1 2 Inch Slope Roof

Flat 0 in 12 to 2 in 12.

1 2 inch slope roof.

The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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.

Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. Drag sliders to animate the results and diagram. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. 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.

Most roof s have a pitch in the 4 12 to 9 12 range. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Simply put it s a shallow roof. Low slope 2 in 12 to 4 in 12.

Flat roofs are not perfectly flat in reality they need a small slope for water runoff. 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. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. We can divide roofs into the following categories.

Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7. 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 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Roof slopes slope rise run in inches conventional slope 4 in 12 and up.

These roofs have a pitch less than 4 12. What exactly is roof slope. The triangle diagram will be re drawn to scale with all dimensions marked. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. For example a pitch 1 12 means that per every twelve yards of building length the rise will be equal to one yard.