1 2 On 12 Roof Slope

Since this is a flat roof or nearly flat roof.

1 2 on 12 roof slope.

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. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

The most common slopes are. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

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. Asphalt shingles continue to be the most widely installed roof covering option in north america. Most roof s have a pitch in the 4 12 to 9 12 range. 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. A 4 12 slope is enough to accommodate water runoff but is not suitable for regions that are. 3 12 1 2 12 and 1 4 12. 0 pitch 1 00x the roof area.

Pitch of roof slope factor valley hip factor. For example if you measure 4 inches the pitch of your roof is 4 12. 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.

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Download the slope chart pdf. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.