Discovering a cracked pane of glass in one of your ... and quickly applied to the pane to seal and stabilize the crack so that it’s weatherproof and the window is secured from additional breakage.

“Time ages all things, including product seals, caulk ... sashes (the interior frames that hold the glass). Measure the bottom of the lower window sash and the top of the upper window sash.

but another option is a window insulation kit. With these kits, you seal off the entire window with a plastic film, not just the parts where there are gaps. But this isn’t the best option if you ...