Hip Roof Pitch Angles

The hip roof is the most commonly used roof style in north america after the gabled roof.

Hip roof pitch angles. With the saw bevel angle set to 45 cutting hips and creepers at the plumb cut angle will produce correct side angles. In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Using these angle definitions i will derive formulas for the sheathing θ s and hip pitch angle θ h given the common pitch angle which i call the roof pitch θ r and plan angle θ p. Hip roof framing hip to common to ridge join diagram.

One expression of a hip roof pitch based on this formula would be 4 12 meaning a 4 inch vertical rise for every 12 horizontal inches. To derive formulas for the critical angles we need to define some terms which i do in figure 2. If using a circular saw or compound miter saw set saw bevel angle to 45 to obtain creeper and hip side angles. A hip roof or a hipped roof is a style of roofing that slopes downwards from all sides to the walls and hence has no vertical sides.

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. After that you will have to try and find a good hip roof pitch calculator to make sure you can get the last of the calculations. This style of roofing became popular in the united states during the 18 th century in the early georgian period. The angle at which the roof plane rises will account for a consistent height in inches above the 12 inch horizontal line and is described as the nominator of the pitch calculation ratio.

There are lots of things to think about and consider when taking on a hip roof style so having a reliable all in one hip roof calculator is going to be very useful for this job. 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. On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections.

Hip roof framing rafter cut angle template diagram. While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof. See saw miter and blade angle settings.