Roof Pitch Conversion Factor

Then you ll be able to measure slope from an unfinished attic space under the roof.

Roof pitch conversion factor.

Usually they come in the form of a roof pitch diagram chart but other times it will be presented to you in a conversion format. The combination of two numbers are used to display or show the roof pitch. The headache of using pythagoras and trigonometry can be spared by making use of these charts. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.

Roof pitch is used to describe the slope or angle of the roof. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

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. 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. The roof slope factor chart also consists of conversion factors to determine the slope of the 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.