Scoobyrex Posted October 21, 2021 Share Posted October 21, 2021 Hello looking for some advice. I am planning to insulate my loft space with 400mm of knauff 044. It is a large loft space and 400mm depth isnt an issue, the loft will have access boards built into the trusses at a higher level for access and storage, so the insulation will not get compressed. The entrance hall of the house is vaulted over two stories. what would be the best way of insulating this area, im a bit confused with all the options. here is a 3d of the roof trusses MiTek 3D Viewer | MiTek UK & Ireland Link to comment Share on other sites More sharing options...
tonyshouse Posted October 21, 2021 Share Posted October 21, 2021 Sheet insulation u=0.1 best plan remember to leave a 50mm ventilation space above normal loft insulation ie deck does not touch insulation Link to comment Share on other sites More sharing options...
Scoobyrex Posted October 22, 2021 Author Share Posted October 22, 2021 So sheets of PIR around the vertical walls of the gallery above 1st floor ceiling is straightforward For the ceiling of the vaulted gallery on internal side of the trusses. Does it need a vapour barrier ? how do you fix say 100mm pir sheets on a ceiling and attach plasterboard ? Link to comment Share on other sites More sharing options...
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