Window - Sill Cracks _verified_

Best for: Cracks that don't go all the way through.

As a house shifts, the rectangular window opening can become slightly trapezoidal. This puts immense pressure on the sill, leading to diagonal stress cracks in masonry or pulling joints apart in wood. window sill cracks

A cracked windowsill is not the end of the world, but it is a warning light on your home's dashboard. Ignoring it invites water, bugs, mold, and heat loss. Best for: Cracks that don't go all the way through