To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.
Minimum pitch for metal roof canada.
Coal tar base gravelled 1 in 50 1 1 in 25.
After that the miimum pitch for metal panels depending on the methods used to join the panels.
Asphalt base gravelled 1 in 50 1 1 in 4.
Mum slope for structural metal panel roof systems should be 1 2 in 12 2 4 degrees.
Asphalt base without gravel 1 in 25.
Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.
Lap sealants shall be applied in accordance with the approved manufacturer s installation instructions.
You can often see such examples of use over metal decks.
Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.
Glass fibre reinforced polyester roofing panels.
The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12.
I e 4 inches of rise per 12 inches one foot of run.
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.
The national building code of canada 2005 has now clearly without doubt defined that a deck area is considered a roof and that the only acceptable standard for pvc membranes is cgsb 37 54 95.
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.
The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally.
The 1999 boca national building code and 1999 standard building code list the minimum slope for metal panel systems as 1 4 in 12 1 2 degrees.
If a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss the roof slope is said to be 4 12.
This recommendation con flicts with some manufacturers who list 1 4 in 12 1 2 degrees as an acceptable minimum slope.
