TPO Membrane
Heat-welded seams and a reflective white surface cut summer cooling load. It’s the most-specified flat roof today.
Commercial & Low-Slope Roofing
Commercial Roofing Contractors in the Twin Cities
Flat and low-slope roof replacement, repair, and restoration engineered for Minnesota. TPO, EPDM, PVC, metal, and coatings, installed in-house by a GAF Certified contractor.
GAF CertifiedOwens Corning CertifiedBBB A+4.9★ / 72 reviewsMN GC #BC76063820+ years experience
Minnesota commercial roofs take a beating — roughly −30°F to 95°F and 45–60 freeze-thaw cycles a year, with snow that sits and drifts. The system you choose and the crew who installs it decide whether your roof lasts 15 years or 40. We handle it all in-house: assessment, tear-off or recover, installation, and long-term maintenance.
Commercial Roofing Systems We Install
We match the membrane to your building, budget, and how your roof actually performs in Minnesota.
EPDM (Rubber)
Synthetic rubber that stays flexible in deep cold, with excellent freeze-thaw life, routinely 40–50 years here.
PVC Membrane
Welded seams with superior chemical and grease resistance. It’s the pick for restaurants and ponding-prone roofs.
Modified Bitumen
Tough, multi-ply asphalt with built-in redundancy. Ideal for small, complex, or high-traffic roofs.
Built-Up & Ballasted
Multi-ply built-up roofing finished with river-rock ballast that shields the membrane from UV and wind.
Standing-Seam Metal
Sheds snow, lasts decades, and makes a statement on steeper commercial slopes.
Roof Coatings & Restoration
Fluid-applied silicone or acrylic that seals and extends a sound roof. A lower-cost alternative to tear-off.
Spray Foam (SPF)
Seamless spray-applied polyurethane foam that insulates and waterproofs in one monolithic layer, self-flashes around every penetration, and can be re-coated to renew. Ideal for irregular or low-slope roofs.
Not sure which system fits your building?
We’ll inspect, core-test for moisture, and give you straight answers.
How the Membrane Is Attached
Mechanically Attached
Fasteners and plates lock the membrane to the deck. It’s the fastest, most economical option for most buildings.
Fully Adhered
Membrane bonded to the substrate for a smooth look and strong wind-uplift resistance, and it goes down cold with adhesives.
Ballasted
Washed river rock or pavers hold the membrane down and shield it from UV. Common on existing built-up decks.
Roof Drainage
A flat roof lives or dies by how fast it sheds water. We engineer positive drainage so nothing sits, freezes, or voids your warranty.
Internal Drains
Primary drains piped inside the building. They’re the workhorse of flat-roof drainage, and far less freeze-prone than exterior lines in Minnesota.
Scuppers & Overflow
Secondary and overflow scuppers set 2–4″ higher kick in if a primary drain clogs. It’s required redundancy for peak storms.
Tapered Slope & Crickets
Tapered insulation builds a 1/4″-per-foot slope to the drains, with crickets steering water around units. No ponding.
Cold-Climate Detailing
Heat cable, oversized overflows, and clear drain paths keep scuppers and drains from ice-damming through our winters.
Parapet Walls & Decorative Metal
Parapet walls do a lot of quiet work on a commercial roof, and they’re also where the building shows its style.
- Cut wind uplift — they deflect wind at the roof edge and protect the membrane perimeter.
- Fire separation — a code barrier between rooftop and adjacent spaces.
- Fall safety — a guard for crews and technicians working on the roof.
- Hide rooftop equipment — conceal HVAC and vents for a clean, finished look.
We cap and waterproof them with custom-fabricated metal coping (24–26 ga pre-painted steel that resists corrosion, water, and fire) tied into counter-flashing. We also offer decorative architectural metal to turn a plain parapet into a sharp, branded roofline.
Commercial Roof Repair & Maintenance
Not every roof needs replacing. We repair leaks, failed seams, flashing and drain problems, storm damage, and ponding, and we offer preventive maintenance plans that catch small issues before they become five-figure ones and keep your manufacturer warranty intact. Start with a free commercial roof inspection.
