Flat Roof Overhang Framing Details

Typical design and construction eaves.

Flat roof overhang framing details.

Flat soffit stopping at end wall. The size of the roof overhang you choose depends largely on the style of your shed s roof. This is a detail to avoid at all costs. Depending on the span many different materials can frame a flat roof.

Overhangs are extensions of the roof beyond the exterior wall i e the. But are they really necessary. The construction of a roof overhang is one important way that homeowners can protect the exterior of their home and preserve its value. For gabled roofs the roof rafters extending beyond.

With composite siding such as boral s truexterior siding over a ventilated rain screen and with properly executed flashing at the windows and doors the walls on the fhb house will be able to handle rain just fine. 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. With a flat shed roof the roof simply extends past the wall plate to provide an overhang. Contemporary designers frequently aim to produce the same clear and simplified forms that appeared at the beginning of the 20th century but are now free to use a wide range of new materials and construction techniques that reflect present day technology.

An eave typically has a metal edge flashing and gutter that are attached to a wood fascia trim board. 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. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. Eaves are located at the down slope edge of a sloped roof and serve as the transition between the roof and fascia wall.

Roof overhangs at the eaves and rakes protect the walls below from rain and sun. The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. If you must use a flat soffit stop the flat portion of the soffit at the wall to align with the corner board. They can also include certain architectural features that make overhangs more than just functional parts of the home.

Flat roof framing is relatively straightforward. In designing the overhanging part of a. If you are not able to use an angled soffit use one of the two flat soffit details illustrated below. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture.