Metal Roof Slope Transition

Minimum metal roof slope depends on the roof profile building design climate and site location.

Metal roof slope transition.

The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope. After bottom roofing panels have been installed set one piece of transition flashing down where the top portion non hemmed of the transition flashing lies flat on the upper roof. This is a fairly common roof detail. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Install bottom roofing panels first. We need to do something where that change happens so the panels can go down and water can come off hit the lower slope and come off the roof. We re going to do a pitch transition or change. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems.

The roof plane goes from one pitch to a lower pitch. See the illustration below. Measure 1 1 2 from bottom edge of transition flashing. You ll have a steeper part of your roof turning into a lower slope so there s a steeper pitch up top and a lower pitch on the bottom.

No sales pitch or other fluff. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope. Masterrib is a 36 w.

Repeat step 3 on the opposite end of the roof transition. A roof pitch transition is a line in the roof plane that changes pitch. Fits a36 c4 5 4 steel c channel 1 584 in. Pitch transitions are a common roof detail.