4 12 Pitch Single Ply Roofing

For every 12 horizontal feet the roof changes 8 feet in vertical height.

4 12 pitch single ply roofing.

This system is suitable for roofs with a slope between 1 12 8 and 4 12 33. Warranty the resisto single ply roofing system is guaranteed for 15 years against any manufacturing defect that may cause leaks. Ideally you will have safe access to your roof from inside the building. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.

Measuring a roof pitch. Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches. Outside of the u s a degree angle is typically used. 4 12 roof pitch equivalents roof rises 4 in a length of 12.

For ballasted single ply roofing systems approved august 5 2013 page 2 1 0 introduction this standard provides a method of designing wind uplift resistance of ballasted single ply roofing systems. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. The gentle slope of a 4 12 pitch roof falls.

A 4 12 roof pitch indicates the roof rises 4 inches in height for every 12 inches as measured horizontally from the edge of the roof to the centerline. If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. 4 12 roof pitch to angle 18 43 degrees equivalents. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater.

It is often compared to slope but is not exactly the same. Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater.

It is intended as a design and installation reference for those individuals who design specify and install ballasted single ply roofing systems. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

Also referred to as 4 12 roof slope 4 on 12 4 to 12 and 4 12 roof angle. Liquid applied roofing requires a minimum roof pitch of 1 4 12 or greater. Sprayed polyurethane foam roofing requires a minimum roof pitch of 1 4 12 or greater.