Comparison of Flat Roof to Other Types of Roofing

Flat roofs are one of the modern roof models but to prevent water infiltration, flat roof do require a good maintenece..

With a variety of choices with roof models, flat roofs have not been left out of other popular types of roofs like tile, copper or slate roofs. They are just as important and require even more attention. In order to avoid throwing away money on short-term repairs, you should know exactly how flat roof systems are designed, the various types of flat roofs that are available, and the importance of routine inspection and maintenance.

Flat roofing systems have different types, and they are commonly classified into four types. These include (listed in order of increasing cost and durability): roll asphalt, single-ply membrane, multiple-ply or built-up, and flat-seamed metal.

Asphalt roll roofing has been widely used since 1800s. It is composed of a fiberglass base felts or a single layer of asphalt-saturated organic that are over the roof felt. It is generally covered with granular mineral surface. The seams are typically covered over with a roofing compound. It can last about 10 years.

One of the lates roofing material is the single-ply membrane. It noramlly replace multiple-ply roofs. Though your roofing contractor can usually give a ten to 12 years of warranty, a correct installaion and maintenance is crucial for this type of roofing.

Multiple-ply or built-up roofing, also known as BUR, is made of overlapping rolls of saturated or coated felts or mats that are interspersed with layers of bitumen and surfaced with a granular roofing sheet, ballast, or tile pavers that are used to protect the underlying materials from the weather. This type of roofing usually lasts for about ten to thirty years but it would still depend on the quality of the materials that were used.

The last type is the flat-seamed roofing which has been existing since the early 1900s. Made from small pieces of sheet metal soldered flush at the joints, it can last many decades depending on the quality of the material, maintenance, and exposure to the elements.