Residential Flat Roof Specs

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.

Residential flat roof specs.

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. Advantages of a flat low slope roof system. Rubber epdm tpo or bitumen. 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.

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. 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. Technology has improved to install non penetrating ballast systems to prevent leakage. However over the last few decades new and advanced materials have been developed.

Most flat roofs are typically not as long lasting or durable as sloped ones because the latter shed snow and rain a lot quicker. The vast majority of flat roofs use a type of rolled roofing. Verify color with owner. 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.

We love the flexibility of a flat roof for certain design limitations but they have a bit of reputation for leaks and repairs. Used as an architectural device for residential homes flat roofs are more commonly seen in large industrial manufacturing or commercial buildings. These are all relatively inexpensive materials and easy to install but most of them have a limited lifespan of 10 to 15 years. Furnish and install new aluminum coil stock to cover all fascia and roof trim.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. This flat roof system is still used in some residential applications because of its affordability and fire resistance. Or stapled with crown width length per manuf. 4 per shingle minimum 6 per shingle in high wind areas and the coast line.

Some degree of tilt 3 to 4 degrees is best able to help keep solar panels clean when it rains. Never 100 percent flat these roofs have a slope of less than 10 degrees. All shingles shall be installed by galv. Just enough slope to drain water but also flat enough to be a problem if not constructed properly.