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Showing results for tags 'fall'.
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Attaching foil faced PIR to OSB isn't as simple as I at first thought. Rooting around on Tinternet only shows how wide the choices are: the Internet as shared ignorance perhaps? So I thought I'd ask how BH folk do it. This video is one which admits that fashions change. Roofers used to use nails, then screws then thermally broken screws and now foam - expanding foam at that. I need to attach 270 ml of PIR to my OSB deck. One layer of 120 and the second 150. How would you do it?
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Bit of help needed here please. Part of our roof is flat. I am determined to avoid at least some of the problems associated with flat roofs if I can. One strategy is to create a significant fall on the roof. The question is how to create that fall easily and hopefully cheaply. The plan: The elevation: The architect has noted that we should use soft wood (SW = soft wood I assume ?) tilting fillets. I note from this post that we should make the fall 1 in 40 or steeper. (Thanks @tonyshouse) The Fall: Is there any reason why we should not build that fall into the POSI joists in the first place? (instead of using tilting fillets?) Attaching the wall plate (rim joist) As planned, the wall plate (rim joist) attachment system (threaded bar resined into the concrete behind, I should imagine) will butt up to the Durisol block face: and that is the face which is backed by 185mm of graphite polystyrene - and then 120mm of concrete. On the other side of the Utility and boots room, the wall plate abuts the 'internal' face - the concrete 'side' of the Durisol block, so there is no potential problem with that face. In short, does the 185mm of insulation matter when attaching the wall plate (rim joist)? To help you visualize my concern, here's a schematic image of a Durisol block.
