Cement Door Sill Replacement

Position the old door sill on the new sill and trace around it.

Cement door sill replacement.

Most exterior thresholds also have a sill beneath them. We have a metal threshold over a concrete sill and our front porch is a concrete slab about 4 x6. Hold the new door sill in place with construction adhesive and fasteners. Paint or stain the new door sill.

Door thresholds come in a variety of materials such as wood marble and metal and make the transition from doorway to floor smooth and easy. Learn how to install the threshold on a concrete slab floor employing varying methods that include the use of screws or fasteners and adhesives. If your threshold is in rough shape replace it. Fit the new door sill in place under the door frame.

Caulk around the outside of the door sill. Cut the new door sill to size and bevel the outer edge. It looks like a massive undertaking to replace the whole sill and my new door frame and sill will fit into the opening with merely grinding down the hump on the cement sill. There are a number of weatherproofing issues we need to address but the most urgent is the concrete sill under the door which has been crumbling for a while and presumably is the source of our leak.

If the threshold is rotted the sill probably is too. Thresholds come in wood and metal both of which come with a rubber gasket for sealing out the cold. Replace the metal.