Emergency leak? We respond fast across the Twin Cities to dry-in and stop the damage. Storm & restoration →
What to Expect — Our Process
From the first walkthrough we guide you through system and spec selection, write a clear itemized proposal, and handle every logistic — permits, the crane and material staging, the dumpster, and old-material removal — so your building keeps running while we work.
1
Site visit & moisture survey
We inspect, core-test for wet insulation, and define the exact scope.
2
Itemized proposal
A clear, line-by-line scope and price, with no surprises.
3
Permits
We pull every required city permit before work starts.
4
Crane & staging
Materials lifted and staged off the deck so it’s never overloaded.
5
Tear-off or recover
Remove to the deck (or recover a sound roof) and address wet insulation.
6
System install
Tapered insulation to code, membrane, and detailed flashings.
7
Inspections
We coordinate any in-progress check and the final city inspection.
8
Quality check & warranty
Final QA walk, full cleanup, and we register your manufacturer warranties.
Typical Timeline
About 5–7 working days for a typical 20,000 sq ft roof, weather permitting.
Permits
MN State Building Code requires a permit for commercial roofing, and we pull it. Licensed MN contractor #BC760638 (verify at DLI).
Inspections
A final city inspection, plus any required in-progress check of the assembly, all coordinated by us.
Built for the MN Season
Membrane welding and adhesives have temperature limits, so we schedule around cold and snow to make sure the roof bonds and lasts.
Built for Minnesota Code & Climate
Energy Code R-Values
We insulate to the 2024 Minnesota Commercial Energy Code, generally R-30 to R-35 above the deck.
Snow Load & Drainage
Tapered insulation and crickets move water to drains before it sits and freezes.
Ponding = Warranty Risk
Water standing 48+ hours voids most warranties, so we build positive slope to keep yours valid.
Freeze-Thaw Ready
We spec cold-flexible systems and welded or cold-adhered details for 45–60 cycles a winter.
Safety in Older Buildings
Asbestos & Lead — Handled the Right Way
Older commercial buildings can contain asbestos (old built-up roofing, flashing mastic, insulation) and lead paint. As an EPA Lead-Safe Certified Firm, we test (with an MDH-licensed inspector) or treat materials as presumed, and we bring in licensed abatement with proper MPCA notification before anything is disturbed. That keeps your tenants and our crew safe.
Roofing + Solar, All In-House
Have rooftop solar — or want it?
Our sister company iSolar means roofing and solar are handled together. Already have panels? We detach and reset them in-house to replace the roof underneath.
Reroofing is the best time to add solar. The crane and crew are already on site, which lowers combined cost and resets everything for 30+ years.
Done Right the First Time
Built to Last
We install premium systems to manufacturer spec so your roof lasts decades. Do it once, the right way.
GAF Certified
A certification only a small fraction of contractors hold. It qualifies you for the strongest commercial warranties.
Warranties in Writing
Manufacturer material warranties plus our own written workmanship warranty.
Support Before, During & After
One local team that answers the phone and stands behind the work long after the crew leaves.
Commercial Roofing FAQ
TPO, EPDM, or PVC — which is best for my building?
TPO is the popular, energy-efficient all-rounder; EPDM is the long-life cold-climate workhorse; PVC wins on ponding and grease/chemical exposure (restaurants). We recommend based on your roof, use, and budget.
Tear-off or recover?
If insulation is wet or there are already two layers, you need a full tear-off. If the roof is sound and single-layer, a recover is faster and cheaper, but you can only do it once.
What does a commercial flat roof cost?
It depends on size, system, tear-off vs. recover, insulation, and access. We give a clear, itemized quote after a free on-site assessment.
Does ponding water void my warranty?
Usually yes. Most manufacturers exclude water standing 48+ hours, so we build positive slope with tapered insulation to keep your warranty valid.
Can you replace a roof that has solar on it?
Yes. iSolar is our sister company, so we detach, reset, and reinstall panels in-house while we replace the roof.
Get a free commercial roof assessment
Tell us about your building. We’ll inspect it, give you straight answers, and send an itemized quote.