Fix Cracked Window Sill

Step 1 use a putty knife or a paint scraper to remove the peeling and cracked paint.

Fix cracked window sill.

Sand the surface with a 100 grit sanding sponge. See below for tools and a shoppin. Switch to a 220 grit sanding sponge to finish off with a very smooth surface. Caulk tube versions are easiest to use just squeeze the sealer into the crack then smooth it with a plastic spatula or putty knife and peel off the tape.

Step 1 fix any small or medium cracks in your concrete window sill with caulk. A split cracked or simply weathered window sill can detract from an otherwise beautiful window. Chip says apply painter s tape around the edges of each crack. If there is not one there you may want to push up the cracked sill and install a skirting board to help support the sill.

Check for sill movement such as a crack where one side has settled or is down farther than the other side causing a crown and a crack. In a disposable container mix up your batch of liquidwood remember the 1 to 1 proportions and let it setup for about 15 minutes. Spread and flatten the caulk with a small putty knife. This old house general contractor tom silva shares some tricks of the trade for installing a new long lasting windowsill.

Repairing window sill damage is typically simple. Sometimes a skirting trim or board is installed under a sill like this to help support the sill. You will need to raise one side or the other with plastic. Then we used a hammer and banged popped the sill upwards being careful to avoid any further damage.

Do this before trying to fill the crack with any kind of filler. Other sill repairs can extend from basic maintenance to reconstruction of the sill. I prefer using a glue brush to help the epoxy work down into cracks and crevices. Scrape away any mess with the edge of the knife.

The sill or lower horizontal wood plate extends into the room creating a target for impacts and other damaging factors. Once it is ready you can apply it to the surfaces that require stabilization and repair. With any luck this re work may keep the crack closed up. We pulled out the rest of the nails that were left behind.

Repairing weathered sill finishes is simply a matter of sanding and repainting. Fit the narrow tip of a bottle of silicone latex caulk into each crack and overfill it by about inch.