4 12 Roof Slope Calculator

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

4 12 roof slope calculator. 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. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. The roof pitch or roof slope will affect the interior volume of a building the drainage the style and the covering material of roof. The roof pitch factor is also used to calculate the length of common rafters.

Rise run rise run slope. Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. To find the total length of a common rafter consider the run to be the horizontal distance covered by the whole rafter from the end of the rafter tail the part of the rafter which extends past the outside of the wall to the near side of the ridge board.

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. 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. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. It is often compared to slope but is not exactly the same.

Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof. To do this simply convert the rise and run as a fraction to a decimal form eg. A roof pitch of 4 in 12 4 12 has a rise of 4 and a run of 12. A 4 in 12 pitch becomes 4 12 then divide.

Includes result for hip valley factor slope factor and the roof slope in degrees. For a pitch expressed in inches per foot convert to a fraction first eg. For instance a 7 12 roof pitch means that the roof. For example if you measure 4 inches the pitch of your roof is 4 12.