Cement Door Sill Repair

Fit the new door sill in place under the door frame.

Cement door sill repair.

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. Lift the threshold out and drill 1 1 2 inch deep holes at each drill tip mark on the concrete. When the saddle is in place restore the door jamb adding calk so that it fits nicely. Position the old door sill on the new sill and trace around it.

Cut the new door sill to size and bevel the outer edge. Paint or stain the new door sill. Install a cover alone or purchase a cover and sill combination. Lay a bead of caulk along what will be the back edge of the threshold.

2 mix a moderate amount of liquid detergent with 1 quart of water in a. Remove the old door sill from beneath the door frame. Slide the threshold underneath the doorstops and position the notches you cut around the door jambs. If it fits apply liquid nails glue to the concrete and attach the threshold.

If it prevents the door from closing comfortably you can plane down the door or lower the threshold. Cut it with a hacksaw. If desired protect and liven up a sill with a metal sill cover which wraps around the front of the sill. We have a metal threshold over a concrete sill and our front porch is a concrete slab about 4 x6.

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. If there s carpeting trim the carpet where frayed material hangs loosely. We ve been having some issues with water leaking into our basement under our front door.

Then test the threshold for fit. Tap it snugly into position using a rubber mallet. Remove all debris from the concrete slab. The aluminum door threshold should sit level on the sill and join to it with a waterproof flexible and adhesive sealant polyurethane.