However below 4 12 a superior underlay is required.
Minimum roof slope bc.
3 profiled metal roof cladding systems specifically designed for low slope applications are.
2 see sentence 9 26 3 1 3.
The code provides minimum slopes for various types of roofing in table 9 27 3 a.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
There are no minimum slopes given for gutters and this becomes a separate issue.
Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.
1 see sentence 9 26 3 1 2.
Cedar is available down to 4 12 for shakes and 3 12 for shingles.
To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.
British columbia building code 2018 division b 9 26 2 4.
Type of roofing minimum slope maximum slope asphalt shingles low slope application 1 in 6 no limit.
It further gives installation methods which it considers will ensure acceptable performance at these minimum slopes.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
There are fewer options when the roof slope approaches 2 12.
Steep pitch it is difficult to safely walk on a roof when the slope is steeper than 7 12.
The profile refers to the shape the metal sheets take when they bend to.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
The values given here.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
Notes to table 9 26 3 1.
Minimum pitch for metal roof.
Asphalt shingles can be applied as low as 2 12.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
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.
