Simply put pitch is expressed as rise over run just as the grade is simply this fraction expressed as a percentage.
Minimum roof pitch ontario.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Framing any roof but particularly a gable roof low slope roof and cathedral ceilign roofs requires collar ties rafter ties and possibly a structural ridge beam to support the roof and to.
2 eave protection is not required.
2 see sentence 9 26 3 1 3.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
There is no fabrication of roof trusses required.
The chief reason for having a roof pitch is to redirect water and snow away from the roof and avoid any percolation that might result from stagnation of water on the roof.
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.
The ontario building code required eave protection 9 26 5 1.
17 jul the text will explain what is considered the minimum slope for standing seam metal roof.
My reasoning for this is that all that is required is a simple beam.
Notes to table 9 26 3 1.
In roofing it is expressed in inches of vertical rise over inches of horizontal run.
3 profiled metal roof cladding systems specifically designed for low slope applications are.
The roof joists can be fixed spanning directly between wall plates.
Roof framing suggestions canadian guidelines.
Metal roof experts in ontario toronto canada.
This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide.
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.
Importance of a roof pitch.
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.
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.
You could also opt for a pvc flat roofing membrane.
Basically low slope standing seam metal roof is the kind of rooftop used on low slope pitches.
There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch.
The minimum roof pitch is also subject to the standards set forth by the various building codes used in the respective regions.
Blog minimum slope for standing seam metal roof.
Which is the easiest shed roof pitch to build.
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.
1 see sentence 9 26 3 1 2.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
