The minimum roof slope for metal roofs is dependent upon the roof profile.
Minimum roof slope bc.
The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.
There are no minimum slopes given for gutters and this becomes a separate issue.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
The profile refers to the shape the metal sheets take when they bend to.
Notes to table 9 26 3 1.
Asphalt shingles can be applied as low as 2 12.
The values given here.
Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
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.
3 profiled metal roof cladding systems specifically designed for low slope applications are.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
2 see sentence 9 26 3 1 3.
Steep pitch it is difficult to safely walk on a roof when the slope is steeper than 7 12.
Cedar is available down to 4 12 for shakes and 3 12 for shingles.
1 see sentence 9 26 3 1 2.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
It further gives installation methods which it considers will ensure acceptable performance at these minimum slopes.
There are fewer options when the roof slope approaches 2 12.
British columbia building code 2018 division b 9 26 2 4.
However below 4 12 a superior underlay is required.
Type of roofing minimum slope maximum slope asphalt shingles low slope application 1 in 6 no limit.
2 asphalt and gravel or coal tar and gravel roofs may be constructed with lower slopes than required in sentence 1 when effective drainage is provided by roof drains located at the lowest points on the roofs.
With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
