1 In 4 Roof Slope

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

1 in 4 roof slope.

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. Roof pitch is the slope created by the rafter. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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. 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. 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 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. S grade 100 x 12 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.

They have a pitch ranging from 4 12 to 9 12. 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. 0 pitch 1 00x the roof area. 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.

You can find the roof pitch in the form of x 12 like 4 12 or 9 12. You can also calculate roof pitch even without using a roof slope calculator. Conventional from 4 12 1 in 3 to 9 12 3 in 4. Roof pitch on the form x 12 can be expressed in grades as.

These roofs have a pitch less than 4 12. High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. Since this is a flat roof or nearly flat roof.

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. Most roof s have a pitch in the 4 12 to 9 12 range. 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.