Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch.
Pitch asphalt roof.
California roofing laws cover everything from licensure of the roofing company to the types of shingles that must be used to the slope of the roof.
Pitched roofs are most often associated with asphalt shingles although standing seam roofs are becoming ever more popular on pitched roofs as well.
So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.
This roof is resistant to extreme weather conditions and can add great value to your home.
People choose this roof over other roofing options due to its easy installation and adaptability.
Asphalt shingle roofing is designed to shed water that is flowing downward over its surface with each shingle overlapping the one below.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
Make sure to get training on general roofing hazards and working at heights.
What is the minimum pitch slope of an asphalt shingle roof.
Coal tar pitch was a by product of processing coal to make coke which in turn was used in making carbon steel and electrodes for the aluminum industry.
Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
What is the minimum slope for an asphalt shingle roof.
Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Asphalt and pitch roofing involves the use of hot chemicals that add an additional layer of complexity and hazard to a roofing job.
Asphalt a by product of processing petroleum to make gasoline fuel oil and various hydrocarbon polymers was also popular.
Shingles can be fabricated from a wide range of materials such as asphalt least expensive to natural wood metal tiles and heavy slate most expensive.
The minimum requirement is 2 12.
Shingles of all types need to have a slope to function properly.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
The asphalt shingle roof is the widely used roof covering in north america.
For those who don t understand the roof pitch number here is a way to envision it.
For every 12 inches you travel on your ceiling the roof will rise 4 inches in height.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.
Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.
