The first number represents the vertical rise in inches and the second refers to horizontal progression in inches.
Steepest roof 16 12.
2 12 4 12 conventional slope roof.
A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.
For every 12 horizontal feet the roof changes 8 feet in vertical height.
Outside of the u s a degree angle is typically used.
For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.
West coast roofer roofing and roof repair 3 572 624 views.
Thus pitch is typically greater in areas of high rain or snowfall.
The worst roofing job ever.
The a frame style roof shown just above located on highway 61 just south of hovland minnesota is built at a 75 angle and is considered a very steep roof.
9 12 20 12 steep slope.
Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.
This tops anything i have seen in 25 years of roofing duration.
The table below describes different roof slopes giving roor slope in rise run in inches and re expressing the same slopes as angle grade walk ability and roof type or class.
As an example 8 12 means that for every foot the rooftop rises 8 inches.
Most roof s have a pitch in the 4 12 to 9 12 range.
Roof slope is a very important aspect and it is considered the primary factor in roof design.
Steepest roof i ve ever done.
In the united states you typically see pitch described as 8 12 6 12 4 12 etc.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
The combination of two numbers are used to display or show the roof pitch.
Common roof pitches and equivalent grade degree and radian angles.
It isn t hard as long as you are careful take your time do it right and be safe.
It affects walkability as well as drainage and roofs in areas of high rain.
To start lets discuss how pitch is measured.
Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.
Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.
Roof pitch is a term describing how steep or flat your roof slope is.
The exact roof slope in degrees is given by the arctangent.