Replace Window Sill Inside

Re install trims on the sides of the window and under the sill.

Replace window sill inside.

How to replace an interior window sill. Even if the window doesn t leak water condensation takes a toll on the sill. This project gives you step by step instructions for how to replace a window insert or pocket window from the exterior of a house. Cut sill adapter.

Don t confuse it with the stool or the molding on the inside of the window that gives it a finished look. Replace only the existing sashes with smaller windows that fit inside the existing frames. 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.

This old house general contractor tom silva shares some tricks of the trade for installing a new long lasting windowsill. Wooden sills have a tough time standing up to the elements year in and year out. The following are the steps for window sill replacement. If your sill is rotting or falling apart replace it with these simple steps.

The most important step in the window replacement process happens long before installation day. The stool is higher than the sill and like the stops would throw off your measurements. Sink your nails with a nail set. To install these you must strip the window opening down to its rough framing inside and out.

Sills are often sloped to divert water away from a home s interior. Repairing window sills isn t a hard diy and i try to share simple ways to make diy improvements to your home. Tap the new sill into place using a rubber mallet. Window sill damage is common.

It can cause it to rot warp or crack. Nail finish nails at each back corner and along the back every 12 inches. 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. Measure the height from the bottom of the window to the sill to size the sill adapter.

It is simple to replace the window sill without removing the woodwork or interior window sash. Nail a finish nail 1 2 inch from the inside window casing on each side. Your window sill is the bottom portion of your window running horizontally within the jamb resting against the outside of the window sash.