Crack In Window Sill __exclusive__ Jun 2026

This is the most common enemy of wooden sills. If the paint or sealant has chipped away, rain and humidity seep into the wood. The wood swells with moisture and then shrinks as it dries, causing the fibers to separate and crack. If the wood feels soft or spongy, you aren't just dealing with a crack—you’re dealing with rot.

: "Thermal shock" from sudden heat or cold (e.g., turning on radiators in winter) can cause materials to expand and contract, leading to splits. crack in window sill