And be sure to use an exterior-grade caulk. I recommend either 100% silicone sealant or a ... creating tension between the sash and window frame that blocks the passage of air.

Use Window Film Kits. Apply clear plastic shrink film to create an insulating air barrier. Start by attaching double-sided tape around the window frame, carefully apply the plastic film, and use a ...

Around the window, behind the sill and frame, ... Use a clear caulk that’s labeled as paintable, such as Dap’s alex plus clear acrylic caulk with silicone ($4.28 a tube at Home Depot).

A man has shared a hack to "winter-proof" your windows, just by adjusting a secret button in the window frame Credit: Instagram/@simplecreative2023. 2.