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Spray foam insulation on basement concrete walls.

parkjk2a's picture

If I have closed cell foam sprayed on to my basement concrete walls, do I have to frame them out first?  I'm not finishing the basement, I just need to insulate it.  The basement is only 4 feet high but I want it included in the conditioned space instead of insulating the floor of the house.  So can I get a continuous 3" layer of foam on the walls without framing?

Depending on the (post #213771, reply #1 of 2)

Depending on the circumstances, the type of foam, and local codes, you may be required to cover the foam with drywall or some other fire barrier.


Of all the preposterous assumptions of humanity over humanity, nothing exceeds most of the criticisms made on the habits of the poor by the well-housed, well-warmed, and well-fed.  --Herman Melville

You do not need any framing, (post #213771, reply #2 of 2)

You do not need any framing, but as Dan mentioned you may need some type of fireproof coating.  This can be plywood, sheet metal, drywall, or a specially formulated paint on product.  If you find that your local code official insists on fireproofing the foam install, also ask around your insulation contractor about options.  I think Dow may now have a closed cell foam that is fire rated after curing.