- Spray foam roof insulation
We have an area at the front of the house that is very cold, single story with a pitched roof.
The loft space is insulated but I think it needs a bit more.
Anyone tried that spray foam insulation? Apparently it can be quite expensive and installers can vary a lot. I’m not really looking for a quick payback, more a practicable, comfort thing.Posted 4 months ago
OP – do you mean it has a pitched roof with a normal suspended ceiling or is it open with the interior pitched too (so just a small gap between the inside and outside of the roof)? If so, when was it built, what insulation was specified and was it signed off? We had a pitched rood like that and never had an issue with it getting too cold.Posted 4 months ago
OP – do you mean it has a pitched roof with a normal suspended ceiling or is it open with the interior pitched too (so just a small gap between the inside and outside of the roof)?
Pitched with a normal suspended ceiling.
when was it built
About 1840, a think the building regs were a little looser back then. 🙂
By the sounds of it, I will be keeping away from the foam. Might just try celotex across the timbers. One of the problems is that the loft hatch is tiny.Posted 4 months ago
If that’s the case then definitely just put better insulation up there as there is plenty of space for it – just make sure you leave the necessary breathing space and that any light fittings are correctly protected (ie, halogen downlighters having protective covers fitted). Could you make a bigger opening to make your access easier if it really is an issue that needs properly resolving?Posted 4 months agofenboySubscriber
go for more rockwool/earthwool rolls over ceiling etc, its the most cost effective for your application and easier to get through a loft hatch. You won’t get celotex boards through the hatch. Avoid the spray stuff its not very good and only suitable for very specific applications not yours.Posted 4 months agowrightysonMember
Just be careful on the whole “rockwool” thing. Rockwool is a brand and produces a lot of products some of which are not for thermal insulative purposes.Posted 4 months ago
Tri iso type stuff is a good shout and I’ve used it to very good effect in my
summer house/pub/shed combo building. Very very easy to use and can be placed easily with a simple good industrial stapler. Quite a few brands around with a few varying suppliers that I know of.
As for your loft hatch it would be very easy to take one ceiling joists out to a 600 length and “trim” it out on to the adjacent joists either side.wobbliscottMember
I looked into it recently and wasn’t convinced. Though to be fair seems to be more popular in Canada so not sure if houses are constructed differently over there and therefore avoid the issues you hear of in the UK, or the installers are just more experienced and better, but despite the horror stories, it is a bit of overkill for the UK. Fine for Canada where it gets properly cold and wintery instead of the mild dreary winters we get – it just doesn’t get cold enough here to justify it and other cheaper options are perfectly adequate, so no point in taking the risk and laying out all the expense.
I’m sticking with good old fashioned roll out insulation and adding an additional 200mm to get upto the recommended 300mm.Posted 4 months agodirtyriderMember
just sold a house with spray foam in the roof, was there when we bought it 7 years ago, no survey issues, this time the buyers surveyor flagged it as an issue, rot etc from trapped moisture (im 100% sure that if we had decided to live there for the next 20 years there would have been no issues) bank wanted a £10k retainer for a reroof, we haggled by supplying quotes, still had to knock £4.5k off to secure the sale, house was reroofed within 4 weeks of us moving out, so it wasn’t a haggling ploy,Posted 4 months ago
You must be logged in to reply to this topic.