Minimum metal roof slope depends on the roof profile building design climate and site location.
Low pitched standing seam metal roof.
They are also used on much steeper roofs.
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.
They can be used on roofs with pitches as low as 25 12.
Low slope metal roofs require less material which reduces the overall load on the building s structure.
What is the minimum pitch for a zinc roof.
The standard of lower pitch actually ranges between 1 12 to 5 12.
Low slope meta l roof is one of the lightest among other roofing.
These roofs are made from panels of aluminum or steel joined together in raised seams.
Tite loc and tite loc plus panels are factory formed to length and field seamed to a 90 lock tite loc or a 180 lock tite loc plus.
With low slope you want to consider the roof load.
The panels have been designed for application over a wide variety of substrates on roof slopes as low as 1 2 12 pitch.
We recommend 5 degrees however due to site conditions and execution.
Sig zinc and copper recommend that the minimum pitch for a standing seam zinc roof is five degrees with an absolute minimum of 3 degrees.
A 3 degree roof pitch means just over 50mm in every metre so over 3 metres you only have 150mm to play with.
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.
Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak.
There are however certain safety measures to be made when dealing with low slope standing seam metal roof.
Repeating cases of standing water in five to ten years can result in rust.
Anything above that will require you to put out higher cost because they are already considered as higher pitch.
2 5 12 to 19 12 pitches.
The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.
As you can see from illustration the roof changes pitch at the porch from a 9 12 to a 3 12 pitch.
Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.