roofing underfelt


Postby stevec03 » Sat Apr 25, 2009 7:33 am

I have been quoted for a re-roof (tile) and the builder tells me that he has to use a thin membrane under the tiles due to building regs. I thought that the correct material was the traditional thick black coloured felt?
Can anyone advise please.
stevec03
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Postby stoneyboy » Sat Apr 25, 2009 2:50 pm

stevec03,
Assuming you have a loft in the roofspace (not a habitable room) the underfelt can either be a breathable membrane without cross ventilation of the loft space (but ventilation is required above the membrane) or standard slaters felt with cross ventilation of the loft space.
For a total re-roof your local BI will expect to be involved - check with them if they have any special requirements.
end
stoneyboy
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