How To Reseal A Window Fixed [best] Jun 2026

Check the caulking between the outside window frame and your home’s siding. Gaps, cracks, or peeling here let water enter the wall cavity.

This is the hardest scenario. If you have condensation between the two panes of glass, The inert gas (argon/krypton) has escaped, and the desiccant inside the spacer is saturated. how to reseal a window fixed

On a windy day, hold a lit candle or incense stick near the edge of the window frame. If the smoke blows horizontally, you have an air leak. Check the caulking between the outside window frame

For fixed windows that don't open but still have a micro-gap around the sash, foam tape is the hero. If you have condensation between the two panes

Allow the area to dry completely. Do not skip this step; trapping moisture behind the new seal will cause it to fail prematurely. Step 3: Prep Deep Gaps (If Applicable) Inspect the depth of the gap around your fixed window.

For the best results, pick a dry day to complete this project. Most exterior sealants require temperatures between 40°F and 90°F (4°C to 32°C) to cure properly, and moisture will ruin the adhesion. Step 1: Remove the Old Sealant