Roof pitch refers to the slope which the rafter creates.
Roofing pitch factore.
The roof pitch would be described as a 6 12 pitch.
That is to say the roof pitch expressed as a ratio tells you how many inches the roof rises for every 12 inches of depth.
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.
One medium to describe the roof pitch is in 12 runs.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
Pitched roof provide you protection again heavy rains.
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.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
For example if the pitch of the roof is 6 then it is written as 6 12.
So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.
This will give you the rise over run or pitch.
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.
It is sometimes called the roof pitch multiplier.
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.
How roof pitch determines suitable roofing systems.
The whole table of roof pitch and slope gives a conversion factor so as to obtain a numerical figure of the slope.
For example if you measure 4 inches the pitch of your roof is 4 12.
Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off.
This numerical figure is significant as not everybody can understand the technical measurements.
Roof pitch and corresponding angles.
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.
For instance the ever last roofing company distributes a chart to the general public.
Charts list the slope factor for various pitches usually from 1 12 to 12 12.
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.
