1 2 Roof Pitch

A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

1 2 roof pitch.

1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42. Commonly used roof pitches were given names such as greek. Since this is a flat roof or nearly flat roof. 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.

Roof pitch defined and explained. The maths behind this number is that it is the square root of rise run 2 1. Roof pitch is a term describing how steep or flat your roof slope is. Historically roof pitch was designated in two other ways.

For example given a roof with a rise of 4 feet and a span of 24 feet the pitch is 1 to 6 pitch which can be expressed as the fraction of 1 6. The pitch can be expressed numerically as a fraction. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. You can go by the measurements taken by walking the roof.

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 table below shows common roof pitches and the equivalent grade degrees and radians for each. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 0 pitch 1 00x the roof area.

If a roof rises 2 in a length of 12 this is 2 12 roof pitch. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Roof pitch designations are comprised of two numbers indicating a ratio. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

The combination of two numbers are used to display or show the roof pitch. A ratio of the ridge height to the width of the building span and as a ratio of the rafter length to the width of the building. 2 12 roof pitch angle 9 46 degrees. The pitch fraction represents a certain amount of vertical rise over the entire span.

A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Most roof s have a pitch in the 4 12 to 9 12 range.