Repair Water Damaged Wood Window Sill

A window sill is the bottom portion of the window and usually but not always has a lip that overhangs the trim molding and over time these can get damaged or even rot.

Repair water damaged wood window sill.

Rot moving up vertical trim boards. Sand the wood with a fine grit sandpaper. They have direct water exposure from the outside and sometimes condensation forms on. But with the magic of a good wood epoxy you can save damaged wood like this and make it look like new.

Most window sash and sill damage is caused by moisture in the form of condensation getting into the wooden window sill. Wood that has been exposed to the sun s destructive rays for years without a protective layer of paint can begin to weather so badly that it may appear to be beyond saving. Trim the back edge of the new sill as needed so that its lower edge fits tightly against the siding and its back edge fits against the old wood. Where the damage in the photo above is large it fortunately has not extended to either side of the vertical trim board.

What causes window sash damage. Condensation forms on the windows when the temperature outside cools down and in return lowers the temperature of the glass on your window. How to refinish a stained water damaged window sash. Some paint can remain on the sills but it must.

Repair rotted window sill. Oxalic acid wood bleach. While most wood rot starts at the window sill the length of time the damage is ignored will affect the amount of damage that needs to be repaired. Drill pilot holes every 16 inches or so through the new sill s front and back edges.

Run a bead of waterproof marine grade adhesive along the old sill. A water damaged window sill can however be brought back to its best with a minimum of knowledge or know how. If you ve got badly weathered window sills you re not alone. Actual footage from a job repairing water damaged window sills.

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. Repairing window sills isn t a hard diy and i try to share simple ways to make diy improvements to your home.