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Showing results for tags 'insulation fixings'.
Found 4 results
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What are others' thoughts on the efficacy of PIR retaining clips. I have anecdotal evidence from someone about them working lose over time thus leading to draughty gap between inner leaf and PIR. My wall build up (just starting) is: 100mm Thermalite, 150 gap with 100 PIR batts, 125 cotswold stone. I will say in advance that I have an excellent blockworker who is a stickler for detailing, knocking snots off, etc. He already beat me to the punch on foil taping all PIR joints (assumed I'd have to nudge on that). I was going to start a convo with him re: sticky foaming the PIR to inner face as they work, as well as the retaining clips on wall ties of course. Overkill? Cheers Tom
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So I need to batten over our inner insulation layer on the slopes. External walls are already done as part of the TF contract. The ceilings won't be battened, we're using 1/2"TE, and all studwork and the roof are at 400ctrs. Do I need to batten horizontally top and bottom? If so i guess we'd be about 100mm in from the insulation edge to screw firnly through, yes? Or at 400ctrs is battening on the rafters enough? ta.
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I'm putting 70mm of insulation under my joists. Using 100mm screws and insulation washers. Pesky little things insulation washers; they don't tell you which way round to attach them ..... Wrinkly side-up or smooth side up? Theres a bit of me which thinks that I should have the smooth side uppermost. But you know me and thinking about stuff. Too much too often. Does it even matter?
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I've got a question on the addition of IWI to an existing structure. We have an existing building that is remaining, and I've discovered that the cavity is insulated (unusual for a double garage !) and therefore the plan to add blown bead to the cavity has now gone out of the window. So I have 65mm cavity that appears full filled with fibre so we will need to add 70mm of PIR to the inside rather than the 50mm we were expecting. That now adds a question as to how to achieve this..? I had considered using a 50mm layer which is secured back with low expansion foam and then 50x25mm battens screwed to the wall to mechanically secure it, filling the 25mm gap with a second layer of PIR between the battens. This allows me to also include a service void if needed in the 25mm insulation layer. Have I missed a better way that doesn't need battens and lots of ling fixings...??
