Search results for query: spray foam insulation

Added a pic to better describe. So, yeah, I used up lots of off cuts of pir to fill in under joists, intended to spray foam all gaps and fill inbetween joists with pir also. My thoughts being more insulation is better than none, especially on cold floor. The reason i used joists was to make a...

Ok thanks and apologies for my confusion. The part I am struggling to understand is that I can see directly through to the soffit space as there is only the one piece of timber above the window (which the window is fitted to) between the gap in the plasterboard and the soffit space. If for...

...That doesn't really tell us what the problem is in your mind Insulated concrete formwork? Single skin with waterproof render, spray foam insulation inner and bonded plasterboard? You're mooting two-of-three construction materials arranged with one as the inner and one as the outer, two of...

Yeah I was planning to spray foam the gaps and then cover everything exposed with silver foil tape. As for the electrics my plan was to cut channels in the insulation for wires and then foil tape that as well. The wall undulates a bit hence the discrepancy. And the wood wasn't exactly cut as...

Are you able to recommend a suitable insulation brand? Would the rigid polystyrene sheet stuff work? It claims to be water resistant. So would the DPC, which I'm assuming I'd tape over the trimmed foam, then need to be trimmed after the frames are fitted? And would I need a DPC on the inside...

Hi all. The cavity, where old window is fitted to outside skin, where the plaster is knocked back, is quite wide. Big gap where insulation is missing but there is insulation further back. I suspect the brickwork is too uneven to fit cavity closers even if I try to knock bits off and repair the...

Hi, another question about my UFH. I've discussed previously on this forum about my poor UFH insulation - https://www.diynot.com/diy/threads/spray-foam-underfloor-insulation.602155/#post-5375045 Due to the poor installation/insulation, my UFH doesn't heat the house very well at all. I...

Hi all. We have an original single pane window behind a built in wardrobe that is collecting a lot of condensation which is staying in the wardrobe. Got a quote to brick it up and replaster of £2.2k (!!), so wondering if instead of bricking up could just dry the window as much as possible and...

...with netting or something) and away from the edges the floor seems fine. In the older parts of the house, I had underfloor spray foam insulation done a few years ago and other than 1 very small area (where I think the builders cut away the foam underneath), we're not seeing anything like...

Can anyone help with this, please? The house was only built in 1995. Concrete blocks, with a cavity. The inner leaf blocks have patches of foam sprayed on each block for insulation. The outer leaf is pebbledashed. The interior walls are just plasterboard stuck to the concrete blocks with...

Well I definitely have a hole under my house, I know that much. Here's my thread on the topic :cry: https://www.diynot.com/diy/threads/spray-foam-underfloor-insulation.602155/#post-5375045

I understand your problem. When I had an extension the valley's were first covered with breathable membrain then made up of 2 lengths of 1 x10 or whatever in a "V" and then the fibreglass valley on to that so from the loft the plastic / fibreglass vallys are insulated by the wood and membrane...

Ref the difficulty in PIR'ing a load of screws etc I've always wanted to give this a go: https://www.abbuildingproducts.co.uk/penosil-easy-spray-foam-bundle-package.html It looks like typical expanding foam but it's actually more like like the foam that gets bad rep for being sprayed on the...

Yes I have the dreaded spray foam, a picture from further away would only show more of it :( I'm replacing some of the loft insulation 100mm between the rafters then a further 200 .

Yes probably. Oh crap you've got the dreaded spray foam insulation! That aside a photo from further away would help.

How do you know? What scientific experiment did you carry out to determine this? The change will be minor; the frames already trap air in a small chamber and it convects minimally so won't be a reasonable path of heat loss through the frame. The frame itself is a likely sandwich of aluminium...

I have some rather large aluminium bifold doors in my kitchen and they let alot of heat out. I think I have had a brilliant idea like some feedback on it. I am tempted to drill holes into the extruded aluminium frames and to spray expanding foam into the holes to give it a greater U-value. To...

I've seen it blow an old lathe and plaster wall over a bay window where someone, against my advice, tried to insulate the gap with spray foam.

Hi The other half of my 1930's semi is up for sale and I spoke to the prospective buyer today. They are having problems getting a mortgage, because the inside of the roof has been sprayed with foam insulation. They are being told it's a fire hazard. I wonder what the implications are for me...

Thanks, I’ve bought one can of spray foam to see how it goes, the access is really right. If it sucks I’ll revert to PIR. Might try to slot some cavity wall batts in above the void to insulate the wall above as after investigating that seems to be insulated with spider webs only