Normal Roof Overhang Length

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.

Normal roof overhang length.

The size of the roof overhang you choose depends largely on the style of your shed s roof. Measure your house at ground level then add in the roof s overhang for greater accuracy. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. The ideal spec for roof overhangs.

A typical metal roof overhang may be 2 to 4 inches or even less. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. The size of the roof overhang depends on the property. The length of the overhang depends primarily on the climate.

On very tall buildings there are hardly any benefits of roof overhangs as the surface areas of the walls are so high. With a flat shed roof the roof simply extends past the wall plate to provide an overhang. Roof pitches in. Overhangs are common in most house designs providing protection against both wind and rain.

Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. But roof overhangs are a great system to protect houses 3 stories and under. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. Home architects have a number of different options when they are looking to protect doors entryways and windows.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. The siding underneath the overhang is known as the soffit. The diagonal measures are actually relatively easy to get equal as it takes very little effort to shrink a long diagonal by several inches. Because this style of a shed has a flat roof it can facilitate a wider overhang which is ideal for storage.

The roof overhang length must be properly engineered to resist wind uplift.