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  1. R

    Roof membrane visible below tiles

    Is this unusual? I may have answered my own question as I haven't noticed it on my travels. This is a ground floor lean-to. The roof membrane is visible below the tiles - is this supposed to be the case? The guttering sits at least 2 inch below the tile edge - which is also unusual in...
  2. R

    Cold flat roof help

    We're in the middle of building a cold dormer (added a couple of posts about it) and wondered if a) Is a vapour control barrier is required (contractor says not) - there will be a house bathroom and an en-suite in the dormers. b) We want to put some 5mm or 10mm thick Acoustic / Soundproofing...
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    Vapour control layer or not?

    We are in the middle of a large redevelopment - the property has a mansard roof (I didn't know what this was until recently). Long story short, the first floor rooms are kind of in the roof (see example pictures). The builders have put 100mm Kingspan between the rafters, and 25mm PIR on top of...
  4. R

    having a huge dormer built.

    We are in the process of having a huge dormer built. The approved drawings the builder is working from says single layer membrane roof covering bonded to19mm plywood, also sides from 25mm plywood (exterior grade ply). The builder has used 11mm OSB3 board all over (also gaps all over between...
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