1 2 On 12 Roof Slope

You can go by the measurements taken by walking the roof.

1 2 on 12 roof slope. Download the slope chart pdf. 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. 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.

Since this is a flat roof or nearly flat roof. The most common slopes are. Simply put it s a shallow roof. 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.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. 3 12 1 2 12 and 1 4 12. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

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. Asphalt shingles continue to be the most widely installed roof covering option in north america. A 4 12 slope is enough to accommodate water runoff but is not suitable for regions that are. Pitch of roof slope factor valley hip factor.

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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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. 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.

Roof pitch is a term describing how steep or flat your roof slope is. 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. 0 pitch 1 00x the roof area.