How Many Roof Pitches Are There

The pitch of a roof is its vertical rise over its horizontal span.

How many roof pitches are there.

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. The combination of two numbers are used to display or show the roof pitch. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Use our roof pitch calculator to find the pitch of your roof.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. This roof shingle calculator requires four basic inputs.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. Roof length measured in feet roof width measured in feet roof pitch. 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. The most commonly used roof pitches fall in a range between 4 12 and 9 12.

Contemporary houses often have flat roofs which shouldn. The roofing materials most often used for these pitches include asphalt composite shingles. Roof pitch area multipliers. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. 4 12 to 20 12 pitches. The pitch of the roof is the rise over a 12 inch run.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. What is the standard pitch for a roof. There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. 100 1 054 105 4ft 2. However most often a ratio of pitch also fraction is slang used for the more useful slope of rise over run of just one side half the span of a dual pitched roof. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.

There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12. With that as background you are now ready to estimate how many shingles you will purchase for your roof project.