How To Fix Cracked Window Sill

Sand the sill with 100 grit paper to smooth the surface for priming.

How to fix cracked window sill. Scrape the sill with a metal scraper to remove chipped or peeling paint. Using a small putty knife starting at the window smooth the caulking flush to the sill. Fix any small or medium cracks in your concrete window sill with caulk. First we ran a cutting blade this is my favorite caulk removing tool around all the edges including between the underneath trim and the window sill.

Then we used a hammer and banged popped the sill upwards being careful to avoid any further damage. 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. Remove as much concrete debris as possible. It is important to prevent water moisture from getting under your window this is a short video to show how easy it is to seal up the cracks in your concret.

Step 1 clean the surface. Use a random orbit sander for the best results. Remove any existing paint and dirt first from the area by scraping and wiping the area down with a rag moistened with tsp. Remove the excess material build up on the putty knife.

Any wood that is loose or rattling. Sometimes a skirting trim or board is installed under a sill like this to help support the sill. Switch to a 220 grit sanding sponge to finish off with a very smooth surface. We pulled out the rest of the nails that were left behind.

Sand the surface with a 100 grit sanding sponge. Resist the urge to keep touching and fiddling with the look of the smoothed caulking you will probably make it look worse. How to repair a concrete window sill preparation. Do this before trying to fill the crack with any kind of filler.

Dig out damaged wood image copyright. Finishing the mortar joint. Step 1 use a putty knife or a paint scraper to remove the peeling and cracked paint. Rub the surface of any and all damaged areas with a stiff brush.

How to repair weathered wood sills. Fit the narrow tip. With any luck this re work may keep the crack closed up.