Roof Slope Factor Chart

This will give you the rise over run or pitch.

Roof slope factor chart.

Roof pitch is a term used in the roofing industry to describe the angle slope of a roofing structure. Once you ve figured out the pitch of your roof you can consult the following chart to discover the slope factor and hip valley factor. For example if you measure 4 inches the pitch of your roof is 4 12. Multiply the roof length by the gable wall length 40 24 960.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. 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. Roof pitch angle and slope factor chart for tile shingle slate and metal roofing. The rise and the length.

Valley hip factor. The combination of two numbers are used to display or show the roof pitch. Download the slope chart pdf. Roof pitch angle and slope factor charts.

The pitch of a roof is determined by 2 numbers. 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. The area of this roof 1073 3 sq. 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.

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. Finding the slope and hip and valley factor. The area of a hip roof equals the area of a gable roof with the same dimensions.