Intersecting Roof Angles

This tutorial shows how to calculate roof rafter dimensions and angles for intersecting roof planes as in shed or dormer roof applications.

Intersecting roof angles.

A cross gable roof is a design that consists of two or more gable roof ridges that intersect at an angle most commonly perpendicular to one another. 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. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Roof pitch calculator results explained.

Angle the angle of a roof is the same as the roof s slope except instead of being. After a taking some. With this method. 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.

This type of roof is often seen in buildings with a more complex layout for example homes with an attached garage. Explore framing complexities that result when roofs of two different pitches intersect. We wanted to make the porch roof as steep as possible while keeping the peak of the roof below the wall to roof intersection at the top of the shed roof. The porch joined the house at right angles to a shed roof section.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Learn more about off angle roof framing. We designed the porch with wide overhangs for shade from the hot north carolina summer sun. The intersection of the rooflines forms inside corners.