Residential Flat Roof Specs

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot.

Residential flat roof specs. All shingles shall be installed by galv. Flat roofs that are truly horizontal can have a ballast or attached system put in place to create a pitch of at least 10 degrees. However over the last few decades new and advanced materials have been developed. Advantages of a flat low slope roof system.

Some degree of tilt 3 to 4 degrees is best able to help keep solar panels clean when it rains. Most flat roofs are typically not as long lasting or durable as sloped ones because the latter shed snow and rain a lot quicker. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. We love the flexibility of a flat roof for certain design limitations but they have a bit of reputation for leaks and repairs.

Most often used in commercial and industrial applications this flat roof system contains layers of waterproof membrane such as a treated fiberglass basemat tar and gravel to seal the flat roof surface. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. The vast majority of flat roofs use a type of rolled roofing. Rubber epdm tpo or bitumen.

Or stapled with crown width length per manuf. Technology has improved to install non penetrating ballast systems to prevent leakage. 4 per shingle minimum 6 per shingle in high wind areas and the coast line. Photo by russell kaye.

Furnish and install new aluminum coil stock to cover all fascia and roof trim. Pros and cons for flat roof materials all three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. Verify color with owner.

The most important thing to know about a flat roof says tom is that it s not flat to prevent water from pooling and eventually invading the home flat roofs are always built on a slight incline at least 1 8 inch per foot. A classic flat roof is either almost completely level or has a very slight pitch of 3 in 12 inches or less. Used as an architectural device for residential homes flat roofs are more commonly seen in large industrial manufacturing or commercial buildings. Roofing nails long note.