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Exact make up maybe a bit technical for me. The gaps with no OSB I think are because he was running short. I’m told there is a gap between the breathable membrane and the osb, not sure what else between that and the tiles. I’m told the Marley ventilation track thing was put in the ridge and I...

Will get some photos tomorrow. Doesn’t leak when it rains just condensation when frosty or snowy. And if prolonged then it builds up and comes through the OSB. Where there isn’t OSB it drips from the breathable membrane or underside of the plastic tile vents.

Yes, I’m in Scotland - Glasgow. Extractor goes straight out the wall so no vent pipes in loft. Most of the wet is at the front (North facing) and OSB and bottom of sarking visibly wet but not as bad as previous years. It does eventually drip onto the boxes I have up there though and the flooring...

Thanks John. I have seen that advice before. Holes have been sealed, no tanks up there but there are pipes which have been lagged, and holes sealed, no downlighters. Blockage of soffits cleared when old insulation removed and new put in. No drying washing upstairs and definitely not over...

So I got a new roof in November 2021, and there was condensation but I thought it’s winter the roof has just been off and so it will take a while to properly dry out. Fast forward winter 2022 with awful snow for a week and my upstairs ceilings were wet. I investigated condensation dripping...