1 2 Inch Slope Roof

If a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss.

1 2 inch slope roof.

Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7. Roof slopes slope rise run in inches conventional slope 4 in 12 and up. Flat roofs are not perfectly flat in reality they need a small slope for water runoff. What exactly is roof slope.

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. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

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. Simply put it s a shallow roof. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Roof slopes are most commonly defined by the rise over run ratio.

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. We can divide roofs into the following categories. 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 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 triangle diagram will be re drawn to scale with all dimensions marked. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Low slope 2 in 12 to 4 in 12.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Drag sliders to animate the results and diagram. Most roof s have a pitch in the 4 12 to 9 12 range. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

These roofs have a pitch less than 4 12. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Flat 0 in 12 to 2 in 12.