COMMERCIAL-GRADE FLAT AND LOW-SLOPE ROOFING FOR THE TWIN CITIES
FLAT ROOF SPECIALIST
David Armenta Magana built his roofing career at one of the largest commercial roofing companies in the country. That background means every flat or low-slope roof Altus installs is held to a commercial standard: proper drainage, correct membrane selection, and a finish that holds up through Minnesota winters.
Flat Roof Expertise Built on Commercial Experience
When a flat or low-slope roof fails, the cause is almost always the same: the wrong membrane, a bad seam, or drainage that was never designed to handle Minnesota's freeze-thaw cycles. David Armenta Magana spent years working for one of the largest commercial roofing companies in the country before founding Altus. That background is why Altus approaches every flat roof, residential or commercial, with the same discipline a large-scale project demands.
Altus installs [TPO roofing](/services/tpo-roofing), [EPDM rubber roofing](/services/epdm-rubber-roofing), [PVC roofing](/services/pvc-roofing), and modified bitumen systems across the Twin Cities. Each membrane has a different performance profile. TPO reflects heat and welds at the seams. EPDM is flexible and proven in cold climates. PVC handles chemical exposure and high-traffic rooftop areas. Modified bitumen is a reliable choice for low-slope residential and smaller commercial buildings. David selects the system that fits your building, not the one that is easiest to install.
What a Flat Roof Specialist Actually Does Differently
A generalist roofer can lay a membrane. A specialist understands why drainage matters more than the membrane itself, how seam failures start, and what flashing details protect a roof for 20 years instead of five. David walks every roof before writing a proposal. He checks slope, existing drainage paths, penetrations, and any areas where water is already pooling. That inspection shapes the entire scope of work.
Altus is certified through GAF, Mule-Hide, and GenFlex: the manufacturer relationships that back the systems David installs.
Flat Roof Repair and Replacement Across the Twin Cities
Altus handles flat roof repairs including seam failures, flashing leaks, ponding damage, and storm punctures, as well as full replacements when a membrane has reached end of life. If your building has taken hail or wind damage, David can also assist with the [insurance claim process](/services/storm-damage), including meeting your adjuster on-site.
The service area covers the Twin Cities metro and surrounding suburbs: St. Louis Park, Minneapolis, Plymouth, Edina, Golden Valley, Maple Grove, Minnetonka, Hopkins, Wayzata, Eden Prairie, Bloomington, St. Paul, and Brooklyn Park. If you are within roughly 100 miles of the metro, call and ask.
Pricing and the Altus Guarantee
Altus will beat any comparable written proposal. That commitment is paired with commercial-grade materials and workmanship, not a lower-cost membrane or a faster crew. The goal is a roof that does not need to be revisited in three years.
Financing is available for residential projects. A $1,000 referral bonus applies when a referral results in a completed job. Veterans and active-duty Army members receive a discount.
David and the Altus team are bilingual in English and Spanish. If you prefer to discuss your project in Spanish, that is a real option, not a marketing note.
For flat roof repair, replacement, or a second opinion on a proposal you have already received, start with a free estimate. David will walk the roof and give you a straight answer on what it needs.
See also: [commercial flat roofing services](/services/commercial-flat-roofing) and [roof repair across the Twin Cities](/services/roof-repair).
WHY ALTUS
WHY ALTUS FOR
FLAT ROOF SPECIALIST
TPO, EPDM, PVC, and modified bitumen systems
Correct membrane matched to your roof slope and use
Commercial-grade installation on every job, residential or commercial
Owner David on-site for inspection and sign-off
GAF, Mule-Hide, and GenFlex certified systems
Bilingual service in English and Spanish
Veteran discount available
$1,000 referral bonus
SCOPE OF WORK
WHAT'S INCLUDED
THE PROCESS
HOW IT WORKS
Simple, transparent, owner-managed from the first call to the final handshake.
David walks the roof and assesses slope, drainage, existing membrane condition, and any ponding or seam failures.
TPO, EPDM, PVC, or modified bitumen: David recommends the system that fits your building, budget, and climate exposure.
A detailed written proposal. Altus will beat any comparable written proposal on price without cutting corners on materials or labor.
Commercial-grade installation with proper seaming, flashing, and drainage. David is on-site throughout.
David reviews the finished roof with you before the job is closed out.
QUESTIONS
COMMON QUESTIONS
Altus installs TPO, EPDM rubber, PVC, and modified bitumen membranes. David will recommend the right system based on your roof slope, building use, and budget.
Yes. Altus handles commercial flat roofing, low-slope residential roofs, and multi-unit buildings. David's background is in large-scale commercial work, and that standard applies to every job.
David inspects the roof in person and walks you through the options. Membrane choice depends on slope, drainage, existing substrate, and how the building is used. There is no one-size answer.
Yes. Altus repairs seam failures, flashing leaks, ponding issues, and storm damage on existing flat roofs, and handles full replacements when the membrane has reached end of life.
Altus serves the Twin Cities metro and surrounding suburbs within roughly 100 miles, including St. Louis Park, Minneapolis, Plymouth, Edina, Golden Valley, Maple Grove, Minnetonka, Hopkins, Eden Prairie, Bloomington, and St. Paul.
EXPLORE MORE
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READY TO START?
GET YOUR FREE ROOF INSPECTION TODAY
Tell us about your roof. We will document it, walk you through the options, and give you a written estimate the same week.
