12 Roof Overhang

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.

12 roof overhang.

A typical metal roof overhang may be 2 to 4 inches or even less. The roof overhang refers to how much the edge of the roof goes beyond the house siding. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. 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.

The lumber components are precision cut and assembled together with galvanized steel truss plates in a factory controlled environment. The siding underneath the overhang is known as the soffit. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. Doing so keeps basements and crawlspaces dry and it also helps to.

They are essential for framing and shading windows reducing splashback and getting rain to fall far enough away from the foundation. Roof overhangs might look relatively routine but there is a lot of design thinking that goes into creating the optimal dimensions for each one. Most homes have an overhang however length varies greatly depending on the architectural style of the roof with slate roofs having longer overhangs typically. The length of the overhang depends primarily on the climate.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. Each truss bears the truss plate institute tpi stamp for quality assurance. Residential trusses save time and materials compared to conventional hand framing. Trusses are professionally designed with state of the art computer programs.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Whereas the overhang on the gable end is a gable ladder. Under the overhang is a structure known as the soffit. The overhang at the bottom of the slope is a simple overhang.

Most roof s have a pitch in the 4 12 to 9 12 range. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. That said overhangs can extend as far as 2 without the need for external supports. Overhangs can vary from a few inches to a few feet depending on preference.

Overhangs are common in most house designs providing protection against both wind and rain. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes.