Flat roofs are a popular choice for commercial buildings because they are generally more affordable, provide more usable space on the roof for equipment like HVAC units, are easier to access for maintenance, and offer flexibility in design compared to sloped roofs.
This article will provide a crash course in flat roofs including the types of flat roof materials so you can make a decision that is best for you.
Flat roofing refers to a type of roofing system that has a minimal slope, usually less than 10 degrees, and is generally used in commercial and industrial buildings.
Flat roofs offer several advantages over more traditional, pitched roofing systems.
Built-up roofing, also known as BUR, is a traditional flat roofing material that consists of multiple layers of asphalt and felt or fiberglass mats. This type of roofing is installed using several layers of roofing felt then topped with a layer of gravel or a reflective coating. It is also known as “tar and gravel.” BUR is an affordable and durable option that can last up to 30 years with proper maintenance.
Modified bitumen roofing is a type of asphalt roofing that has been modified with rubber or plastic additives to improve its flexibility and durability. It comes in rolls that are applied to the roof with heat or adhesives. Modified bitumen roofing can last up to 20 years.
Thermoplastic Olefin (TPO) roofing is a single-ply roofing membrane made from a blend of rubber and plastic materials. It is lightweight, durable, and resistant to UV rays, punctures, and chemicals. TPO roofing can last up to 30 years.
Ethylene Propylene Diene Monomer (EPDM) roofing is a single-ply roofing membrane made of a synthetic rubber material. It is durable, weather-resistant, and can withstand extreme temperatures.
EPDM roofing has a lifespan of approximately 20-30 years and is relatively easy to maintain and repair. It is also eco-friendly as it is made of recycled materials and it is highly resistant to ozone and UV rays, making it very energy efficient.
Polyvinyl Chloride (PVC) roofing is a single-ply roofing membrane made of a synthetic plastic material. It is durable, fire-resistant, and resistant to chemicals and UV rays. PVC roofing can last up to 30 years.
Choosing the right material depends on various factors, including budget, climate, and building use. Built-up roofing and modified bitumen roofing are traditional and affordable options, while TPO, EPDM, and PVC roofing offer greater durability and resistance to weather and chemicals.
With 60+ years experience, Besroi Roofing & Siding can evaluate your roofing needs and recommend the best flat roof material. Get a free quote today!