1 2 On 12 Roof Slope

3 12 1 2 12 and 1 4 12.

1 2 on 12 roof slope.

For example if you measure 4 inches the pitch of your roof is 4 12. 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. 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. 0 pitch 1 00x the roof area.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Pitch of roof slope factor valley hip factor.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Roof pitch is a term describing how steep or flat your roof slope is. 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.

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. 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. Simply put it s a shallow roof. Asphalt shingles continue to be the most widely installed roof covering option in north america.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Since this is a flat roof or nearly flat roof. 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.

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. 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 most common slopes are. A 4 12 slope is enough to accommodate water runoff but is not suitable for regions that are.