Re: Filling window weight pockets with foam
jack, hes retired
personally i hate the small throw away cans, their a total pain in the but for controlling the flow of the foam as to how much comes out. if i do use them its for spots where being neat doesnt matter, just filling large voids
i use a foam gun which you simply change the can, much more control and they can be cleaned if they jamb up.
as for the topic though, put small amounts of foam in at a time letting it expand and cure a bit, then put a little more in let expand and so on. this way you greatly reduce the chance of bowing the jamb. this is the method i use for windows and door installs
fire up the saw and make some dust