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Has anyone used a product like this yourself, and if so, what was your experience? (sh.itjust.works)
submitted 2 weeks ago by to c/asklemmy@lemmy.world
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It’s $545 for 36 cans on Amazon.

I need to insulate and air seal my basement ceiling and rim joist bays.

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[–] 24 points 2 weeks ago (2 children)

First of all why do you need it

Second of all don't buy fire barrier products from Amazon, your local hardware store or electrical supplier will have correctly rated and fresh product.

If you are doing this work as a contractor, get any building inspector you've met to tell you about the products they approve for this.

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  • [–] [S] 4 points 2 weeks ago (1 child)

    I need to insulate my basement ceiling and rim joist bays on a short budget.

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  • [–] 14 points 1 week ago

    Oh this will not fill as much volume as you need. This is for plugging holes into a garage or through some other fire rated wall.

    Rockwool insulation held up with string, and then poly sheeting stapled over that is probably the cheapest way to do it correctly with a high R value... Idk though I'm back to asking an inspector what they would accept, but I work construction so I speak to them. Your hardware store randos will point you in a better direction than me probably.

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