Concrete Sill Repair

Concrete window sills serve a dual purpose: they provide a clean, finished aesthetic to a building’s exterior, and they perform the critical function of shedding water away from the window frame and wall structure. Because they are horizontal surfaces exposed to the elements, they are among the first parts of a structure to show signs of wear. Over time, rain, snow, and freeze-thaw cycles can cause concrete sills to crack, chip, and spall. Ignoring this damage can lead to water infiltration, rot, and expensive structural repairs. Fortunately, with the right materials and a bit of patience, repairing a concrete sill is a manageable project for most homeowners.

Apply a concrete bonding agent to the old surface, then pour your new concrete mix (using a durable ratio like 4-2-1 rule if mixing yourself). concrete sill repair

Use a wire brush to remove loose debris, moss, and dirt [13]. Concrete window sills serve a dual purpose: they