If the metal easily sinks into the wood, active rot is present.
This is the most critical step to ensuring the rot doesn't come back. rotted window sill repair
Extensive structural crumbling requires a partial or full sill replacement. Method 1: Repairing Minor Rot with Epoxy Wood Filler If the metal easily sinks into the wood,
Make two vertical relief cuts through the rotted section of the window sill using a reciprocating saw. rotted window sill repair