Commercial Flat Roof Replacement in Minnesota

When your commercial building, apartment complex, or multi-family property needs a flat roof replacement, you need it done right the first time. Bill Blazek Roofing brings 40 years of hands-on roofing experience to every job in Minnesota — full tear-off down to the decking, 45-mil rubber roofing, and a lifetime warranty most contractors simply cannot offer. Bill handles every consultation personally. We don’t ask for a single dollar until the job is complete and you’re satisfied.

Bill typically responds within one business day. If your flat roof is leaking or failing, you don’t have to wait long to get answers.

What Is Flat Roof Replacement?

• Flat roof replacement means removing all existing materials down to the structural decking, inspecting and repairing the base, then installing new insulation board, 45-mil rubber membrane, and steel edging.
• It is not a patch or coating over old materials — it is a complete system replacement backed by a lifetime warranty.
• If your building is leaking, your rubber membrane is pulling away from the metal, or your current roof is more than 15 years old, a full replacement is likely the right call.
  

  Flat Roof Replacement — At a Glance

  Detail	Info
  Process	Full tear-off, decking inspection, ISO board, 45-mil rubber, steel edging
  Material	45-mil EPDM rubber membrane + 24-gauge UNA-Clad G-90 steel, Kynar 500 finish
  Warranty	Lifetime
  Best For	Commercial buildings, apartment complexes, multi-family properties
  Service Area	Twin Cities, Scott County, Dakota County, Rice County, Minnesota
  Payment	No money down — we don’t collect until the job is done and you’re satisfied
  Response Time	Bill typically responds within one business day

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Our Flat Roof Replacement Process

Every flat roof we install follows the same six-step process. No shortcuts. No layering new materials over old ones. This is how a flat roof gets done right.

1. Full Tear-Off Down to the Decking Everything comes off. Old rubber, old insulation board, old metal. All of it is removed before anything new goes down.
2. Decking Inspection and Repair  We inspect every inch of the wood decking for rot, soft spots, and water damage. Any compromised boards are replaced before we move forward. This is the step most contractors skip, and why roofs fail early.
3. Fiberboard / ISO Board Installation  New fiberboard or ISO board is installed to create a stable, insulated base. An ISO board is used when code requires additional insulation, which is common in older Minnesota commercial buildings.
4. 45-Mil Rubber Membrane Installation We install a 45-mil EPDM rubber membrane — the only grade Bill puts down. Thick enough to handle Minnesota snow loads, freeze-thaw cycles, and hail. No coating, no spray system, no thin shortcuts.
5. 24-Gauge UNA-Clad G-90 Steel with Kynar 500 Paint Finish  Steel edging and flashing is installed using 24-gauge UNA-Clad G-90 steel with a Kynar 500 paint finish. This is the exact spec recommended by our steel supplier, not just ‘new steel,’ but material specified for durability and weather resistance.

Final Walkthrough with Bill: Bill personally walks through the completed job with you. Nothing is signed off until you are satisfied. No payment is collected until that moment.

Built for Commercial and Multi-Family Properties Across Minnesota

Bill Blazek Roofing specializes in commercial flat roof replacement for property managers, landlords, and building owners who need the job done right without disrupting tenants or operations. We work on apartment buildings, office complexes, retail properties, and larger commercial flat roofs across the Twin Cities metro and beyond.

When you call, you talk to Bill. When we show up, Bill is on the job. No salespeople, no subcontractors you have never met. That direct accountability is what building owners in Scott County, Dakota County, Rice County, and the Twin Cities have relied on for over 40 years.

We serve:

Shakopee, Burnsville, Apple Valley, Lakeville, Eagan, Prior Lake, Bloomington, Eden Prairie, Chanhassen, Minnetonka, St. Louis Park, Northfield, Faribault, Inver Grove Heights, Rosemount, and surrounding communities.

Lifetime Warranty on Every Flat Roof We Install

A lifetime warranty is only as good as the materials and installation behind it. That is why Bill only installs 45-mil rubber roofing the thickness and quality that makes a lifetime warranty possible. Most contractors offer 10 to 20 years. We offer a lifetime because we are confident in every job we put our name on.

40 years of Minnesota roofing experience means we have seen what fails and why. We build every flat roof to outlast the building owner’s need for another replacement. One investment. No repeat costs. No surprises.

How much does flat roof replacement cost in Minnesota?

Flat roof replacement cost depends on several factors: the size of the roof, how many stories up it is, the condition of the decking, and how much access is required. There is no one-size-fits-all number a large open commercial roof costs significantly less per square than a rooftop with obstacles, equipment, and difficult access. The best way to get an accurate number is a free walkthrough with Bill.

Frequently Asked Questions About Flat Roof Replacement

How quickly does Bill respond after I call?

Bill typically responds within one business day. If your roof is actively leaking or you’re dealing with an urgent situation, call directly, Bill handles every inquiry himself and will prioritize emergencies.

Do I need a full replacement or just a repair?

If your roof is rubber and the issue is isolated like flashing that has come loose a repair may be enough. If your roof is tar and rock, old asphalt, or has widespread fiberboard rot from years of water intrusion, it needs a full replacement. Not sure? Call Bill and he will give you an honest answer.

Can a flat roof handle Minnesota winters and hail?

Yes, when it is installed correctly with the right materials. A 45-mil rubber membrane is thick enough to handle Minnesota snow loads, freeze-thaw cycles, and hail impact. Hail bounces off. The membrane flexes through temperature swings without cracking. Thin materials and coatings do not perform the same way in a Minnesota climate.

What areas in Minnesota do you serve?

We serve commercial and residential properties throughout the Twin Cities metro and surrounding counties including Shakopee, Burnsville, Apple Valley, Lakeville, Eagan, Prior Lake, Bloomington, Eden Prairie, Chanhassen, Minnetonka, St. Louis Park, Northfield, Faribault, Inver Grove Heights, Rosemount, and the broader Scott, Dakota, and Rice County areas