Flat Roof Overhang Framing Details

This is a detail to avoid at all costs.

Flat roof overhang framing details.

For gabled roofs the roof rafters extending beyond. They can also include certain architectural features that make overhangs more than just functional parts of the home. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. And the line length measurement from the roof peak to the building wall is the hypotenuse.

Because this style of a shed has a flat roof it can facilitate a wider overhang which is ideal for storage. The rise or height of the roof at its peak is the altitude of the triangle. The size of the roof overhang you choose depends largely on the style of your shed s roof. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. Of course you don t need to live in a modern house to deal with a flat roof. If you must use a flat soffit stop the flat portion of the soffit at the wall to align with the corner board. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c.

Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. Depending on the span many different materials can frame a flat roof. Flat roof framing is relatively straightforward. 2x framing wood joists timber framing laminated beams steel concrete or sips.

There is no reason to use a pork chop eave. If you are not able to use an angled soffit use one of the two flat soffit details illustrated below. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. With a flat shed roof the roof simply extends past the wall plate to provide an overhang.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. In designing the overhanging part of a. The run or half the building span is the base of the triangle.