kingspan celotex insulation

2cent

Well-Known Member
Got a bare loft. Massive. Thinking to get 75mm celotex and slot it between roof rafters . Then do a layer over top of 20mm giving 100 mm thickness.
Walls in wool rock and then 75mm celotex sealall up. Out vents out roof and invents from house.
Wall celotex before the loft hatch ofc

Once sealed it will be cool to grow straight in yea? no need to tent up can just grow... will the 100 mm be enough in the snow to keep warm and in the hot sun to keep cool?

Upgrading from50mm so hope it would be perfect .
 
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