1 In 4 Roof Slope

High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.

1 in 4 roof slope.

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. S grade 1 m 2 m 50 slope and roof pitch. 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. S grade 100 x 12 3.

This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. 0 pitch 1 00x the roof area. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Roof pitch is the slope created by the rafter. 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. 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. 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.

Most roof s have a pitch in the 4 12 to 9 12 range. 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. You can find the roof pitch in the form of x 12 like 4 12 or 9 12. Conventional roofs are the easiest to construct and you can walk on them safely.

Conventional from 4 12 1 in 3 to 9 12 3 in 4. 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. Roof pitch on the form x 12 can be expressed in grades as.

These roofs have a pitch less than 4 12. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. You can go by the measurements taken by walking the roof. 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. Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.