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Updated June 2026

Best Flat & Low-Slope Roofing Contractors in Madison

Compare services, check credentials, and contact a roofing company directly.

How we choose

5 results

Compare contractors (5)

Quick Comparison

Rank Company Specialty Experience BBB Website
1 Frey Construction & Home Improvement Residential Roofing & Exteriors Since 1995 — Visit
2 Southern Wisconsin Roofing Co., Inc. Most Established Since 1937 — Visit
3 Ganser Company, Inc. Roofing & Home Remodeling Since 1939 — Visit
4 Maly Roofing Company, Inc. Commercial, Flat & Green Roofing Since 1988 A+ (Not Accredited) Visit
5 DuraShield Roofing & Contracting Residential & Commercial Roofing Since 2003 — Visit

Detailed Reviews

#2

Southern Wisconsin Roofing Co., Inc.

Most Established
ExperienceSince 1937 (85+ Years)
BBB Status—
SpecialtyResidential & Commercial Roofing
Service AreaMadison & Southern Wisconsin
Services and company details

Headquartered on Kingsley Way in Madison, Southern Wisconsin Roofing has served the region since 1937, making it one of the longest-operating roofing companies in the metro. The company handles new construction, re-roofing, tear-offs, single-ply, and built-up roofing systems using a range of top brand materials, and lists itself as a GAF residential roofer.

Roof Replacement Re-Roofing Roof Tear-Offs Single-Ply Roofing Built-Up Roofing New Construction Roofing Roof Maintenance
#3

Ganser Company, Inc.

Roofing & Home Remodeling
ExperienceSince 1939 (80+ Years)
BBB Status—
SpecialtyRoofing & Home Remodeling
Service AreaGreater Dane County
Services and company details

Based in McFarland, Ganser Company has served the Greater Dane County area since 1939, giving it more than 80 years of roofing and remodeling history around Madison. The company installs asphalt, cedar shake and shingle, and flat roofing and uses GAF roofing products along with Velux skylights, Provia doors, and Marvin Infinity windows for full-exterior projects.

Asphalt Roofing Cedar Shake Roofing Flat Roofing Roof Replacement Skylight Installation Windows Home Remodeling
#4

Maly Roofing Company, Inc.

Commercial, Flat & Green Roofing
ExperienceSince 1988 (37+ Years)
BBB StatusA+ (Not Accredited)
SpecialtyCommercial, Flat & Green Roofing
Service AreaMadison & Neighboring Communities
Services and company details

Operating in Madison since 1988, Maly Roofing focuses heavily on commercial flat roofing, green roofs, and sheet metal work alongside residential installation and tear-offs. It is a member of the National Roofing Contractors Association and Associated Builders and Contractors, and holds Firestone Master Contractor, GAF, and CertainTeed credentials, working with systems such as Carlisle SynTec, Versico, and Johns Manville. Maly carries an A+ BBB rating but is not BBB accredited.

Commercial Flat Roofing Green Roof Installation Sheet Metal Roofing Roof Replacement Roof Tear-Offs Single-Ply Roofing Paver Installation
#5

DuraShield Roofing & Contracting

Residential & Commercial Roofing
ExperienceSince 2003 (20+ Years)
BBB Status—
SpecialtyResidential & Commercial Roofing
Service AreaMadison & Surrounding Dane County
Services and company details

Serving Wisconsin since 2003 and based in Middleton (Wisconsin license #1024749), DuraShield Roofing installs an unusually broad range of materials including asphalt, metal, flat TPO/EPDM, cedar shake, slate, tile, and DaVinci composite products. The company is both GAF and Owens Corning certified and partners with DaVinci and Ludowici, handling residential and commercial roofing plus storm damage work across Dane County.

Roof Replacement Roof Repair Slate & Tile Roofing Cedar Shake Roofing Metal Roofing Flat Roofing Storm Damage Repair Roof Inspection

Madison's Freeze-Thaw Cycle and Why It Defines Flat-Roof Performance in Wisconsin

Your building experiences interior water intrusion during spring snowmelt

Madison's most problematic flat-roof failure pattern is not winter leaking but spring melt infiltration, when ice dams built up over the winter begin releasing and water backs up at blocked or frozen drains. If you're seeing interior staining or drips in March and April, the underlying issue is almost always a combination of inadequate drainage slope and drain system icing — problems a flat-roof specialist can diagnose and address in the spring before the next cycle begins.

You're managing a commercial building with multiple tenants and need minimal disruption

Flat-roof replacement on an occupied Madison commercial building requires careful scheduling around the short Wisconsin construction season and tenant operations. Experienced flat-roof contractors in Madison work with building managers to sequence the job in sections, maintaining weather-tight conditions at all times, and typically plan completion before October when adhesive temperatures become a limiting factor.

Your institutional or municipal building is procuring through a formal bid process

Madison's significant institutional building stock — schools, county facilities, university ancillary buildings — typically procures roofing through formal bid processes with detailed specifications. Flat-roof contractors experienced with Wisconsin public procurement understand the documentation, bonding, and prevailing-wage requirements involved, and can produce the submittals and inspection reports that close out institutional contracts properly.

Frequently Asked Questions

How many flat & low-slope roofing contractors are in Madison?

Our directory lists 5 independently verified flat & low-slope roofing contractors serving Madison, Wisconsin, ranked by experience, certifications and reputation. Frey Construction & Home Improvement is ranked #1.

How do I choose a flat & low-slope roofer in Madison?

Confirm licensing and insurance for Wisconsin, ask for flat & low-slope project references in Madison, get multiple written quotes, and check each contractor's BBB standing. Every company listed here has been independently researched.

Which flat-roof membrane performs best in Madison's cold climate?

EPDM has a long track record in cold climates because it remains flexible at temperatures well below freezing, reducing the brittle failure risk that plagues some thermoplastic membranes in extreme cold. TPO formulations have improved significantly and also perform well in Wisconsin winters. SBS-modified bitumen remains the preferred choice on complex roofs with many penetrations because its two-ply construction and hot-mopped or torch-applied seams are easy to detail precisely around obstructions.

Do Madison flat-roof projects require city building permits?

The City of Madison requires building permits for commercial re-roofing projects that involve structural changes or significant scope. Full membrane replacements on commercial buildings generally trigger the permit requirement; surface maintenance and minor repairs typically do not. The City of Madison Building Inspection Division provides guidance on which projects require permits — confirming before starting protects both owner and contractor from compliance issues.

How should I evaluate a flat-roof contractor's bid for a Madison commercial building?

Beyond price, the critical elements to compare are: the membrane manufacturer and system being specified; whether the contractor is certified by that manufacturer to issue a full system warranty; the insulation R-value being installed and whether it meets current Wisconsin Energy Code minimums; and the drainage strategy for your specific deck slope. A detailed written specification that answers these questions clearly is the baseline for any credible flat-roof bid in Madison's market.