1 4 12 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.

1 4 12 roof slope.

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. They have a pitch ranging from 4 12 to 9 12. The triangle diagram will be re drawn to scale with all dimensions marked. Roof pitch is a term describing how steep or flat your roof slope is.

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. Pitch angle precision color. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.

This will give you the rise over run or pitch. Most roof s have a pitch in the 4 12 to 9 12 range. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or 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.

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. For example if you measure 4 inches the pitch of your roof is 4 12. Drag sliders to animate the results and diagram.

These roofs have a pitch less than 4 12. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Conventional roofs are the easiest to construct and you can walk on them safely. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. The combination of two numbers are used to display or show the roof pitch.