In the process of renovating the living room, we found water damage by the sliding door. We had received advice on how it was coming under the door (which had only been installed a couple of years ago), but decided to call Sobol (who we have dealt with for 10 years, but had been unavailable to replace the door when we had that done.) Archie came over promptly, and showed us what the problem was: the installers had capped the sliding door (and this applied also to the windows), covering the iron lintel. Condensation then collects on the lintel (rusts it) and travels down inside the capping and to the bottom, where it comes through the wall. He and his co-worker removed the capping, and sealed the door (as well as three windows where we had had the same problem). Bottom line: installers put in this smart-looking capping all around on the outside when it should never be put on doors and windows with iron lintels: these should be left exposed.
Sobol know how to do things properly.