This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide.
Minimum roof pitch ontario.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
Notes to table 9 26 3 1.
In roofing it is expressed in inches of vertical rise over inches of horizontal run.
I always recommend at least a minimum pitch of 1 in 40.
There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12.
My reasoning for this is that all that is required is a simple beam.
Which is the easiest shed roof pitch to build.
So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum.
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.
Let s first define the terms.
A 4 12 pitch being 4 inches of vertical rise over one foot or 12 inches of horizontal run.
Importance of a roof pitch.
In my view it has to be the flat roof with a nominal slope.
Blog minimum slope for standing seam metal roof.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Roof framing suggestions canadian guidelines.
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.
17 jul the text will explain what is considered the minimum slope for standing seam metal roof.
2 see sentence 9 26 3 1 3.
2 eave protection is not required.
There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch.
The roof joists can be fixed spanning directly between wall plates.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Simply put pitch is expressed as rise over run just as the grade is simply this fraction expressed as a percentage.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
3 profiled metal roof cladding systems specifically designed for low slope applications are.
Basically low slope standing seam metal roof is the kind of rooftop used on low slope pitches.
Required eave protection 1 except as provided in sentence 2 eave protection shall be provided on shingle shake or tile roofs 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 face of the exterior wall.
The ontario building code required eave protection 9 26 5 1.
Metal roof experts in ontario toronto canada.
There is no fabrication of roof trusses required.
You could also opt for a pvc flat roofing membrane.
