Step by Step ProjectsTips from the ProsAffordable Remodels
Is expanding spray-foam the best product to use around new replacement windows prior to installing interior stops?
It's much better than stuffing fiberglass insulation which doesn't work well in that situation.
The foam does 2 main things :
2- seals drafts
In some cases it will have slight advantage as an adhesive.
Just have to watch for which expansion rate is used ... too much of high expanding foam will push in the frames. :eek: