1 2 On 12 Roof Slope

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1 2 on 12 roof slope.

Roof pitch is a term describing how steep or flat your roof slope is. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The most common slopes are. Download the slope chart pdf.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. For example if you measure 4 inches the pitch of your roof is 4 12. This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.

Pitch of roof slope factor valley hip factor. Asphalt shingles continue to be the most widely installed roof covering option in north america. The combination of two numbers are used to display or show the roof pitch. Once you ve figured out the pitch of your roof you can consult the following chart to discover the slope factor and hip valley factor.

Most roof s have a pitch in the 4 12 to 9 12 range. Simply put it s a shallow roof. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

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. 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. Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. You can go by the measurements taken by walking the roof.

0 pitch 1 00x the roof area. 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. 3 12 1 2 12 and 1 4 12. Since this is a flat roof or nearly flat roof.