How To Repair A Rotted Exterior Window Sill ((full)) (2027)

Wear safety glasses, a dust mask (N95), and work gloves. Rotted wood often harbors mold or mildew.

Once the new sill is installed, make sure to seal it to prevent water from seeping in. Apply a bead of caulk around the edges of the sill, making sure to cover any gaps or holes. Use a high-quality exterior caulk that's designed to withstand the elements. how to repair a rotted exterior window sill

Before installing the new sill, make sure the area is clean and dry. Remove any old adhesive or debris, and sand the area to smooth out any rough spots. This will ensure a secure bond between the new sill and the wall. Wear safety glasses, a dust mask (N95), and work gloves