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.
Roofing pitch factore.
Roof pitch refers to the slope which the rafter creates.
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.
One medium to describe the roof pitch is in 12 runs.
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.
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.
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.
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.
There are lots of advantages that you can get by having pitched roof on your house as compare to flat roof.
This numerical figure is significant as not everybody can understand the technical measurements.
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.
Charts list the slope factor for various pitches usually from 1 12 to 12 12.
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.
Pitched roof provide you protection again heavy rains.
It is sometimes called the roof pitch multiplier.
For example if you measure 4 inches the pitch of your roof is 4 12.
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.
How roof pitch determines suitable roofing systems.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
For instance the ever last roofing company distributes a chart to the general public.
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.
For example if the pitch of the roof is 6 then it is written as 6 12.
