Flat Roof Soffit Overhang

Metal panels untreated wood panels and vinyl attic vents figure 1.

Flat roof soffit overhang.

Overhangs are common in most house designs providing protection against both wind and rain. In hot climates the general rule of thumb is to lengthen and extend the overhang. To determine the number of squares of soffit required measure the under eave areas and multiply the length by the width for each overhang. See below i need to acknowledge there are some good reasons in some places to not have a large overhang.

This video will. Soffits a soffit encloses the underside of sloped or flat roof overhangs. Add up the total of all overhangs and divide the total by 100 to determine the number of squares. The goal is to balance the amount of solar heat gain and amount of shading.

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. And once water has seeped in the rot spreads quickly because the wood stays soggy inside the dark dank space. Soffits are commonly constructed from fiber cement panels metal panels stucco vinyl panels or wood sheathing. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction.

Closed eaves with flat soffit and no raised heel. Closed eaves with flat soffit and raised heel. The default in eave design is a flat soffit. When you do use a flat soffit make sure to include a raised heel on the truss.

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. Soffited eaves and gable overhangs are susceptible to water damage caused by ice dams improper flashing torn shingles and faulty gutters. The exposed timber rafters and decking are susceptible to ignition and. Damage is also caused by birds and squirrels nesting inside eaves.

Proceed with extreme caution when using a flat soffit. These guidelines are useful in the construction of any gable or any cantilevered or flat roof. The siding underneath the overhang is known as the soffit.