Balraj Appadu Posted January 9, 2021 Share Posted January 9, 2021 Advice on choosing roof insulation: ICF house built to neat passive standard Which type of insulation better PIR or Hybrid Actis? Is there a big cost difference to achieve similar U values? About 140m2 of pitched roof with 3 dormers any advice welcome Roof construction.pdf Link to comment Share on other sites More sharing options...
PeterW Posted January 9, 2021 Share Posted January 9, 2021 PIR. Every day of the week. The hybrid stuff is a thinly insulated turkey roasting bag of suspect credentials which when detailed correctly stops your convection losses but is questionable on anything else. Link to comment Share on other sites More sharing options...
Mr Punter Posted January 9, 2021 Share Posted January 9, 2021 The Hybris product is very flammable - class F. There will be some spiel about it being fine as it is protected by plasterboard etc but get a sample and hold a flame under it for a few seconds before you decide it is what you want in your house. 1 Link to comment Share on other sites More sharing options...
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