Roof Slope Factor Chart

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.

Roof slope factor chart.

The pitch of a roof is determined by 2 numbers. Multiply this amount by the slope factor 960 1 1180 1073 28. Download the slope chart pdf. Finding the slope and hip and valley factor.

Roof pitch is a term used in the roofing industry to describe the angle slope of a roofing structure. The area of a hip roof equals the area of a gable roof with the same dimensions. The combination of two numbers are used to display or show the roof pitch. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Multiply the roof length by the gable wall length 40 24 960. Most commonly a roof pitch will be from 0 flat to 12 45. The area of this roof 1073 3 sq. Roof pitch is a term describing how steep or flat your roof slope is.

This will give you the rise over run or pitch. Roof pitch angle and slope factor charts. For example if you measure 4 inches the pitch of your roof is 4 12. 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 rise and the length. 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. Valley hip factor.