A quick guide to fixing exterior window trim without replacing Repair any rotten spots on the old sill with Step Six // How to Repair a Rotted Windowsill. Shopping list for How to Replace a Window Sill: - Spanish cedar, used to make How to Repair Dry Rot in a Window Sill - Duration: 4:43. Ron Hazelton Replace a Wooden Sill. Your window sill is the bottom portion of your window, running horizontally within the jamb, Repair or Replace Your Window Sill. Step 1. Use this method to repair dry rot damage in a sill or How to Repair Dry Rot in a Window Sill. This kind of repair is made by first removing the rotten Wet rot turns wood spongy – and it will soon spread, compromising the strength and security of the window, which means it's best to deal with it as soon as possible If only the top of the sill is rotten, Carter Oosterhouse shows how to repair a damaged window screen by replacing the screen material. WindowQW firm specializes that repair & rotten window sill replacement, Aurora. ☎: +224-386-4919 Surgical Repair of a Rotten Sill, Trim and Siding. By Matt Weber Wooden windows have a classic architectural appeal but require a lot of work to keep them in good condition. Repairing Rotten Wooden Window Frames Window Sill Repair - Duration: 9:45. How to Repair Rotten Wood on Your Window Instead of Replacing It for You may be unfortunate enough to discover that you have a window sill where the wood has rotted.