Ridge Runs Into A Higher Roof

To scribe the angle we placed a length of stock on top of the rafter peaks and leveled it across using a scrap block to trace the angle.

Ridge runs into a higher roof.

The ridge board must be set as perfectly as possible so take your time and use careful measurements. Take the run of the main roof 9 feet and using your square and the pitch of the hip in relationship to the main roof 8 inches and 15 5 8 inches step off this distance in the conventional manner. The culture of fastening through the ridge crest or through the valley of the metal roof profile seems to vary in the continental u s. The initial cost of roof ridge vents is usually higher.

Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the dropped structural ridge to the apex of the sleepers. Rob haddock a metal roof consultant and director of the metal roof advisory group responds. In ridge beam roof construction the connection of the rafters to the ridge must handle the entire gravity load on the rafters. Getting a little more technical the national roofing contractors association defines the ridge as the highest point on a roof represented by a horizontal line where two roof areas intersect running the length of the area.

In most cases that connection is achieved with manufactured load rated hardware. However the irc does allow a prescriptive wood to wood connection of the rafters to the ridge for slopes of 3 12 and greater. Rafters are nailed to the ridge board and run down to overhang the exterior wall. Roof ridge vents provide a costly system of ventilation that may not be suitable for the checkbooks of some homeowners.

Determining the height of the ridge board sets the stage for cutting the angles on the rafters and setting them at them correct height for the pitch of the roof. In simple language the ridge of a roof is the peak where two opposing roof planes meet. A 1 in 12 roof pitch roof rises 1 inch for every 12 inches of run. The ridge board runs the length of the building and provides support for the tops of the rafters helping the whole roof structure work together as a system.

This option might be the updated system which most newer homes use but if you have an older home then you might need the soffit vents too. From one place to the next from one contractor to the next and even from one manufacturer to the next.