Flat Roofing Systems

Low-Slope & Flat Roofing

Chicago's extreme temperature swings—from subzero winters to 95-degree summers—demand flat roofing systems engineered for thermal cycling. Whether you're building a new roof deck, replacing aging membrane beneath an existing structure, or waterproofing a commercial low-slope roof, the membrane system you choose determines decades of performance. TPO, EPDM, modified bitumen, and PVC each excel in different applications, and selecting the wrong material for your specific exposure and use case leads to premature failure.

We evaluate every flat roof project for UV exposure, foot traffic patterns, mechanical equipment loads, and deck attachment requirements. TPO's heat-welded seams and reflective surface work well for roofs with heavy sun exposure, while modified bitumen's multi-layer redundancy handles high-traffic roof decks where penetrations and equipment mounting are common. EPDM remains proven for straightforward applications with minimal traffic. Our crews install all major membrane systems in-house—no subcontracted roofers—so every penetration, flashing, and termination bar meets the standards required for roof deck construction.

Your flat roof becomes more than weather protection—it's the foundation layer of your outdoor living space. When we handle both roofing and deck construction, membrane transitions integrate with sleeper systems, drainage paths align with deck pitch, and everything falls under coordinated warranty coverage. For commercial buildings, we provide energy-efficient cool roof options that can reduce HVAC loads and may qualify for utility rebates.