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  1. We are erecting a steel portal frame 8m x 12m i have positioned the 9 inch treated purlins with small wooden blocks beneath them so I can attach white corrugated tin beneath the wooden blocks will enable the edges of the corrugated tin to slide in, and sit over the i-beams by approximately 20 mm above this layer of tin and between the 9-in purlins I wish to use rolls of fiberglass insulation of which I have a very large quantity people have mentioned Vapor barriers and air gaps beneath the black top layer of tin but I can't find an exact detail of the Construction I am proposing any advice would be gratefully received I'm very keen not to add a vapor barrier if it's not necessary
  2. Hi Does a garage ceiling below a habitable space require a vapour barrier? Fire requirements all known. Thanks M
  3. As I mentioned in my first post, I will split the tasks which I need to work on. I hope I am posting at the most relevant location, this post would be about the "insulation" of a granite house crawl space. The crawl space is about 30 cm deep. I have been advised to install/lay a heave gauge vapour barrier and put sand on it as an extra protection against vapour (joist wet root). When I started to read up on it, I came across a few different solutions: heave gauge vapour barrier (just on the ground) and put sand on it From my readings: it could create puddles, as water could leak from the side walls heave gauge vapour barrier on the joists From my readings: bad idea could just collect water and pretty much continuously soak the joists in it heave gauge vapour barrier on the walls as well From my readings: it might require a pump and/or guttering system heave gauge vapour barrier on the walls, block the air vents, install dehumidifier and sensors I do not know how would that work with granite house and cavity walls, it might will depend on the wall insulation which I am still looking into it, but that's an other topic What would be the best way top lay down the heavy gauge vapour barrier, do I even need one? Please let me know if you need any other information and if I can answer, I will upgrade the original post.
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