How To Repair Window Sill Jun 2026

Exterior-grade primer, high-quality exterior paint, and weatherproof caulk. Step-by-Step Window Sill Repair 1. Inspect and Probe the Damage

Allow the filler to cure completely (typically 24 hours, though some products set in minutes). how to repair window sill

Sills that are structurally sound but look ugly. The wood feels hard when you poke it with a screwdriver. high-quality exterior paint

Is it an or a more modern composite/plastic ? how to repair window sill

To repair a window sill, you'll need:

I can tell you which material (Epoxy, Bondo, or a new wood block) will work best for your specific case. Rotted window sill on old wooden window - best option?

A repair that lasts requires stopping the water.