Chicago has more flat roofs per capita than almost any American city — two-flats, three-flats, courtyard buildings, mixed-use storefronts, and almost every commercial property. Flat roofs are an entirely different discipline from shingles. We install and repair EPDM (rubber), TPO, PVC, and modified bitumen systems.
At The Chicago Roofers, flat roofing is one of our core specialties. Chicago is unlike any other roofing market in the country — a city built on a mix of 1890s greystones, 1920s bungalows, mid-century brick two-flats, modern infill, and dense commercial corridors, all sitting in a climate that swings from 95°F summer humidity to -20°F winter wind chills. A roofing contractor who treats Chicago the same as a suburban tract neighborhood will miss the details that actually keep water out of these buildings. We don't. Every flat roofing project we take on is scoped, priced, and executed around the specific building era, roof geometry, and microclimate of the property in front of us.
What's Included
- EPDM rubber single-ply roofs
- TPO and PVC heat-welded systems
- Modified bitumen torch-down and self-adhered
- Roof drain, scupper, and overflow rebuilds
- Parapet wall flashing and coping
- Tapered insulation to fix ponding
Why It Matters in Chicago
Chicago flat roofs ride brutal freeze-thaw cycles and standing snow loads. Our detailing around parapets, scuppers, and brick walls is what separates a 25-year flat roof from a 10-year one.
Chicago's combination of lake-effect moisture, sustained winter freeze cycles, and aggressive summer storm patterns means that roofing problems that would take a decade to develop in a milder climate can show up in three or four years here. That's why our approach to flat roofingis built around durability-first detailing — heavier ice-and-water shield coverage, properly terminated parapet flashings, balanced attic ventilation, and material specifications that exceed code minimums in the spots that matter most.
Materials & Systems We Use
For Chicago flat roofing projects, we work exclusively with established, manufacturer-backed systems: architectural asphalt shingles from GAF, Owens Corning, and CertainTeed; standing-seam and stone-coated metal panels rated for Chicago wind zones; EPDM, TPO, and PVC single-ply membranes for flat assemblies; and SBS-modified bitumen where torch-down or self-adhered low-slope systems make sense. We carry manufacturer certifications that unlock extended warranties most contractors can't offer, and we register every warranty in the property owner's name so it transfers cleanly at sale.
Chicago Code, Permits & Inspections
Any meaningful roofing scope in Chicago triggers a Department of Buildings permit. We pull the permit in our name, post it at the property, coordinate the inspector visit, and close the permit when work is complete — a step that protects you when you sell. For landmark districts, designated historic properties, and HOA-governed buildings, we navigate the extra approval layer so your project doesn't get red-tagged. Our crews work to the most recent Chicago energy and building code revisions, including reflectivity requirements on low-slope roofs and ventilation balance rules on steep-slope assemblies.
Our Process
- 1
Survey
We inspect membrane, seams, drains, and parapet conditions.
- 2
Design
We recommend system, insulation R-value, and drainage corrections.
- 3
Install
Tear-off or recover, dependent on existing assembly.
What to Expect on Project Day
Crews arrive between 7 and 8 a.m. with a project lead who walks you through the day's plan, protects landscaping and the building exterior with tarps and plywood, and stages dumpsters and materials with the smallest practical street footprint — a real concern on narrow Chicago lots and tight alley access. Magnetic nail sweeps run multiple times per day, every day, including final cleanup. We leave the property cleaner than we found it.
Across Every Chicago Neighborhood
We provide flat roofing in every Chicago neighborhood — from the dense flat-roof corridors of Logan Square and Pilsen, to the bungalow belts of Portage Park and Chatham, to the lakefront high-rises of Edgewater. Local building stock, microclimate, and even prevailing wind direction all change how we approach the work.
Frequently Asked Questions
EPDM, TPO, or modified — which is best?
Depends on the building. EPDM is forgiving and long-proven. TPO is reflective and code-favored. Modified bitumen is bulletproof on smaller roofs. We recommend based on your specific building.
Why does my flat roof pond water?
Original framing slope was inadequate, or the deck has sagged. Solution is tapered insulation to recreate positive drainage.