JackofAll Posted November 30, 2023 Share Posted November 30, 2023 So forgot to put on rafter roll on before membrane, half the roof is now slated. Could staple it on from inside to each side of rafter but this got me thinking... one section of the roof will be blown cellulose at rafter level, the rest cellulose at joist level. So is rafter roll necessary as the cellulose is breathable? Link to comment Share on other sites More sharing options...
nod Posted November 30, 2023 Share Posted November 30, 2023 You can You will need to split each piece and staple to the side of the joist Link to comment Share on other sites More sharing options...
JackofAll Posted November 30, 2023 Author Share Posted November 30, 2023 13 minutes ago, nod said: You can You will need to split each piece and staple to the side of the joist Is it necessary @nod , the outer membrane is breathable Link to comment Share on other sites More sharing options...
JackofAll Posted December 1, 2023 Author Share Posted December 1, 2023 Is condensation a possibility or probability if there is no airgap at joist level if so, what's different when insulating at rafter level? Link to comment Share on other sites More sharing options...
JackofAll Posted December 10, 2023 Author Share Posted December 10, 2023 Started fitting roll from the inside PITA anyhoo, am still thinking that as the roof is counter-battened, with breathable membrane is this necessary? Anyone? Link to comment Share on other sites More sharing options...
Blooda Posted December 11, 2023 Share Posted December 11, 2023 Ours was missed off. We cut to size and stabled on. Questionable whether is is needed, given no Eaves vents and breathable membrane, but we fitted anyway. It maybe a PITA now to fit, but imagine what it would be like when the BCO or warranty person comes along at the end when you have insulated, and say's "Where's the rafter roll" ? Get a bump cap ... bargain Portwest Semi-Ventilated Short-Peak Bump Cap PW89 - Workwear.co.uk Link to comment Share on other sites More sharing options...
JackofAll Posted December 11, 2023 Author Share Posted December 11, 2023 5 hours ago, Blooda said: Ours was missed off. We cut to size and stabled on. Questionable whether is is needed, given no Eaves vents and breathable membrane, but we fitted anyway. It maybe a PITA now to fit, but imagine what it would be like when the BCO or warranty person comes along at the end when you have insulated, and say's "Where's the rafter roll" ? Get a bump cap ... bargain Portwest Semi-Ventilated Short-Peak Bump Cap PW89 - Workwear.co.uk Already have one, two bangs was enough 😀, will keep on trucking so 1 Link to comment Share on other sites More sharing options...
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