![]() ![]() Sometimes referred to as mod bit, modified bitumen systems are made of tar (or asphalt) and fiberglass. The single-ply roofing material is often used for sheds. Metal roofs can be made of aluminum, copper, steel, or zinc.Ĭost: $3-$20 per square foot (including labor) Modified Bitumen Systems (MBS) Photo Credit: Industrial Photograph / Canva Pro / Licenseĭeveloped during the 1960s, modified bitumen roofs are one of the most popular flat roof types. Flat metal roofs consist of long metal sheets held down by fasteners or screws. Not every metal roof is flat, but some metal roofs are flat roofs. Leaks or other problems are different to detect and locateĬost: $15-$50 per square foot (including labor) Metal Roofs Photo Credit: Prime Stock / Canva Pro / License.Green roofs can be extensive, intensive, or semi-intensive, depending on how many plants - and how many big plants - you want for your green roof and what the structure can hold. They create a rooftop garden, perfect for plant-loving homeowners. GRP panel roofs don’t do well with foot traffic, so limit walking on this type of roof as much as possible.Ĭost: $4-$7 per square foot (including labor) Green Roofs Photo Credit: Arlington County / Flickr / CC BY-SA 2.0Īppropriately known as living roofs or rooftop gardens, green roofs originated in Germany in the 1960s and consist of vegetative life planted in a growing medium on top of a waterproof membrane. This single-ply laminate is used for other things such as boats and ponds. Glass reinforced polyester is a roofing material made of polyester and fiberglass. Requires a protective membrane to reflect the heat and UV raysĬost: $5-$12 per square foot (including labor) Glass Reinforced Polyester (GRP) Photo Credit: Crownbuild / Wikimedia Commons / CC BY-SA 3.0.Heat absorption increases energy bill expenses.Heat absorption increases home indoor temperatures.Durable not easily scratched or punctured.EPDM roofing comes in either black or white, and the roofing material is held to the roof deck with either glue or fasteners. Rubber roofing such as EPDM lasts 10 to 50 years. With a name that is difficult to say, ethylene propylene diene monomer synthetic rubber is one of the cheapest roofing materials on the market and the most common commercial flat roof materials. Porous substance that may be susceptible to leaksĬost: $4-$8 per square foot (including labor) Ethylene Propylene Diene Monomer (EPDM) Photo Credit: Doralin Tunas / Canva Pro / License.Concrete roofs are constructed of multiple layers: the concrete slab, the vapor layer, and the insulation layer, which is covered with polyurethane film. The material is a combination of sand, cement, and water. While most people might think of sidewalks and driveway pavement when they think of concrete, concrete is also a roofing material. Over time, the top gravel layer will show signs of wear and tear, and it can be replaced.Ĭost: $3-$8 per square foot (including labor) Concrete Roofs Photo Credit: Dangphoto2517 / Canva Pro / License As the name suggests, BUR is built of layers of tar and roofing felt topped with several layers of gravel. Known as tar and gravel roofing, this style of roofing has been used for over 100 years, making built-up roofing the oldest type of flat roofing. Built-Up Roofing (BUR) Photo Credit: Baloncici / Canva Pro / LicenseĪs the most common type of flat roofing, built-up roofing is a popular choice for homeowners. Instead, there are many other types of materials used on flat roofs. 10 Types of Flat Roof MaterialsĮven though asphalt shingles are the most common roofing material for pitched roofs, flat roofs cannot have asphalt shingles installed over them. Water sitting on a roof will damage the roofing and cause leaks. If a flat roof were completely flat, this would create a problem with ponding water on the roof. The reason flat roofs are set at a slight angle is to help with drainage. A flat roof is a low-slope roof tilted at less than 10 degrees. Some might assume that a flat roof is completely flat with no angle. Ethylene Propylene Diene Monomer (EPDM). ![]()
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