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.
Roof pitch factors.
Especially for homes in the south a low pitch roof.
The leftover part is very simple as it simply involves mathematics.
This will give you the rise over run or pitch.
If you have already decided that you are going to have pitched roof on your house then you have made a nice decision.
There are lots of advantages that you can get by having pitched roof on your house as compare to flat roof.
Roof pitch factor the roof pitch is a measure of roof steepness.
Roof pitch factor calculator.
So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally.
Multiply the result by the factor and this is the length of the roof from base to ridge.
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.
Low pitch roofs are safer and easier to access when maintenance.
The pitch is defined as the slope of the roof and is commonly represented as the ratio of the rise over the run in the form x 12.
For example if you measure 4 inches the pitch of your roof is 4 12.
Dividing the house width by two equals 14 feet.
The lower pitch of the roof means greater walkability.
From the roof pitch factor table note down the roof pitch conversion factor corresponding to the roof pitch calculated.
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.
If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe.
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.
Since a low pitch roof doesn t require as many shingles more often than not a low pitch roof will end up being more.
In our example the roof pitch was calculated as 9 12 which has a factor of 1 25 in the table.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
Roof pitch and corresponding angles.
Pitched roof provide you protection again heavy rains.
