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. 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. If sills are sandstone the stone tends to deteriorate with age exposure to rain snow and freeze. Stone windowsills add old world charm to many buildings.

How to repair sandstone window sills. Use a paintbrush to apply concrete bonding agent to the entire window sill. To avoid this check regularly for. Cracked or worn paintwork.

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