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by JasonClint
Thu Jan 19, 2023 5:52 pm
Forum: Insulation Forum
Topic: Insulation board without membrane
Replies: 1
Views: 975

Insulation board without membrane

I have a 1930s semi with original roof. The roof is dry, but it's just tiles - no membrane.

Is it ok to install 50mm insulation board between the rafters (leaving a 50mm gap between board and tiles) without a membrane?
It is currently Mon Dec 30, 2024 5:23 pm