mick43 Posted November 18, 2012 Share Posted November 18, 2012 I can't agree with a buddy if roof felt is a waterproof membrane or not on a tiled pitched roof ? Surely it can't be as the water would build up on the horizontal battens ? Yes it may be a last layer of defence, and probably gives a good wind defence - but not water/rain ? Googling... seems to confirm above... but not definitive as too many items, and most referring to flat roofs etc. thanks Quote Link to comment Share on other sites More sharing options...
Jay Posted November 18, 2012 Share Posted November 18, 2012 What you really want for water proofing on flat roofs is liquid coating system, probably durathan. As its easy to apply and is elastomeric membrane. As for felt pass lol. Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted November 18, 2012 Share Posted November 18, 2012 I spent many years delivering truck loads of sand to Wimpey and Mcalpine and yes I can confirm that not only did they put roofing felt under the tiles but it was delivered by the truck load on a daily basis. I believe this is what you were looking for? Not whats the best thing to use but do they/did they? Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted November 18, 2012 Share Posted November 18, 2012 I can't agree with a buddy if roof felt is a waterproof membrane or not on a tiled pitched roof ? Surely it can't be as the water would build up on the horizontal battens ? Yes it may be a last layer of defence, and probably gives a good wind defence - but not water/rain ? Googling... seems to confirm above... but not definitive as too many items, and most referring to flat roofs etc. thanks Roofing felt is waterproof (I assume you're refering to a Type F felt) ... these days a breathable membrane is used beneath a tiled roof, the best one being Roofshield IMO ... any water which gets through to the felt layer will not penetrate and will be collected in the gutter ... the water will not build up on the horizontal battens because the felt is usually (but not always) draped between the rafters thus allowing any water to drain down the slope of the membrane Quote Link to comment Share on other sites More sharing options...
mick43 Posted November 20, 2012 Author Share Posted November 20, 2012 thanks chaps Quote Link to comment Share on other sites More sharing options...
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