Apply a 3 8 inch thick layer of concrete all over the sill with a trowel following any contours to mimic its original shape.
Repair cracked concrete window sill.
Repairing a woden sill.
Worn or loose joints.
To avoid this check regularly for.
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.
Puddles of water collecting on the window sill.
As this may.
How to repair sandstone window sills.
Use a paintbrush to apply concrete bonding agent to the entire window sill.
If sills are sandstone the stone tends to deteriorate with age exposure to rain snow and freeze.
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.