Q. My house was built in 1953. It was a ranch, until we enlarged it in 1996 to a Colonial. I just noticed that the sill in my original picture window has started to rot and the sills in the upstairs are spongy and rotting. I saw an episode on “This Old House” years ago where they cut the sills in half and replaced them, but I can’t remember how they replaced them. Help!
— RON POLK RON POLK