The slope of a roof often referred to as the pitch is determined by rise over run the roof s vertical rise in inches for every twelve inches of horizontal length the run.
Steep pitch roof shingles.
High and low pitch examples two examples at each end of the spectrum.
Determine your roof s pitch.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
It is often compared to slope but is not exactly the same.
You can reroof a steep roof but you will need to take extra safety precautions.
Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.
So a roof with four inches of rise every 12 inches horizontally run would have a slope of 4 12 sometimes displayed as 4 12.
Step 1 safety.
The slope or pitch of the roof is determined by the vertical rise in inches for every horizontal twelve inch 12 length called the run.
The possibility of slipping and falling makes working on any roof dangerous but it s especially so if the roof rises more than 4 feet for every 12 feet of horizontal span.
If you happen to have an extremely steep roof you will have an even greater challenge.
Follow the simple steps belsow to reroof your own steep roof.
A roof with x rise 12 run slope means that for every 12 inches horizontally run it rises x inches.
Recommendations for application of asphalt shingles on steep slopes and mansard construction asphalt shingles on slopes greater than 21 12 defines the maximum slope for normal shingle application and suggests different installation methods for slopes beyond that maximum.
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For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.
The slope of the roof is known at the pitch.
Steep slope roofing the slope of a roof is often referred to as the pitch.