The roof pitch is described as rise in run which is 12 units.
Pitch factor for roof.
A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.
This numerical figure is significant as not everybody can understand the technical measurements.
You can use this roof slope calculator.
Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.
They have a pitch ranging from 4 12 to 9 12.
Here let s assume the pitch is 6 12.
One medium to describe the roof pitch is in 12 runs.
For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.
On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.
For this example suppose the roof is 20 ft wide measured from the roof.
You can also calculate roof pitch even without using a roof slope calculator.
Step by step example using the roof pitch factor table measure the dimensions covered by the roof.
Conventional roofs are the easiest to construct and you can walk on them safely.
Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.
You just need to go to any of those websites and there insert the required information and they will tell you your roof pitch factor.
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.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
Another option that is available for you in finding the pitch factor for your roof is to find roof pitch factor calculator online.
Roof pitch and corresponding angles.
This will give you the rise over run or pitch.
The whole table of roof pitch and slope gives a conversion factor so as to obtain a numerical figure of the slope.
There are many websites which are offering this facility.
Look up the multiplier in.
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 measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
For example if you measure 4 inches the pitch of your roof is 4 12.
