I am working on an enclosed porch that is built on a floating slab.(No footing under slab). The windows are storm windows that are caulked and screwed tightly to the frame. They have been cracking I think because of the frost heave. I want to replace all the windows with vinyl replacement windows. I was considering ordering them an inch smaller than the rough opening and using some soft foam cushon padding to fill to fill in the gap. Will this work ? Is there a better way?
John Keller