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Overview
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In this video, This Old House general contractor Tom Silva explains how to insulate window weight pockets.
Steps:
1. Use a hammer and pry bar to carefully remove the wood trim from around the inside of the window, exposing the sash-weight pockets.
2. Cut strips of foil-faced rigid foam insulation to fit into the weight pockets; stack strips to completely fill the void.
3. Use foil tape to seal the joint between the window jamb and foam insulation.
4. Replace the window trim. -
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1 to 2 hours per windows
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Tools
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Shopping List
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Difficulty: Easy to moderate
Removing and replacing the window trim is the only challenging part
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Tools List
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Flat pry bar,
used to remove the window trim Hammer, used to tap pry bar -
Utility knife,
for cutting the foam insulation
Shopping List
1. Foil-faced rigid foam insulation,
used to insulate weight pockets
2. Foil duct tape,
used to seal insulation
used to insulate weight pockets
2. Foil duct tape,
used to seal insulation














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