On Aug 26, 9:17 pm, willshak wrote:
on 8/26/2007 8:46 PM DerbyDad03 said the following:



I'm going to be replacing my windows soon. I plan to use minimal
expanding foam to fill the gaps.

The Great Stuff for windows (blue can, "Will not bow frames") says
uncured foam can be removed with acetone. Can I assume that the
acetone will not harm the vinyl?

I've been practicing trying to neatly fill a 1/8" gap with the
supplied straw and it's pretty tough, even after pinching the straw so
it will fit into the gap.

Do I need to put foam in a 1/8" (or smaller) gap?

(This is the side gap I expect since I'm told my windows will be 1/4"
narrower than the rough opening.)

Thanks!

In my short career as a house builder, all the gaps between rough
opening framing and the window or door framing was done with pieces of
glass wool insulation stuffed in with a putty knife. It is not the
material that provides insulation, but the air trapped within it.

--

Bill
In Hamptonburgh, NY
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Bill:

According to this thread, foam is much better than fiberglass when
replacing windows. (It's kind of a double-topic thread, but the foam
discussion is in there.)

http://www.vinyl-replacement-windows...highlight=foam

That's why I was experimenting with the Great Stuff. I can do a 1/4"
gap pretty well, but the 1/8" gaps are pretty tough.

(BTW - I asked my question at that site also, but getting a response
is hit or miss. Some questions get answered within minutes, some go
days without being touched.)