There are lots of advantages that you can get by having pitched roof on your house as compare to flat roof.
Roofing pitch factore.
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.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
Charts list the slope factor for various pitches usually from 1 12 to 12 12.
One medium to describe the roof pitch is in 12 runs.
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.
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.
For example if you measure 4 inches the pitch of your roof is 4 12.
For example if the pitch of the roof is 6 then it is written as 6 12.
The whole table of roof pitch and slope gives a conversion factor so as to obtain a numerical figure of the slope.
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.
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.
For instance the ever last roofing company distributes a chart to the general public.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
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.
Roof pitch refers to the slope which the rafter creates.
So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.
Roof pitch and corresponding angles.
It is sometimes called the roof pitch multiplier.
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.
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.
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 will give you the rise over run or pitch.
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.
