Choosing a flat roof for your business involves research, especially if you want a roof that is durable and can last for years. While there are many types at your disposal, four commercial flat roofs stand above the rest.
1. Metal Roofs
Metal flat roofs are a popular choice due to their durability and longevity. These roofs are constructed from metals such as aluminum, steel, and copper, which allows them to withstand harsh environmental conditions. Whether your business is in a region that experiences lots of snow, hail, heat waves, or rain storms, your metal roof can provide excellent protection.
Metal is naturally resistant to a lot of damage from direct impacts. This resilience means they maintain their structure over the years, reducing the need for repairs. In addition, metal roofs have a longer lifespan compared to other types of roofs. While asphalt shingles last about 20—30 years, metal flat roofs can last for 50 years or more.
Metal roofs have an additional advantage. They are resistant to mold, fire, rot, and damage from insects. Their resistance to fires makes them especially beneficial in wildfire zones, and their resistance to mold is a huge advantage in humid climates.
Furthermore, metal roofs require little maintenance compared to other roofing materials. While we still recommend an annual inspection, the lower maintenance requirements translate to more savings over time.
2. TPO/PVC (Single-Ply Membranes)
Single-ply membrane flat roofs are typically used for commercial and industrial spaces due to their durability, longevity, and flexibility. The most common types are TPO (thermoplastic polyolefins) and PVC (polyvinyl chloride).
TPO flat roofs are made from rubber and other materials. This results in a roof that can withstand a variety of harsh weather, such as strong winds, UV exposure, and rainstorms. The TPO material is also resistant to chemical damage, tears, and punctures; and roofers can purchase them in different grades and thicknesses.
PVC roofs offer the same benefits as TPO roofs. PVC is a synthetic material, and PVC roofs are often reinforced with other materials, such as fiberglass or polyester. Both TPO and PVC roofs are installed in one single layer, minimizing weak points and the number of seams. In addition, single-ply membrane roofs can be welded together to create a watertight seal.
Like metal roofs, these roofs are also low maintenance. They are resistant to mold and algae, making them beneficial in areas that get lots of rain. They are also known as “cool roof options” as light-colored single-ply membrane roofs reflect sunlight, thus absorbing less heat. TPO and PVC flat roofs have a lifespan of about 25-40 years.
3. Built-Up Roof Systems (BUR)
BUR flat roofs are also referred to as gravel or tar roofs, and they are made up of layers of a sticky, black, viscous form of petroleum, known as bitumen. The bitumen layers are alternated with materials such as fiberglass which creates a strong waterproof roofing material.
BUR roofs stand out because of their durability. If the top layer is damaged, the layers below will continue to protect the building. BUR roofs are also resistant to damage from hail, foot traffic, and other impacts. The thick layers create a protective barrier, preventing tears or punctures.
BUR flat roofs can also adjust with how buildings move. Flat roofs expand and contract due to temperature changes, and BUR roofs can adapt to these changes without their structures weakening or deteriorating.
Finally, due to the multiple layers of bitumen, these roofs are fire-resistant. Their fire-resistant quality can help protect customers and employees in the event of a fire. BUR flat roofs have a lifespan of about 20-30 years.
4. Modified Bitumen Roofing (Mod Bit or MB)
Another option is the modified bitumen roof or Mod Bit flat roof. This type of roof is a modernized version of the BUR roof, and it is constructed with modified bitumen and polymers to create a durable surface. One of its properties is elasticity, which allows it to expand and contract with temperature changes without cracking. Moreover, its multiple layers give this roof additional strength. These layers are reinforced with polyester and fiberglass, making them resilient to hail, harsh weather conditions, and heavy foot traffic.
Another advantage to using Mod Bit flat roofs is their resistance to UV radiation. Many roofers coat the top layer with reflective materials that can help deflect sunlight, thereby reducing heat absorption. They are also waterproof as the layers are sealed using heat-welding techniques, creating a watertight barrier. The asphalt-based membrane is water-resistant, too. Mod Bit roofs typically last for about 20 years.
If you are thinking about installing or replacing your commercial roof, turn to Universal Roofing Specialists LLC. We are a family-owned and -operated company serving the residents in and around Maricopa, Arizona. We can repair, install, and maintain your commercial, industrial, or residential roof. We can also help with your roof insurance claims. Contact us to request a quote.