Fix a rotted windowsill and help prevent a relapse.
Fix window sill rot.
Rot that occurs deep inside of the sill is more difficult to repair.
Set the depth of the router bit to create a stepped patch to fit into the window sill.
Just use a couple of nails to hold each part in until you re certain the fit is good.
How to repair a rotted windowsill remove the side casings.
Make a plumb cut flush with the sheathing along the length of the rotten sill.
Surround the damaged area with wood strips to serve as a router guide.
Most sills are designed with a few degrees of downward slope to help them shed water.
Most likely you will have to.
How to replace exterior rotted wood window sill step 1 getting started.
Saw off the old sill.
Depending on how rotted your window sill is it may be an easy or more difficult job.
Step 2 removing the window sill.
These are your first steps before you can remove the window sill.
The casing comes off to clear the way for removing the old sill.
Start refitting the trim putting it back in the reverse order to which you removed it.
First cut the angle on your sill.
A circular saw with.
If the casings are rotting as.