How To Repair A Rotted Exterior Window Sill Page

To remove the old sill, start by prying it away from the wall using a crowbar or a hammer. Be careful not to damage the surrounding area. Once the sill is removed, inspect the area for any signs of rot or damage. If you find any, make sure to address these issues before installing the new sill.

Putty knife, 5-in-1 painter’s tool, chisel, hammer, oscillating multi-tool (or handsaw), power drill, paintbrush, heat gun (optional), sandpaper (80-150 grit), vacuum. Materials: Wood hardener (liquid), two-part epoxy wood filler (not standard putty), exterior wood primer, exterior paint, caulk (painter's grade), plastic sheeting, painter's tape. how to repair a rotted exterior window sill

The wood is spongy throughout, the rot has spread into the wall studs, or the sill is structural and sagging. Professionals like Argo Window Repair estimate that simple epoxy repairs cost $150–$225, while full replacements can reach $750. Required Tools and Materials To remove the old sill, start by prying

Finally, add any finishing touches, such as painting or staining the sill to match the surrounding area. This will help to protect the sill from the elements and add a touch of curb appeal to your home. If you find any, make sure to address

: Excavate at least an inch beyond the last visible sign of rot to ensure all fungal spores are removed. Clean the area thoroughly of debris and old paint. 2. Stabilize the Base Rotted window sill repair with PC Products