Standing Seam Metal Roof Pitch

Speaking about standing seam metal roof slope it is a general and a self evident knowledge that the steeper it is the faster it is for snow rain or drain to come down the roof.

Standing seam metal roof pitch. You can often see such examples of use over metal decks. As you can see from illustration the roof changes pitch at the porch from a 9 12 to a 3 12 pitch. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs.

However there are many mechanically seamed standing seams that are very appropriate for lower pitch roofs usually down to about 1 4 12 most flat seam products will have soldered seams to make them watertight even on a flat roof. Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. By the way pitch is measured by picking any point on the roof place a level on it measure 12 out from that point this is called the run and then down to the roof surface from the bottom of the level this is called the rise to see how many inches the roof pitches over 12. Snap lock panel metal roofs are not advisable for roofs with a pitch of 2 12 or less 2 feet of vertical rise for every 12 feet of horizontal rise.

Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. For this sort of system the panels are secured to the roof using hidden clips and then a seaming machine is used to crimp the seams closed so they will be water tight. 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. Snap lock standing seams should not be used on roofs under 1 5 or 2 12.

Certain types of metal roofs do not lend themselves well to flatter or completely flat pitches. Unsuitable for flat roofs. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.