Where the damage in the photo above is large it fortunately has not extended to either side of the vertical trim board.
Repair rotted window sill youtube.
If your sill is rotting or falling apart replace it with these simple steps.
Your window sill is the bottom portion of your window running horizontally within the jamb resting against the outside of the window sash.
For this project i used a solid piece of kleer cellular pvc sill that matches the profile and thickness of the other sills on the house.
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.
Window repair from wet rot.
See below for tools and a shoppin.
Repair rotted window sill.
A simple epoxy repair will do the trick if the rot is confined to a small area but if more than 10 percent of the sill is rotten the old sill should be cut off and replaced.
Rot moving up vertical trim boards.
How to fix a partially r.