DIYbanter - View Single Post - slate roof

Stuart Noble

wrote:
Seems fine, *but* almost anyone I mention it to sucks their teeth and
says 'ooh the damp gets into the joists'.

The danger is that any rain blown under the slates will be trapped for
much longer than normal between slate and insulation and will lead to
wood rot in the rafters.

Building next to ours had the foam treatment about 15 years ago. I
sucked my teeth at the time but it appears I was wrong.