Repair Water Damaged Interior Window Sill

Actual footage from a job repairing water damaged window sills.

Repair water damaged interior window sill.

Then we used a hammer and banged popped the sill upwards being careful to avoid any further damage. Sand the sash by hand with a folded piece of 80 grit sandpaper. A water damaged window sill can however be brought back to its best with a minimum of knowledge or know how. 2 remove soft rotten spots from the sill.

Wipe down the window casings to remove the oil and dirt. First we ran a cutting blade this is my favorite caulk removing tool. Finish removing all of the old finish with the. Step 3 repair the window casings.

Dry the wood with a microfiber cloth. Submerge a sponge in the soapy water and squeeze out the excess. After the damaged wood has been removed clean up the window casings. Around all the edges including between the underneath trim and the window sill.

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. 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. How to refinish a stained water damaged window sash 1. Mix several drops of oil free soap with warm water until it foams.

Chisel these out with a flathead screwdriver or small wood chisel. Scrub the window sash with a stiff wire brush.