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iceman11
spay foam insulation
iceman11

has anyone had any experience with filling a wall cavity with the "great stuff window & door" type insulation?
I have a couple of areas with drywall over furring strips on block walls. I was thinking of drilling holes in the drywall approximately every 16" vertically, and squirting in the insulation for a couple of seconds. I would then wait about 1/2 hour, move up to the next hole, and repeat. I could put the holes closer, and use them as a gauge to see how much expansion I get. I have emailed the manufacturer and got no reply (probably not recommended by them).
any ideas or suggestions?
thanks

HandyAndyInMtAiry
Re: spay foam insulation
HandyAndyInMtAiry

That would be a waste of time and material. There will still be a lot of space in the cavity that will not be covered. And if you are using it from the small can, it will cost a small fortune. You will then have to go back and patch all the holes, and deal with the expansion of the foam that is causing the sheetrock to buckle.

It would be better to remove the `sheetrock, use foam board the same depth as your furring strips, cover that with a moisture barrier, tuck tape all the seams, and then put new sheetrock up. Sheetrock is cheap in comparison. You will have a much better outcome and not waste your money.

Handy Andy in Mt Airy

A. Spruce
Re: spay foam insulation
A. Spruce
HandyAndyInMtAiry wrote:

That would be a waste of time and material. There will still be a lot of space in the cavity that will not be covered. And if you are using it from the small can, it will cost a small fortune. You will then have to go back and patch all the holes, and deal with the expansion of the foam that is causing the sheetrock to buckle.

It would be better to remove the `sheetrock, use foam board the same depth as your furring strips, cover that with a moisture barrier, tuck tape all the seams, and then put new sheetrock up. Sheetrock is cheap in comparison. You will have a much better outcome and not waste your money.

Handy Andy in Mt Airy

X2

It is always a bad idea to improperly use products

ordjen
Re: spay foam insulation
ordjen

The Great Stuff in the red can will also expand with such force, that it will bow out your drywall!

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