osprey Posted September 26, 2023 Share Posted September 26, 2023 I am having my roof replaced. The ventilation doesn't look right to me.. Link to comment Share on other sites More sharing options...
Temp Posted September 26, 2023 Share Posted September 26, 2023 If its a vapour permeable membrane and tiles I dont think it needs ventilating below the membrane and not much above it due to gaps between tiles providing some. Link to comment Share on other sites More sharing options...
osprey Posted September 28, 2023 Author Share Posted September 28, 2023 (edited) On 26/09/2023 at 16:59, Temp said: If its a vapour permeable membrane and tiles I dont think it needs ventilating below the membrane and not much above it due to gaps between tiles providing some. Yes, it doesn't seem to be doing anything in the way it is mounted. The house is from the 1920s, and not vapour-sealed in the loft. I asked the roofers if facia top vent strips would be a good idea, and he didn't say the membrane would be sufficient, he just included the vents. My thought is that they either should be installed properly (under the membrane, with felt support trays and drip protection) or not at all. Edited September 28, 2023 by osprey Link to comment Share on other sites More sharing options...
Temp Posted September 28, 2023 Share Posted September 28, 2023 @osprey The vents are also used to support the first row of tiles at the correct angle - needed because they are the only ones without a tile below to rest on. Link to comment Share on other sites More sharing options...
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