10/09/2026
Before you buy a single tube of caulk, find out where the cold is actually coming from.
Run your hand along the glass, then the frame, then the sash. Moving air means a leak you can seal. But a pane that's cold in the middle and not at the edges is something else — the seal inside the glass has failed, and no amount of caulk or film will fix that one.
The full method, which fixes are permanent and which come off in spring, and the five mistakes that make a drafty window worse — inside.
https://argowindowrepair.com/blog/window/how-to-insulate-windows-for-winter-a-window-pros-guide-to-sealing-out-the-cold?utm_source=facebook&utm_campaign=facebook-nc