I had a prehung door done today. The door is in place and
it isn't going anywhere. The installer is a friend. He screwed up and I'll fix this by effort and with your guidance. FYI, the brick landing is way off level, which makes everything level look wacky.
The aluminum threshold has a minimum @1/16" gap between it and the rapid-setting cement threshold installed underneath and 1/16" rising to 3/16 for the last 7" of its run where the cement threshold is not level.
I need something to fill this gap. Across the 1/16" deficieny, I am thinking an epoxy, polyurethane or other compound shot underneath the aluminum might do. In the last 7" of the threshold where the gap widens to 3/16"-- and I fear weighted flexing may result in distortion of the threshold--my first notion is one of the fillers already mentioned supplemented by composite shims that the fillers fix in place.
My requirements for a filler are UV toleration and/or paintability, duration, waterproof and minimal flexibility.
The outer lip of the rapid-setting cement sill where it thins from the main body of the pour shows numerous cracks as pictured. If I could just coat the sill with something to prevent its further deterioration and improve water resistance, I will. Any good ideas?
Through a tedious attack with a diamond saw and diamond grinder, I could try to cut back as much of the lip as possible to reach the "apparently" ( or at least comparably) sound main body of the pour. Note, without X-Ray vision, seeing through the cement sill is not going to work. If I could cut/grind/carefully break the unsound lip material away, a new lip of concrete could be poured in place of the removed material. Because the door and jamb are in place and obstructing my access, this will be a challenging task.
I know this entire situation is an abortion. But life moves on. Don't worry, I'm not thinking of changing my screen name to "Lucky".
Any and all ideas are appreciated.