Repair Water Damaged Interior Window Sill

Using a paint scraper remove the paint from the windowsill where there is water damage.

Repair water damaged interior window sill.

Sand the sash by hand with a folded piece of 80 grit sandpaper. Chisel these out with a flathead screwdriver or small wood chisel. Mix several drops of oil free soap with warm water until it foams. After the damaged wood has been removed clean up the window casings.

Dry the wood with a microfiber cloth. Then we used a hammer and banged popped the sill upwards being careful to avoid any further damage. Finish removing all of the old finish with the. Instructions asses the damage to the window sill prep your work area sand away water damage wood stabilize remove and replace rotted wood bleach out the water stains sand and clean the remaining sill re stain the window sill clear coat the window sill.

2 remove soft rotten spots from the sill. We pulled out the rest of the nails that were left behind. First we ran a cutting blade this is my favorite caulk removing tool. Restoring a sill ranges from the application of toothpaste and baking soda for water stains to the more labor intensive process of repairing rotting wood with epoxy primer and wood filler.

Actual footage from a job repairing water damaged window sills. Scrub with authority using strokes parallel with the grain only. Around all the edges including between the underneath trim and the window sill. A water damaged window sill can however be brought back to its best with a minimum of knowledge or know how.

Wipe down the window casings to remove the oil and dirt. Step 3 repair the window casings.