External Concrete Window Sill Repair New! Jun 2026

Concrete needs moisture to cure properly. If it dries too fast, it will crack.

This guide covers damage from minor chips and cracks to spalling (surface flaking) caused by freeze-thaw cycles. external concrete window sill repair

: Mimic the original "drip groove" (the undercut on the bottom of the sill) to ensure water continues to fall away from the building rather than running down the wall. Phase III: Curing and Finishing Concrete needs moisture to cure properly

This guide covers everything you need to know about assessing the damage and restoring your sills to a "like-new" condition. external concrete window sill repair