A zero-carbon housing stock is going to make for interesting times.https://twitter.com/AyoCaesar/status/1195607820584079360 …
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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to my understanding, such insulation isn't within code in commercial or multistory buildings, but I don't know this for sure
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