Standard Length Of A Roof Overhang

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Standard length of a roof overhang.

Overhangs are common in most house designs providing protection against both wind and rain. Under the overhang is a structure known as the soffit. The roof overhang length must be properly engineered to resist wind uplift. The size of the roof overhang you choose depends largely on the style of your shed s roof.

For example 4 12. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. Again this length can be adjusted to fit the need of the truss. This is particularly true in geographical regions where high winds are a common issue.

By precutting all of the roof purlins to length and making any necessary adjustments in the last bay of the roof it should be possible to easily be within 1 16 th inch plus or minus. If the overhang extends beyond 24 inches say to 30 inches then a 2 6 top chord for the tail section will be required to handle the additional overhang. Because this style of a shed has a flat roof it can facilitate a wider overhang which is ideal for storage. A typical metal roof overhang may be 2 to 4 inches or even less.

The length of the overhang depends primarily on the climate. At the rakes however with a nod to yankee frugality and clean modern lines we kept the roof trim as close to flush as practical while still allowing for a rain screen channel. Make the main roof wide enough to protect all windows and doors. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.

The siding underneath the overhang is known as the soffit. The vertical rise of the top chord per 12 horizontal inches is the roof pitch or slope. With a flat shed roof the roof simply extends past the wall plate to provide an overhang. If the home only has one level the standard roof design strategy is clear.

The diagonal measures are actually relatively easy to get equal as it takes very little effort to shrink a long diagonal by several inches. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.