Metal roof repair in Mesa

That is not an impression, it is a consequence of what was built here. East Mesa holds one of the largest concentrations of park model and manufactured housing in Arizona, and on those homes the roof is metal by default. Not metal over a patio. Metal as the roof.

Those roofs share a set of characteristics that make them behave differently from anything else we work on. They are long, they are continuous, and they have very little pitch. Water on a roof with real fall is gone in seconds. Water on a park model roof moves slowly, pools in low spots and stays in contact with laps and fasteners for far longer, which gives it every opportunity to find a way in.

They also move a lot. A long unbroken panel run expands and contracts further over its length than a short one, so thermal cycling works fasteners harder here than on a small carport. The result is that the classic Valley failure, backed out screws and perished washers, shows up on these roofs earlier and across more of the surface at once.

The good news is that these are among the best candidates in the whole Valley for coating. A continuous membrane over a sound low slope metal deck handles standing water far better than a lapped panel system does, and it deals with the entire fastener population in one operation rather than chasing individual failures for years. On the right park model roof it is the single most sensible thing you can do.

The rest of Mesa is a different picture. Through the western and central grid it is large lot 1950s to 1970s ranch, with metal on add on carports, ramadas and enclosed Arizona rooms rather than on the house. Nearly every one of those additions was built at a different time from the house it is attached to, by somebody solving the flashing problem their own way, and that junction is where they leak.