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by smallpaul
Tue Nov 26, 2013 9:00 am
Forum: Insulation Forum
Topic: Air Gap Required in Roof as Want to Fill With PIR Boards for Extra Insulation?
Replies: 1
Views: 3875

Air Gap Required in Roof as Want to Fill With PIR Boards for Extra Insulation?

We have a sloping roof which comes down over our staircase. I have discovered that some of this doesn't have any insulation in it, and other bits of it don't have enough! The rafters are only 100mm, so not a huge amount of room to add lots of insulation between the rafters. It is an old house, and t...
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