PIR INSULATION

grifter · 5 Feb 2024

I am fitting PIR insulation between ceiling joists. My question is should the face be flush with the joists so the plasterboard is touching it or do l need to leave a gap between the pir and plasterboard?

^woody^ · 5 Feb 2024

Tight to the plasterboard

SpecialK · 6 Feb 2024

Tight and tape it all together for a vapour barrier. Assume you have an airgap between the top of PIR and felt?

grifter · 6 Feb 2024

SpecialK said:
Tight and tape it all together for a vapour barrier. Assume you have an airgap between the top of PIR and felt?

Yes, plenty of space. Thanks

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PIR INSULATION

grifter

^woody^

SpecialK

grifter

DIYnot Local

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