Gable Roof Overhang Framing Details

The construction of a roof overhang is one important way that homeowners can protect the exterior of their home and preserve its value.

Gable roof overhang framing details.

The picture above shows the plan view of a gable roof ladder trusses are made up using four noggins bridging at each corner to support a rafter outside the building. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. When designing a gable end eave without a return the dimensions to look at are the width of the trim set between 6 in. If you re a little unsure of your rough framing or roofing skills hire a carpenter to help with this phase of the roof dormer project.

The gable dormers we built are 6 ft. After the gable is framed lookouts extend from the first rafter inside the gable wall out over the plates to support the overhanging barge rafter. The rise or height of the roof at its peak is the altitude of the triangle. Place a piece of the plywood on the bottom corner of your roof making sure the edges are on a rafter beam.

Avoid gable ends that are over 8 in. The other common wind related failure at gable ends is uplift of the roof decking at the overhang. Put roof sheathing on top of your roof. The biggest problems with gable end overhang strength occur if your roof overhang is greater than about 12 inches.

Thick and the overhang from the side wall set between 12 in. Framing a dropped gable wall one of the keys to framing the rake with my system is building a dropped gable end wall the top of which is 3 1 2 inches below the tops of the rafters. And the line length measurement from the roof peak to the building wall is the hypotenuse. They can also include certain architectural features that make overhangs more than just functional parts of the home.

Use construction nails 6 in 15 cm apart to secure the plywood around the outer perimeter and along each support. Uplift of roof decking at the overhang. The run or half the building span is the base of the triangle. Framing a gable roof building a gable with barge end purlin struts and collar ties.

Of the many ways that gable end overhangs are built the two most common ways are the use of ladder details and outriggers ladder details are usually adequate if the overhang is less than about 8 inches although they are frequently used for longer overhangs. Each dormer adds about 30 sq. That rafter outside forms the overhang for the barge boards to fix to and so the soffit boards and ventilation are continuous all the way. This can be from two causes.

In designing the overhanging part of a. To 18 in depending on the style of the building. Use 1 2 in 1 3 cm plywood to cover the entire surface of your roof. Wide especially when the eave overhang is less than 12 in.