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Showing results for tags 'fixing through pur insulation'.
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I'm looking in to converting a detached garage to a living space. The wall construction is 200mm lightweight blockwork rendered externally. As the garage goes right up to the boundary my only option is internal wall insulation. I will need multiple things attached securely to the wall (toilet, boiler, sink etc) so I think insulated plasterboard is going to be too much of a pain to use. If I use internal studwork with foil backed PIR between studs does anyone have an idea of the best construction for this which will achieve a 0.28 u-value or lower to satisfy building regs? I was thinking of 100mm studs with 75mm foil backed insulation pressed up to block work 25mm void OSB board pattress where strong fixings are required 300GA Vapour Barrier 12.5mm Gyproc Wallboard Plaster Skim Questions are: Does this sound sensible? Would it be better to have insulation flush with front of studs? Can I use the 25m void to run cables/pipes?
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Been working hard on the plans now we have had the all clear from BC, managed to get the stair design put back otherwise we are good to go. In drawing things up I came across the build up below from the architect. Its only on a portion of the front and rear walls (the others are 300mm I joist and 40mm PUR) but I am worried about several things and though I might seek thoughts from THE forum. My concerns are: 1. How to seal the bottom of the PUR to the top of the EPS to ensure no cold bridging? 2. What methods are there, other than long nails, to fix the Vertical battens through the PUR to the I joists (which only have 36mm thick flanges) and will these support the weight of tiles, horizontal battens and fixings. (I had thought of M12 studs fixed to the flanges -bolted both sides, and then fed through the PUR at intervals but it feels like a phaff although it won't be much of a cold bridge overall it feels like a great dew point opportunity. 3. What sort of thing (detail) can I do along the bottom of the overhang to make it look good, seal the bottom from insects but allow air flow up behind the tiles? Any thoughts greatly appreciated.
