Replace Window Sill Inside

This old house general contractor tom silva shares some tricks of the trade for installing a new long lasting windowsill.

Replace window sill inside.

Your window sill is the bottom portion of your window running horizontally within the jamb resting against the outside of the window sash. Don t confuse it with the stool or the molding on the inside of the window that gives it a finished look. Nail a finish nail 1 2 inch from the inside window casing on each side. How to replace an interior window sill.

Again if there is severe damage to the window sill either inside or out you will need to hire a professional to complete the job. Sink your nails with a nail set. See below for tools and a shoppin. Repairing window sills isn t a hard diy and i try to share simple ways to make diy improvements to your home.

If your window sill is sloped take the measurement from its highest point. These are the only option when the old window frame sill or jambs are rotted. Re install trims on the sides of the window and under the sill. Measure the height from the bottom of the window to the sill to size the sill adapter.

A window sill is the bottom portion of the window and usually but not always has a lip that overhangs the trim molding and over time these can get damaged or even rot. Measuring for replacements photo by russell kaye. Wooden sills have a tough time standing up to the elements year in and year out. Window sill damage is common.

Cut sill adapter. Nail finish nails at each back corner and along the back every 12 inches. Sills are often sloped to divert water away from a home s interior. It is simple to replace the window sill without removing the woodwork or interior window sash.

If your sill is rotting or falling apart replace it with these simple steps. The following are the steps for window sill replacement. It can cause it to rot warp or crack. To install these you must strip the window opening down to its rough framing inside and out.

The most important step in the window replacement process happens long before installation day. Even if the window doesn t leak water condensation takes a toll on the sill. The stool is higher than the sill and like the stops would throw off your measurements.