CalvinHobbes Posted November 6, 2021 Share Posted November 6, 2021 Hiya, going to see a passive house tomorrow and this is the breakdown... Internal to External Plasterboard / Timber cladding 50mm service void Intello airtight membrane 219mm timber frame infilled with cellulose insulation 10mm OSB Breather membrane 100mm Kingspan Kooltherm K12 50mm batten and counter batten Siberian Larch or Cement fibre board cladding We are building with block and wonder what is the most cost effective choice to achive passive house sort of standard? Can anyone give me a similar cross section description? Link to comment Share on other sites More sharing options...
Iceverge Posted November 6, 2021 Share Posted November 6, 2021 Wet plaster. Block. Wide cavity with EPS beads. Block. Wet plaster. 1 Link to comment Share on other sites More sharing options...
joe90 Posted November 6, 2021 Share Posted November 6, 2021 Wet plaster, block, wide cavity with beads or batts, brick, (I don’t like render, needs maintenance). 2 Link to comment Share on other sites More sharing options...
CalvinHobbes Posted November 6, 2021 Author Share Posted November 6, 2021 28 minutes ago, joe90 said: Wet plaster, block, wide cavity with beads or batts, brick, (I don’t like render, needs maintenance). Cheers, I know you did a 250 cavity, we can only go up to 200. Bit cheeky but you don't have a pic of your batts during the build? Link to comment Share on other sites More sharing options...
tonyshouse Posted November 7, 2021 Share Posted November 7, 2021 Link to comment Share on other sites More sharing options...
joe90 Posted November 7, 2021 Share Posted November 7, 2021 9 hours ago, CalvinHobbes said: Cheers, I know you did a 250 cavity, we can only go up to 200. Bit cheeky but you don't have a pic of your batts during the build? No, my cavity was 200mm, no picture (must be the only thing I didn’t take a photo of) but similar to picture above by @tonyshouse. 1 Link to comment Share on other sites More sharing options...
cwr Posted November 7, 2021 Share Posted November 7, 2021 9 hours ago, CalvinHobbes said: Cheers, I know you did a 250 cavity, we can only go up to 200. Bit cheeky but you don't have a pic of your batts during the build? How come you can only go to 200mm cavity, founds or footings already in? 1 Link to comment Share on other sites More sharing options...
CalvinHobbes Posted November 7, 2021 Author Share Posted November 7, 2021 8 hours ago, cwr said: How come you can only go to 200mm cavity, founds or footings already in? Architect is firm on it. Link to comment Share on other sites More sharing options...
CalvinHobbes Posted November 7, 2021 Author Share Posted November 7, 2021 9 hours ago, tonyshouse said: Oh thank you, that looks excellent. What width was the cavity? Crikey, can't tell you how excited we will be to even get that far! Link to comment Share on other sites More sharing options...
joe90 Posted November 7, 2021 Share Posted November 7, 2021 17 minutes ago, CalvinHobbes said: Architect is firm on it. Why? It’s your build!, (unless your founds are already in?). 1 Link to comment Share on other sites More sharing options...
Brickie Posted November 8, 2021 Share Posted November 8, 2021 23 hours ago, tonyshouse said: One thing I’d suggest if following Tony’s example-stagger the joints of the insulation sheets so there’s no chance of a small gap from inside to out. 1 Link to comment Share on other sites More sharing options...
tonyshouse Posted November 8, 2021 Share Posted November 8, 2021 I tried that but it proved more of a problem, I did slightly compress the blocks of sheets together to avoid that problem 1 Link to comment Share on other sites More sharing options...
tonyshouse Posted November 8, 2021 Share Posted November 8, 2021 305mm wide cavity 3x100mm batts, they don’t like sliding over each other, crumple, roll up or leave gaps at the corners. the brickies put some in which I had to remove and re do as folded! I banned them did every bit myself. 2 Link to comment Share on other sites More sharing options...
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