Cracked or worn paintwork.
Repair cracked concrete window sill.
To avoid this check regularly for.
How to repair sandstone window sills.
Repairing a woden 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.
Resurface stained or cracked concrete window sills with new concrete.
Worn or loose joints.
Use a paintbrush to apply concrete bonding agent to the entire 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.
Stone windowsills add old world charm to many buildings.
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.