A commercial flat roof replacement in Metro Detroit is custom-priced after an on-site assessment; final cost varies by roof system, scope, and building conditions. The biggest cost drivers are the membrane type (such as TPO or metal details) and required insulation thickness to meet code and performance.
Our teams regularly bid and install large flat roofs across the region, from 5,000 to 100,000+ square feet. Typical proposals account for deck condition, penetrations like HVAC curbs, drainage design, safety/access, and any tear-off or overlay strategy. A seasoned estimator will often core the roof to verify layers and moisture before finalizing numbers. For value protection, we offer an Apples to Apples low price guarantee and beat a comparable system quote by $50. The fastest way to get an accurate figure is to schedule a roof evaluation with measurements, cores if needed, and a defined scope.
- Key factors that move price: tear-off vs. overlay, tapered insulation/drainage needs, number of penetrations, deck repairs, edge/parapet details.
- What signals replacement over repair: widespread moisture in insulation, failing seams, trapped water, or structural deck issues.
- What improves pricing clarity: recent drawings, leak history, access notes, and desired warranty term.
Always request a written scope with materials, insulation R-value, and warranty terms before you approve work.
Updated: 2026-05-07
Need help in Birmingham, MI? Call (586) 300-4163 or book online. “Great service, speedy, and high quality roof replacement on our 8,700 sqft building… basically done in two days… not one issue since.” — Michael L.