Flat Roof Soffit Overhang

The siding underneath the overhang is known as the soffit.

Flat roof soffit overhang.

While flat soffits work well in some situations in most they result in pork chop eave returns. The default in eave design is a flat soffit. The length of the overhang depends primarily on the climate. Overhangs are common in most house designs providing protection against both wind and rain.

These guidelines are useful in the construction of any gable or any cantilevered or flat roof. Even if most people don t register what it is that makes a home seem special using a sloped soffit is an easy way to make a home look old or built with more craftsmanship than typical new homes. Add up the total of all overhangs and divide the total by 100 to determine the number of squares. The exposed timber rafters and decking are susceptible to ignition and.

When you do use a flat soffit make sure to include a raised heel on the truss. For instance i think that in heavy snow country large overhangs can lead to ice dams forming on the overhangs snow melting. Metal panels untreated wood panels and vinyl attic vents figure 1. To determine the number of squares of soffit required measure the under eave areas and multiply the length by the width for each overhang.

Soffits a soffit encloses the underside of sloped or flat roof overhangs. This video will. And once water has seeped in the rot spreads quickly because the wood stays soggy inside the dark dank space. Most homes these days have boxed soffits but i find that a bit of creativity at the roof edge goes a long way toward style.

Soffits are commonly constructed from fiber cement panels metal panels stucco vinyl panels or wood sheathing. The goal is to balance the amount of solar heat gain and amount of shading. Soffited eaves and gable overhangs are susceptible to water damage caused by ice dams improper flashing torn shingles and faulty gutters. In hot climates the general rule of thumb is to lengthen and extend the overhang.

Closed eaves with flat soffit and no raised heel. Damage is also caused by birds and squirrels nesting inside eaves. See below i need to acknowledge there are some good reasons in some places to not have a large overhang.