Hello, Am building an extension with a leanto roof with a pitch of 16 degrees. Can anyone advise if there is any specific type of breathable membrane I should use for a roof of this pitch or are they all the same. Thanks for any advice offered.
Breathable Membrane
- Thread starter MRSOLO
- Start date
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membranes or roofing felts do not recognise pitch. just make sure you fix the membrane with adequate joint lap.
i have breathable membrane but not sure how to fix it onto my roof from the inside (see pic below)
Also, Whats a joint lap?
Also, Whats a joint lap?
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tony this is an old post you are resurrecting.put your insulation in, fix the vapour barrier inplace with staples or nails, then gyproc.
oh, didnt know it was old, i just did a search. sos.
By the way, what is a gyproc?
By the way, what is a gyproc?
^woody^,
I was advised on my post/thread (below) to put in a breathable memebrane so I went bought a 50m roll yesterday. I have'nt put it in yet but is this advise not correct then?
//www.diynot.com/forums/viewtopic.php?t=169156&start=0&postdays=0&postorder=asc&highlight=
Tony,
I think you are confusing a breather membrane with a vapour check. A breather allows vapour to pass through it whereas a vapour check goes on the warm side of the insulation and stops vapour passing through it.
I think you are confusing a breather membrane with a vapour check. A breather allows vapour to pass through it whereas a vapour check goes on the warm side of the insulation and stops vapour passing through it.
? im confused, which one stops fungus/mould growth? this is the one i bought below...
http://www.wickes.co.uk/Slaters-Roofing-Felt/Breathable-Membrane/invt/164068
It says... Allows water vapour to escape from roof structure
Should i have bought a vapour check instead? as i want to stop any vapour from going onto the timber and shuttering ply?
change it for 500 guage visqueen.
change it for 500 guage visqueen.
cheers, i will get this instead.
yes its used as a vapour check barrier.
but if i staple it to the joists (im assuming the bottom side is the warm side of the roof) how do i seal the holes the staples create?
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