1 2 Inch Slope Roof

Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch.

1 2 inch slope roof.

Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. Roof slopes are most commonly defined by the rise over run ratio. These roofs have a pitch less than 4 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. What exactly is roof slope. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. 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.

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 most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Low slope 2 in 12 to 4 in 12.

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. 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. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.

Simply put it s a shallow roof. Flat 0 in 12 to 2 in 12. 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.

If a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Most roof s have a pitch in the 4 12 to 9 12 range. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.

Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7. Drag sliders to animate the results and diagram. 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.