Low Pitch Steel Roof Leak

This provides a weathertight seal between all the gaps.

Low pitch steel roof leak.

A low pitched corrugated roof with many valleys is a problem. On a low pitch roof an end lap can easily leak though as water will be driven back up the sheets in strong wind. If these are damaged missing or applied incorrectly leaks could occur. There are some opinions that standing seam metal roof minimum slope is 12 but it increases the possibility of leaking on the few first days of snow arrival.

Metal roofs can handle lower pitches anywhere from 12 on up. If you look here at the lower slope roof you can see that we ve already put panel on it and installed z trim as we have been doing elsewhere on this project. Low slope metal roofs require less material which reduces the overall load on the building s structure. Fairly steep pitch roof an end lap will not leak providing there is sufficient lap.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Isolate areas when you run the hose. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. I would not contemplate trying to modify the existing roof.

Full length sheets should always be used where possible. If a leak is difficult to find enlist a helper and go up on the roof with a garden hose. Start low soaking the area just above where the leak appears in the house. Actually when a standing seam metal roof has a leak it is commonly at some type of flashing area.

But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch. Metal roofs also have seams but many manufacturers recommend connecting their panels with screws and sealant. The major issue is the low pitched valleys more that the roof itself. As well seams are often elevated at least 2 off the surface of the roof and thus away from moisture.

In my experience even low pitched kliplok roof with valleys are prone to leakage along the valleys. Failed sealant or butyl tape sealants and butyl tape are used to seal out water dirt and other debris that could compromise a metal roof. It s the same piece. Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak.