Rotted Window Sill Repair Jun 2026

Sand the patch flat and flush with the surrounding wood using 80-grit sandpaper.

If the wood hardener or epoxy isn't fully cured, you trap solvents inside. The paint will blister within three months. Wait the full manufacturer’s cure time—even if it means leaving the window exposed for a day. rotted window sill repair

Fill the screw holes and minor joints with exterior wood filler or epoxy. Sand the patch flat and flush with the