20 12 Pitch Roof

The steep roof of the tropical papua new guinea longhouse for example sweeps.

20 12 pitch roof.

This tops anything i have seen in 25 years of roofing duration. Steepest roof i ve ever done. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The exact roof slope in degrees is given by the arctangent.

The worst roofing job ever. Low slope roofs are from 0 to 3 12 in pitch. 800 multiplied by 1 16. If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.

The value arrived at 928 reflects the square feet of the roof. Thus pitch is typically greater in areas of high rain or snowfall. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Notes to the table above.

4 12 to 20 12 pitches. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Multiply step 1 and step 2 i e. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.

A great many residential roofs fall into this category. West coast roofer roofing and roof repair 3 572 624 views. I m starting on a job with a roof that starts as a 5 12 and slopes up to a 20 12 about 24 of it is 5 26 is 14 and 50 of the roof is at 20. November 19 2014 10 42pm 1.

Multiply 20 and 40 which equals 800. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The roofing materials most often used for these pitches include asphalt composite shingles.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Traditional 3 tab shingles made with asphalt composite are the most popular type of shingle and are the most flexible in terms of adapting to many roof pitches. Find the value of 7 12 from the roof slope multiplier table which is 1 16.