Roof Slope Factor Chart

Roof pitch angle and slope factor charts.

Roof slope factor chart.

Roof pitch is a term used in the roofing industry to describe the angle slope of a roofing structure. 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. 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. The pitch of a roof is determined by 2 numbers.

Finding the slope and hip and valley factor. Roof pitch is a term describing how steep or flat your roof slope is. The combination of two numbers are used to display or show the roof pitch. Roof pitch angle and slope factor chart for tile shingle slate and metal roofing.

The area of a hip roof equals the area of a gable roof with the same dimensions. Download the slope chart pdf. Valley hip factor. Most commonly a roof pitch will be from 0 flat to 12 45.

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 example if you measure 4 inches the pitch of your roof is 4 12. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. 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.

The area of this roof 1073 3 sq. The rise and the length. Multiply the roof length by the gable wall length 40 24 960.