1 4 12 Roof Slope

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope.

1 4 12 roof slope.

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. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. This will give you the rise over run or pitch. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 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. Conventional roofs are the easiest to construct and you can walk on them safely. 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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Pitch angle precision color.

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. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. Most roof s have a pitch in the 4 12 to 9 12 range. For example if you measure 4 inches the pitch of your roof is 4 12.

Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. These roofs have a pitch less than 4 12. The combination of two numbers are used to display or show the roof pitch. Drag sliders to animate the results and diagram.

The triangle diagram will be re drawn to scale with all dimensions marked. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. They have a pitch ranging from 4 12 to 9 12. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Roof pitch is a term describing how steep or flat your roof slope is.