Cement Door Sill Repair

Paint or stain the new door sill.

Cement door sill repair.

Position the old door sill on the new sill and trace around it. We ve been having some issues with water leaking into our basement under our front door. Fit the new door sill in place under the door frame. If it fits apply liquid nails glue to the concrete and attach the threshold.

Cut the new door sill to size and bevel the outer edge. Remove all debris from the concrete slab. If desired protect and liven up a sill with a metal sill cover which wraps around the front of the sill. The aluminum door threshold should sit level on the sill and join to it with a waterproof flexible and adhesive sealant polyurethane.

Tap it snugly into position using a rubber mallet. Lift the threshold out and drill 1 1 2 inch deep holes at each drill tip mark on the concrete. 2 mix a moderate amount of liquid detergent with 1 quart of water in a. Hold the new door sill in place with construction adhesive and fasteners.

Drive a new 3 16 by 1 inch concrete anchor into each of the holes with a hammer. If i raise the concrete pour mounting the sill i might be able to cantilever and extend the lip of the sill about 75 1 into the air over the exterior brick landing. Cut it with a hacksaw. If it prevents the door from closing comfortably you can plane down the door or lower the threshold.

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 there s carpeting trim the carpet where frayed material hangs loosely. Lay a bead of caulk along what will be the back edge of the threshold. Install a cover alone or purchase a cover and sill combination.

We have a metal threshold over a concrete sill and our front porch is a concrete slab about 4 x6. When the saddle is in place restore the door jamb adding calk so that it fits nicely. Remove the old door sill from beneath the door frame. Caulk around the outside of the door sill.