Minimal expansion foam probably won t work for this area.
Insulating window weight pockets when installing replacement windows.
Do not drill any holes.
Use foil tape to seal the joint between the window jamb and foam insulation.
Even if a house has been insulated with pour in pump in or foam insulation the weight pockets are left open for the weights to operate.
This house is a 1917 single brick veneer exterior lath and plaster interior the wall is i believe open from attic to basement.
A few days later i got the same question so i decided to compile my response into an article below.
When the old window is removed this will reveal a piece of the jamb that is held in by 2 screws.
Use a hammer and pry bar to carefully remove the wood trim from around the inside of the window exposing the sash weight pockets.
Apply insulating foam sealant between window and rough opening.
If you remove the inside jamb to expose the pockets and install a wider window this isn t a problem.
Shim four corners and check window for plumb.
In this video this old house general contractor tom silva explains how to insulate a window with sash weights.
Best way to insulate around a replacement window last week a visitor to my site asked me about the best way to insulate around a replacement window.
1 use hammer and pry bar to remove the molding from around the window.
Remove the weight and insulate through the pocket.
Remove these screws and you will be able to access the weight pockets.
Easily insulate the pockets of your old windows when replacement windows have been installed.
How to install window replacement duration.
Insulating behind the rough opening.
Stack strips to completely fill the void.
The lath and plaster is flush with the window rough opening.
I ve had some difficulty with doing my first solo window replacement re.
Place corner bead of sealant around perimeter of window frame where new frame contacts original window frame.
I discovered that there were sash weight pockets behind the ro.
Cut strips of foil faced rigid foam insulation to fit into the weight pockets.
Caulk gap on sides and top.
2 cut a strip of foil faced rigid foam insulation to fit snugly into the space between the side jamb and plaster or drywall.
Insert screws in pre drilled holes in window frame.
Now that i have begun the process of removing the trim i am finding it to be perhaps more work than it is worth.