I am replacing much of a rotted window sill (in a Victorian built in 1910) The stool (wood over the sill) is fine, and ideally I'd want to extract the sill entirely and put in new wood.
Before:
I've substantially removed a little part of the sill on the left side and used an oscillating tool to loosen about 2" deep under the stool for about 8 inches, but the sill refuses to budge.
I drove in some screws in an effort to use a prybar to pull the sill out - to no avail.
So I just plunge-cut the rest of the front of the sill off with an oscillating tool
The only way I can see to extract the rest of the sill (so the right 90% looks like the 10% or so on the left) is by hacking away with an oscillating tool - very slow going.
I'd be grateful for tips on how to remove the entire sill efficiently, or on how to plane or rout out say 1/2 inch deep of the remaining sill so I can partially slip some new wood under the stool for the repair.
