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