Roofing Framing Details

Nearly all roofs are framed using one of two methods.

Roofing framing details.

Standard stick framing or the newer truss framing. Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house. The rafters carry the applied loads to the exterior walls. Roof framing can be simple or complex depending on the roof.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Stick truss roof framing. The function of each component is. The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging.

Needed to tie the roof together where the rafters are framed at an angle to each other. The run or half the building span is the base of the triangle. Refer to the details. Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to al low flashing laps to face away from wind driven rain.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. The rise or height of the roof at its peak is the altitude of the triangle. The original roof was built using purlins beams extending between gable ends.

In a rafter roof all of these components are required to provide a stable roof. Rafters act more like the top chord of a roof truss than as a roof joist.