My shop addition (21'x60' added on to an existing 40'x60') has been complete for a year and after many trips by the contractor it still leaks at the windows. I do want to mention that of the 21x60 feet, 21x24 is for the machinery. Installed radiant tubes in the concrete slab and heavily insulated walls and ceiling. The remaining 21x36 is finished space with carpeting, drywall, pool table, 9 pinballs, juke box, piano, saxophone, popcorn machine,etc. In other words I cannot tolerate leaks. BTW, metal siding. Everyone of the six windows has had some degree of leakage. The manufacturer admits that using "C" channels and flashing is not enough to seal the windows. Seems like the top "C" channel catches the water but when it goes down the side "C"'s there is no incentive for the water to jump back out to the exterior of the metal siding. The only solution has been to add more and more caulking around the windows.
I would like to take some spare siding (corrugated metal) and make simple bent awnings over each window so the only place I would ever have to caulk would be the 'awning-siding' interface. I would like to, for example, place a 6 foot long awning a few inches above one of the 5 foot windows. If it were not for the corrugations I would simply bend a 30° to 45° angle in a
10"x72" strip about 2 inches in from the long edge. BUT because of the corrugations this is not a simple bend. Seems like my choices are to make it up from 2 pieces, scribed together, and MIG them together. Of course I would have to remove galvanizing and repaint the whole assembly. Lots of work times 6 windows.Anybody have a better idea?
Thanks,
Ivan Vegvary, in wet Oregon