Rotted Window Sill Repair ((top)) Jun 2026

In most cases, you don’t need to replace the entire window. You can repair a rotted sill for a fraction of the cost.

Disclaimer: If the rot has spread into the window side jambs or the structural framing of the wall, it is best to consult a professional contractor. rotted window sill repair

Finish with 120-grit sandpaper to create a smooth surface ready for paint. 5. Prime and Paint Wipe away all sanding dust with a tacky cloth. In most cases, you don’t need to replace the entire window

Apply the liberally to the remaining exposed area. It soaks into the fibers, polymerizing the rot. Let it cure as directed (usually 2–4 hours). This stops the rot from spreading. In most cases