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Attic insulation circulation gap

Ladder22 · 2023-03-20 22:07:46

Any idea if leaving no gap between 300mm rockwool and chipboard attic floor will definitely create condensation on the floor and problems down the line? The wool I bought goes right up to the board, so it's a bit of a pain to create a gap, but I'll do it if leaving no gap is a definite "no no". Cheers

20-03-2023 10:07pm

#1

Ladder22

Registered Users, Registered Users 2 Posts: 48 ✭

Join Date: September 2007

Posts: 36

Any idea if leaving no gap between 300mm rockwool and chipboard attic floor will definitely create condensation on the floor and problems down the line? The wool I bought goes right up to the board, so it's a bit of a pain to create a gap, but I'll do it if leaving no gap is a definite "no no". Cheers

0

Comments

#2 20-03-2023 11:43pm

MicktheMan

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Join Date: August 2008

Posts: 2849

It will make do difference but make sure to leave sufficient ventilation gap (50mm) between the top of the insulation and the roof felt at the eves.

2