The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
Minimum roof slope alberta.
The minimum roof slope permitted for issuance of an asphalt shingle roofing warranty certificate is 4 12 1 3.
The values given here.
Minimum pitch for metal roof.
The minimum roof slope for metal roofs is dependent upon the roof profile.
Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.
Let us recap on the minimum roof pitch required for each type of roofing material.
Division b part 5 page 5 11 the national building code now dictates that all flat roof deck and balcony areas are considered roofs and when specifying a pvc.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.
Use a membrane roofing system for roof slopes less than 4 12 1 3.
Use a membrane roofing system for roof slopes less than 4 12 1 3.
The profile refers to the shape the metal sheets take when they bend to.
To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.
Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
The alberta building code.
With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
Cgsb ca cgsb 37 54 polyvinyl chloride roofing and waterproofing membrane national building code of canada 2005.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Extending from the edge of the roof a minimum of 900 mm up the roof slope to a line not less than 300 mm inside the inner.
Metal roof shingles require a minimum roof pitch of 3 12 or greater.
