Do you notice how to replace a window sill? You will have to have a piece of wood of the same width and thickness as the windowsill. You are removing the windowsill to take for comparison when the purchase can save time and confusion. Look at the other parts of the window while having the windowsill removed. Patch or replace other parts of the window that show damage or rot.
How to replace a window sill (wooden)?
Remove the horizontal molding at the bottom of the window directly below the threshold. Use a flat lever and a hammer to remove the molded part. Pry the wall molding, using the lever bar. Your way of working through the width of the window, moving the lever as you go.
Open the window leaf to the top. Cut around the edges of the window ledge with a knife to release any paint or putty that may hold the windowsill in place. Press against the bottom of the hearth with a hammer. Use the pry bar. Cut stubborn frames in half with a circular saw with the depth established in the thickness of the hearth. Remove the two pieces with the hammer.
Cut the sill of the new joint of the same length as the original. Sills are notched to fit the window frame. Use the sill of the original as a template to mark the ends of the hearth. Cut the notches with a jigsaw to get the best results.
Sand the windowsill in the background. Prime all surfaces of the new windowsill with an oil-based primer to seal the wood. Allow the primer to dry completely before proceeding with the installation.
Tap the windowsill back into place using a rubber mallet or hammer and the wooden block. Nail the sill of the sub sill with a hammer and finishing nails. Fill the nail hole with solvent-based wood putty. Let the filling dry and the sand down soft to mix with the surface surrounding the windowsill.
Seal the edges of the hearth with latex painter putty. Allow the putty to dry before applying the high gloss latex paint to complete the repair.
Tile a wooden sill window
If you have a plain wooden window sill in a bathroom or kitchen and want to be dressed, the standard approach is to add some decorative wood details. I tile a more interesting approach and one that may seem attractive in some rooms under it, where you usually put that setting. Bullnose tiles are finished and rounded along an edge which allows you to make an edge of the tiles that can tie the window in the other colors and patterns of tiles in the room.
Dull the wall under the windowsill, along its length with sandpaper. Hand sanded to as low as the height of your tiles. So if the tiles are 5 inches deep, sand about 5 inches below the floor along its length.
Measure the length of the floor. Find and mark the centre with a pencil.
Adhesive for placement 3 Spread on the back of a rounded edge tile, with a notched trowel.
Press the tile to the wall below the threshold, on one side of the center mark. Adjust it so that the unfinished side is just below the threshold and the finished edge is facing down.
Hang the remaining tiles along the edge in the same way, working from the center outward in both directions towards the ends. Self-spacing bumps on the sides of the tiles should keep them separate.
Hang as many chips as they fit in the hearth’s bottom. Stop when the last tile on each end is within a tile width from the end of the floor. Let the adhesive dry for 12 hours.
Put masking tape around the tile to protect the grout wall. Apply grout of the tiles with a rubber trowel, scraping on the surface of the ceramic. Press the grout into the spaces between. The excess slurry is collected with a damp sponge. Let stand for 24 hours.