Flat Roof Soffit Overhang
Soffits are commonly constructed from fiber cement panels metal panels stucco vinyl panels or wood sheathing.
Flat roof soffit overhang. Soffited eaves and gable overhangs are susceptible to water damage caused by ice dams improper flashing torn shingles and faulty gutters. Closed eaves with flat soffit and raised heel. And once water has seeped in the rot spreads quickly because the wood stays soggy inside the dark dank space. The length of the overhang depends primarily on the climate.
Metal panels untreated wood panels and vinyl attic vents figure 1. The goal is to balance the amount of solar heat gain and amount of shading. This video will. While flat soffits work well in some situations in most they result in pork chop eave returns.
Damage is also caused by birds and squirrels nesting inside eaves. Soffits a soffit encloses the underside of sloped or flat roof overhangs. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. Proceed with extreme caution when using a flat soffit.
When you do use a flat soffit make sure to include a raised heel on the truss. Add up the total of all overhangs and divide the total by 100 to determine the number of squares. For instance i think that in heavy snow country large overhangs can lead to ice dams forming on the overhangs snow melting. See below i need to acknowledge there are some good reasons in some places to not have a large overhang.
In hot climates the general rule of thumb is to lengthen and extend the overhang. The siding underneath the overhang is known as the soffit. To determine the number of squares of soffit required measure the under eave areas and multiply the length by the width for each overhang. These guidelines are useful in the construction of any gable or any cantilevered or flat roof.
The exposed timber rafters and decking are susceptible to ignition and. Closed eaves with flat soffit and no raised heel. The default in eave design is a flat soffit.