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I have mentioned before that I have a basement under my garage. The walls are poured concrete, the floor is also concrete. The garage itself also has a concrete floor, and it gets very cold. Would it do any good to glue Styrofoam insulation to the ceiling of the basement, to help keep the garage floor warmer? The garage is heated. If so, what type of glue works best for adhering Styrofoam, the extruded pink stuff, to concrete?
Thanks Greg
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(10-17-2022, 11:58 AM)Gregor1 Wrote: I have mentioned before that I have a basement under my garage. The walls are poured concrete, the floor is also concrete. The garage itself also has a concrete floor, and it gets very cold. Would it do any good to glue Styrofoam insulation to the ceiling of the basement, to help keep the garage floor warmer? The garage is heated. If so, what type of glue works best for adhering Styrofoam, the extruded pink stuff, to concrete?
Thanks Greg
If the garage is heated and the basement is not, then putting insulation on the basement ceiling will definitely help keep the garage warmer. In order of priority, insulation is most beneficial on the ceiling, then the walls, and the floor last, so make sure the ceiling and walls are well insulated before spending money to insulate the floor.
John
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If I were solving your problem, I would install 3" by 2" pressure treated stringers on the floor, fill the spaces with the foam insulation, and 3/4" plywood over that. Then the flooring of your choice.
Or, indoor/outdoor carpeting.
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10-17-2022, 04:33 PM
(This post was last modified: 10-17-2022, 04:34 PM by Snipe Hunter.)
You can't have any exposed foam insulation unless it's fire rated. Usually foam is installed and covered with drywall or some sort of wood paneling. So make sure it has some sort of visible label that says it's for this purpose. I doubt you'll find it at the big box stores.
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(10-17-2022, 04:33 PM)Snipe Hunter Wrote: You can't have any exposed foam insulation unless it's fire rated. Usually foam is installed and covered with drywall or some sort of wood paneling. So make sure it has some sort of visible label that says it's for this purpose. I doubt you'll find it at the big box stores.
I think the foil faced foam sheets are fire rated. a few Home Depots around here stock that. Most don't, and Lowes doesn't. YMMV
Also, some of the spray foams are fire rated.
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Do I understand this correctly: you want to insulate the underside of the concrete garage floor to help keep it warmer? If true, I'm not sure what you want to do want to do will help all that much....but then I'm also not sure what you mean by very cold. Here's what I base that on: my shop (freestanding building, slab on grade, and heated) has a very cold floor even though it not exposed to an open area underneath. But this is speculation on my part, and the others certainly have a better grasp on it than I do.
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