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Looking at moving house and I am considering installing external wall insulation on the new place.
Anyone else installed it?
Did you use a dedicated installer or just a general builder?
DIY?
What sort of cost was it?
Did it make much difference?
A lot of suppliers seem to be double glazing companies and they want to come out to you to supply a quote. There isn't any guidance on price on their websites, that always makes me suspicious.
Looking at materials only it seems to cost about £30 per m2, so would £50 per m2 supplied and fitted be about right?
Doesn't this stuff make stone-cladding look classy? 😀
Doesn't this stuff make stone-cladding look classy?
No. I bet you have passed hundreds of buildings that have EWS on and you would not know.
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We had it on an old terrace, and I used to sell it.
It does work, it works better than internal or cavity. Think wrapping a building in a warm, waterproof jacket.
However, it is very reliant on good detailing around roofs, windows and DPC level to achieve a weatherproof result. Get a good contractor or builder on it. Costs seem reasonable to me.
I know a bit about it.
Anyone else installed it? - The company I work for install about £40million quids worth every year
Did you use a dedicated installer or just a general builder? - Dedicated installer is the way to go. Done well it is a great product. Done badly it's a ballache.
DIY? - I wouldn't recommend it unless you are already skilled at plastering / roughcasting.
What sort of cost was it? - An all in rate of about £85/m2 (net area) is about the current market rate. You need to factor in lots of additional costs that you wouldn't immediately think of.
As you are increasing the wall thickness you will most likely need to extend the roofline to accommodate this. You need to extend any services which penetrate the wall like overflow pipes, gas flues, cabling for external lights / satellite dishes. You'll need to extend the brackets for gutters and downpipes which usually ends up with those getting replaced. You need to install extended window cills (usually an Aluminium overcill)
Did it make much difference? - Yes, it makes a huge difference to the thermal performance.
and I used to sell it.
Who for Matt?
Ooooh! Woodfibre! That's a new one on me.
I thought I had come across most of the systems out there but I like the look of that. Very polar bear friendly I assume.
All the other systems i've seen are EPS, Mineral fibre or phenolic.
Every day's a school day. Noted for future EWI-geekery.
I thought I had come across most of the systems out there but I like the look of that. Very polar bear friendly I assume.
Yes indeedy. Very continental - as are most of their products - little known in UK, but bazillions of homes on continent use it, and the clay blocks etc.
Works well on older building IMO, as vapour can escape, less of an issue on new or well detailed buildings...costs a fair chunk.
. double post .
At £85m2, does it ever pay for itself in a reasonable time period?
Or is it purely a carbon footprint reduction thing?
I mean a 3 bed semi would be about £10,000, even saving £500 a year, which seems optimistic, that's 20 years.
At £85m2, does it ever pay for itself in a reasonable time period?Or is it purely a carbon footprint reduction thing?
As with most things in life, it's not as simple as that.
There are numerous grant funding schemes which fund the vast majority of the schemes which our company installs. (HEEPS, ABS and ECO funding) Some of these are available to private owners.
How they work is, I confess, a bit of a dark art to me. We have a team of people who know these schemes inside out and sort that side of the business out.
Payback periods vary wildly depending on the existing thermal performance of the building and the offsetting of costs through funding schemes.
It would surprise you the amount of people who will happily install £10k of Marble worktops / Audio visual equipment / ornamental garden features etc. etc. because they are shiny but with a payback time of NEVER but will baulk at spending £10K to make their house warmer and save them money.
Perchy - What areas does your Company cover?
What do you do? Are you an installer?
Perchy's last point is so true.
Perchy - What areas does your Company cover?What do you do? Are you an installer?
All of Scotland. I'm a Quantity Surveyor. The company is in installer of EWI, IWI and all other sorts of insulation for large scale social housing providers / local authorities.
