Chicago loves flat roofs

we know it best in chicagoland.

View of a flat rooftop with HVAC units, vents, and pipes, with a cityscape of residential and commercial buildings under a cloudy sky in the background.

Flat roofing systems are one of the most common roofing structures found throughout Chicago, especially on multi-unit residential buildings and commercial properties. Many of the buildings across the city were constructed in the early 1900s and were designed with flat roof structures that allowed for efficient drainage and practical construction methods.

Originally, many of these roofs were built using layered tar and gravel systems or early built-up roofing materials. Over time, roofing technology has evolved and modern flat roofing systems now offer stronger waterproofing, better insulation options, and improved durability against the harsh Chicago climate.

At Chuni Roofing, we work with both traditional and modern flat roofing materials. Our team installs, repairs, and maintains roofing systems designed to withstand Chicago’s heavy rain, snow, temperature swings, and seasonal freeze-thaw cycles.

Flat roofing systems we commonly work with include:

• modified bitumen roofing systems
• TPO (thermoplastic polyolefin) roofing systems
• EPDM rubber roofing systems

Modified bitumen has been a trusted roofing material for decades due to its durability and layered waterproofing design. TPO systems provide strong energy efficiency and reflective surfaces that help reduce heat absorption. EPDM rubber roofing offers flexibility and long-term weather resistance.

White flat roof with trees and blue sky in the background.
Flat rooftop with a metal roof section and a sealed rubber membrane surface, with HVAC equipment labeled Trenton and a metal roof vent in the background.

  • A durable synthetic rubber roofing membrane commonly used on commercial and residential flat roofs. EPDM is known for its flexibility, UV resistance, and ease of installation. It’s cost-effective and typically lasts 20–30 years with proper maintenance.

  • A single-ply roofing membrane that’s energy-efficient and resistant to UV rays, punctures, and chemical exposure. TPO roofs are heat-welded for a strong, seamless finish and are a popular choice for eco-conscious property owners. Lifespan ranges from 20 to 30 years.

  • Durable and weather-resistant flat roofing system designed for both commercial and residential buildings. It is installed in layers for long-lasting protection. Provides excellent resistant to extreme temperatures, UV rays, and heavy foot traffic!