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.

If sills are sandstone the stone tends to deteriorate with age exposure to rain snow and freeze. As this may. Window sills are designed to divert water away from the house and as a result they get a battering from the weather over time wooden sills can rot and concrete window sills can develop cracks. Apply a 3 8 inch thick layer of concrete all over the sill with a trowel following any contours to mimic its original shape.

Puddles of water collecting on the window sill. Resurface stained or cracked concrete window sills with new concrete. How to repair sandstone window sills. Repairing a woden sill.

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. Use a paintbrush to apply concrete bonding agent to the entire window sill. Cracked or worn paintwork. 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.