Flat Roof Overhang Framing Details

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Flat roof overhang framing details.

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. Flat roof framing is relatively straightforward. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. 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.

This is a detail to avoid at all costs. With a flat shed roof the roof simply extends past the wall plate to provide an overhang. For gabled roofs the roof rafters extending beyond. And the line length measurement from the roof peak to the building wall is the hypotenuse.

There is no reason to use a pork chop eave. Depending on the span many different materials can frame a flat roof. The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. 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.

If you must use a flat soffit stop the flat portion of the soffit at the wall to align with the corner board. Of course you don t need to live in a modern house to deal with a flat roof. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. To determine exactly what the rafter tail will look like i always make a full size drawing on a scrap of plywood of all the eaves elements including framing and finish materials see illustration above.

The run or half the building span is the base of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The rise or height of the roof at its peak is the altitude of the triangle. If you are not able to use an angled soffit use one of the two flat soffit details illustrated below.

The construction of a roof overhang is one important way that homeowners can protect the exterior of their home and preserve its value. They can also include certain architectural features that make overhangs more than just functional parts of the home. In designing the overhanging part of a.