Repair Cracked Concrete Window Sill

With concrete and slate sills the exposure to the variations in temperature can cause cracks and crumbling water penetration can also weaken the joints.

Repair cracked concrete window sill. Apply a 3 8 inch thick layer of concrete all over the sill with a trowel following any contours to mimic its original shape. Rub off flaking paint or loose concrete along the crack with the wire brush and make sure to clean out any moss that may be growing inside. Stone windowsills add old world charm to many buildings. Worn or loose joints.

Puddles of water collecting on the window sill. Repairing a concrete window sill could appear to be a major job that s far beyond the skills of the average diyer but with the proper knowledge tools material and preparation you might find it s worth considering having a go yourself unless a complete rebuild is necessary. If sills are sandstone the stone tends to deteriorate with age exposure to rain snow and freeze. How to repair sandstone window sills.

As this may. Repairing a woden sill. Resurface stained or cracked concrete window sills with new concrete. Use a paintbrush to apply concrete bonding agent to the entire window sill.