, albeit offset as one payment is quarterly and the other is monthly). These bills are low, for a house our type i would estimated expected bills to be £700-900. I predict these to increase after next winter as we essentially had just electric heaters this winter due some issues with the boiler, although with that said the electric heaters are more expensive per kWh, but regardless it is low.Getting the money to do these kind of work and the upfront nature of the costs often deters people. We paid for the work using a mixture loans, savings and income. With current interest rates low borrow money if someone is willing to lend it currently. So this shifts paying back for the cosy/cheap to run house to over the payback period. The government “Green Deal” scheme could be an option for many and it has been extensively discussed on the internet, including on MoneySavingExpert with some great worked examplesenergy saving trust, and YouGen. The point needs to be made though that a lot of improvements that have a large impact are cheap like managing drafts or made very simply subsidised/free by the government such as installing loft insulation.

Best & worst of our larger choices

 

Best of our larger choices: Photovoltaic Solar Panels
The solar panels (PVs) are out performing our expectations. Not only in energy production (130% of consumption in the first year), but also in the impact on our bills. The payback is currently less than 7 years and could be lower if the we use more at the house rather than sending it to grid. This would be easy if we had hot water tank, as you can just route the excess electricity to heat the water that would have been heating by gas or electricity for baths etc later in the day. For us it is more likely that a battery storage system like Ecotricity’s Black BoxTesla’s PowerWall or Enphase’s energy storage system as our consumption is majority through electricity.

 

With a guaranteed lifetime of 25 years, and even if the panels do degrade by ~25% in output terms over this period (maxim allowed by warrantee), its hard to imagine them packing up straight after this. I’m intrigued to see how they fare over longer timescales, but just taking the next 20 years that they receive government subsidy they represent a huge saving in carbon dioxide emission

 

On the carbon side, they have already paid off their carbon from production. We’ve recently done a lifecycle assessment on the panels, and will post this shortly. Without giving too much away it looks good, and depends heavily on the choices of how you treat the export of electricity to the grid from he PV panels.

 

 

Worst of larger choices:  Upgraded Boiler (D=>A)
We weren’t naive about this, but this was a compromise we had to make. Although we were told, and i know others often are, a new boiler is the best action. for low users like ourselcves the enormous cost of a new boilder (£2.3k, installed), just doesn’t add up. And thats not even considering the embodied energy cost of new boiler. The boiler broke whilst i was working out of the country and we had previously refused to upgrade against recommendations, along through the tick box exercise of EPC certificate  this and the TRVs have pushed us firmly into the A category.
 

Financially the payback can only come from savings. Considering our gas bill is currently ~£10 a month (although, i expect this to rise to £15 a month),  this is basically impossible. This is low as our shower is an electric one, we may not keep our house as hot as some do, and hopefully some credit to all of our eco-renovation efforts! I estimate the payback period for the boiler to be greater than the current UK life expectancy. The last boiler was only 5 years old (Chaffoteaux et Maury, Minima Mk2 30 FF), and although we’ve got for a more reliable model with 10 years warrant (Worcester, Greenstar 28) i won’t be holding my breath.

From an environmental angle, even though we are on biogas tariff, we pull from the main grid and this essentially still fossil fuel. On this count an air source heat pump would actually have been better, but for cost reasons and due to working out of the country at the time we needed to replace the boiler it wasn’t an option. I remain skeptical this technology and would prefer ground/water source for energetic reasons if we had the space, although I have friends who are convinced.

Any lingering thoughts, Would you do this action again to another house?

Yes. On the financial side alone it was definitely worth our while over a 6.2 year timescale (with less than 4.5 years remaining). Over long the financial case gets stronger. If we include other qualitative improvements like how draughty/cosy the place is then the yes is even more resounding. The smaller and cheaper changes will have contributed a lot to this. I will be able to do a better analysis when i have more data, from which the real savings in energy consumption and costs can be calculated.

 
I’ve just tried to outline the broad money side of our project with a few examples. But i can’t personally do this without pointing out that “Externalities” (e.g. costs of air quality) of conventional heating/Electricity options are thought to be huge. Although we pay for these via our taxes etc, it is important to bare that in mind ( a back of the envelope calculation gives air-quality costs as £250-850 per person per year, which is from £1654 bn in costs and ~64.1m people ). Trying to look at more of the picture (but by no means all!) rather changes the way we can see the economics of energy pricing.
 
Its is challeneging to express quite what a improvement it is to live in a warm cosy house without huge cost ( energetic or financial ). It will be possible to quantify this in the near future, and there are some great examples of projects that have managed this ( like a carbon coop project with @zapaman in Manchester ). Here’s to cosy, more sustainable and cheaper living!

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Disclaimer: I am not a financial advisor and do not work in finance. This article links to research/information I’ve found and expresses my own opinions and experiences. I hope it is useful to you but in no way am I offering financial advice or recommending a particular course of action. If you’re considering any investment you should seek information from a wide range of sources and speak to an independent financial advisor before making any decision. I’ve tried to be as accurate as I can, and when prices have been quoted those were available openly on the date of publication. If you see any errors/broken links/have any comments please just drop me an email or comment.