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New Flat Roof, warm roof construction - joists, ply, Celotex, ply. Can anyone please help me confirm where exactly the vapour control layer is meant to be? I checked the roof and could not see any type of membrane/layer - I can clearly see the Celotex between the ply from above and below...

Thank you again Tony, I appreciate the time you have taken to help. Are you a roofer? I see what you mean about the verges, I thought they looked unfinished. The gap between the slates and the felt looks large enough to allow rain to drive in sideways (that particular gable end is facing...

Thanks so much Tony for your detailed reply and the interesting articles. Regarding the headlap, I uploaded a pic of the side of the house. I think this is enough (he said its about 4 inches). However, it looks the same all the way up to the top and not decreasing as you mention. He said he...

Thanks for your comment, you are correct, the slates are indeed Spanish and quite thin/brittle. I uploaded a pic of the verge to show the half slates you mention. Do they seem ok? Also uploaded a close up of the flashing round the velux. As you and Catlad say, this looks wrong. It looks like...

I was given option of slate. I am not a roofer.

Correct - why would a roofer give a quote for slates vs tiles if slates are so unforgiving? I'm not the expert - he is. Never was it mentioned that this problem would occur. Can anything be done?

Hello! I'm new to the forum so please forgive possible topic duplication. I recently contracted a local roofer (via checkatrade - got 3 quotes) to strip, felt and slate my 1930's bungalow which previously had french clay interlocking tiles leaking all over the place. I opted for natural...