For those who don t understand the roof pitch number here is a way to envision it.
Pitch asphalt roof.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.
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.
Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.
The asphalt shingle roof is the widely used roof covering in north america.
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 codes establish a list of rules that all builders and contractors must adhere to in order to ensure safe building practices within the state.
So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.
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.
The minimum requirement is 2 12.
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.
Asphalt and pitch roofing involves the use of hot chemicals that add an additional layer of complexity and hazard to a roofing job.
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.
Make sure to get training on general roofing hazards and working at heights.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch.
People choose this roof over other roofing options due to its easy installation and adaptability.
What is the minimum pitch slope of an asphalt shingle roof.
Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.
Shingles of all types need to have a slope to function properly.
This roof is resistant to extreme weather conditions and can add great value to your home.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
Asphalt a by product of processing petroleum to make gasoline fuel oil and various hydrocarbon polymers was also popular.
For every 12 inches you travel on your ceiling the roof will rise 4 inches in height.
Metal roof shingles require a minimum roof pitch of 3 12 or greater.
Roofing systems originally consisted of alternate layers of hot bitumen and reinforcement.
Asphalt shingle roofing is designed to shed water that is flowing downward over its surface with each shingle overlapping the one below.
