When outfitting your residential or commercial structure with roofing materials from everlast roofing inc it s important to know the incline or pitch of your roof.
Roofing pitch factor.
It is sometimes called the roof pitch multiplier.
Pitch is expressed as a ratio of the vertical rise to the horizontal span.
Roof pitch refers to the slope which the rafter creates.
Roof pitch factor calculator if you have already decided that you are going to have pitched roof on your house then you have made a nice decision.
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.
This numerical figure is significant as not everybody can understand the technical measurements.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
Let s say it is equal to 1 5 m.
Measure the rise of your roof.
Therefore your slope factor for a 6 12 pitch roof is 1 118.
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.
A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.
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.
Pitched roof provide you protection again heavy rains.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
There are lots of advantages that you can get by having pitched roof on your house as compare to flat roof.
The roof pitch conversion factor is a number that when multiplied by the area covered by the roof gives an estimate the total surface area of the sloped roof itself.
Pitch rise run 1 5 6 25.
For example if the pitch of the roof is 6 then it is written as 6 12.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
Factor charts you could calculate the slope factor for every single roof pitch but as a public service many roofing companies provide slope factor charts.
See the image below for more explanation on rise run and pitch.
Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.
In order to know what type of materials will work best for your project and the amount of materials required you ll need to find out the pitch of your roof.
Calculate the rafter length substituting these values into the following formula.
The whole table of roof pitch and slope gives a conversion factor so as to obtain a numerical figure of the slope.
Roof pitch and corresponding angles.
One medium to describe the roof pitch is in 12 runs.
