1 In 4 Roof Slope

Roof pitch is the slope created by the rafter.

1 in 4 roof slope.

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. S grade 100 x 12 3. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. Roof pitch on the form x 12 can be expressed in grades as.

This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. These roofs have a pitch less than 4 12. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. Slope conversion tables 1 4 1 2 3 4 1 1 1 4 1 1 2 1 3 4 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 2 25 3 4 5 6 7 8 9 10.

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. Conventional roofs are the easiest to construct and you can walk on them safely. 0 pitch 1 00x the roof area. 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.

Since this is a flat roof or nearly flat 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. High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. Low slope roofing which requires special materials and techniques to avoid leaks and ranges from 1 12 2 12 to 4 12 1 in 3.

They have a pitch ranging from 4 12 to 9 12. You can go by the measurements taken by walking the roof. If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. S grade 1 m 2 m 50 slope and roof pitch.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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. You can also calculate roof pitch even without using a roof slope calculator. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

The basic ranges of pitch are not uniformly defined but range from flat which are not perfectly flat but sloped to drain water up to 1 2 12 to 2 12 1 in 24 to 1 in 6. Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. Most roof s have a pitch in the 4 12 to 9 12 range.