A zero-carbon housing stock is going to make for interesting times.https://twitter.com/AyoCaesar/status/1195607820584079360 …
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Replying to @aDissentient
I don't think that this sort of flammable cladding insulation is legal in Canada. If it's been encouraged under UK "green" initiatives, the vulnerable buildings ought to be identified and the cladding replaced.
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Replying to @ClimateAudit @aDissentient
Well, Lowes Hardware seems to be selling it in Canada: https://www.lowes.ca/product/foam-board-insulation/iko-polyisocyanurate-insulated-sheathing-1-in-x-4-ft-x-8-ft-337106 … From what I've heard the fire risks are acceptable when it's used on one- or two-story buildings inside an outer cladding that protects it. (Or used inside under sheetrock).
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Of course I don't know if this is the identical product to the one going up in flames in the photo, but polyisocyanurate was the Grenfell Tower material.
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One still has to be a bit careful because flammability inhibitors can be added; not all foam is equal. But they call them "inhibitors", not "preventers", for a reason.
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Replying to @NYarvin @aDissentient
why don't they use rockwool or fiberglass as insulation?
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Replying to @ClimateAudit @aDissentient
They do, of course, but rigid insulating boards can be used in places where fiberglass or rockwool batts would just get squashed and/or waterlogged.
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Hmm, appears rigid "stonewool" boards actually are available, and suitable for this sort of use:https://www.buildingscience.com/documents/building-science-insights-newsletters/bsi-096-hot-and-wet-dry …
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Seems like it still can get waterlogged, though, unlike plastic foams.
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