12 Roof Overhang

Each truss bears the truss plate institute tpi stamp for quality assurance.

12 roof overhang.

Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Most homes have an overhang however length varies greatly depending on the architectural style of the roof with slate roofs having longer overhangs typically. Truss capacity is. The roof overhang refers to how much the edge of the roof goes beyond the house siding.

Whereas the overhang on the gable end is a gable ladder. That said overhangs can extend as far as 2 without the need for external supports. Most roof s have a pitch in the 4 12 to 9 12 range. A typical metal roof overhang may be 2 to 4 inches or even less.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. Roof overhangs might look relatively routine but there is a lot of design thinking that goes into creating the optimal dimensions for each one. Measure your house at ground level then add in the roof s overhang for greater accuracy. Residential trusses save time and materials compared to conventional hand framing.

However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes. The overhang at the bottom of the slope is a simple overhang. Under the overhang is a structure known as the soffit. 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 siding underneath the overhang is known as the soffit. They are essential for framing and shading windows reducing splashback and getting rain to fall far enough away from the foundation. The length of the overhang depends primarily on the climate. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. The roof overhang occurs in a similar way to the pent roof in that the top chord of the roof truss projects past the wall plate by the desired amount. Overhangs are common in most house designs providing protection against both wind and rain.

Doing so keeps basements and crawlspaces dry and it also helps to. The lumber components are precision cut and assembled together with galvanized steel truss plates in a factory controlled environment.