Commercial Roofing
From single-tenant storefronts to warehouses and office buildings, we install, restore, and maintain low-slope and flat commercial roofs across Greater St. Louis and St. Charles County - with as little disruption to your operation as possible.
A roof your tenants and customers never have to think about
A commercial roof is a different animal from a house. The slopes are low, the membranes are wide, the drainage is engineered, and a single leak can take out inventory, ceiling tiles, or a server room overnight. Correll Roofing has spent 20+ years and 5,000+ roofs learning how to keep flat and low-slope systems watertight through Missouri's hail, wind, and freeze-thaw swings - and how to do the work without shutting your building down.
Low-Slope & Flat Roofs
Membrane systems sized to your building's drainage, traffic, and exposure - not a residential mindset applied to a commercial deck.
Maintenance & Restoration
Scheduled inspections and coatings that stretch the life of a sound roof for years before a full replacement is ever on the table.
Minimal Downtime
Phased schedules, off-hours work, and tidy staging so your doors stay open and your team keeps working through the project.
The right membrane for the building
There is no single best commercial roof - only the best fit for your structure, budget, and how the building is used. Here are the low-slope systems we install and service most across the metro.
TPO Membrane
A bright white, heat-welded thermoplastic that reflects summer sun, keeps cooling loads down, and seals into one continuous sheet. A go-to for newer warehouses, retail, and offices that want energy savings.
EPDM Rubber
A proven, flexible rubber membrane that handles temperature swings and ponding without getting brittle. Decades of field history make it a dependable choice for large, simple roof planes.
Modified Bitumen
Multi-ply, torch- or self-adhered asphalt sheets that add real toughness underfoot. Ideal where rooftop foot traffic, equipment, and service crews are a daily reality.
Commercial Metal
Standing-seam and metal panel systems for sloped commercial structures that want the longest service life and a clean, durable finish. See our metal roofing page for the full lineup.
Not sure whether your building qualifies as flat or low-slope? Our dedicated flat roofing page digs into drainage, membranes, and ponding for buildings with little to no pitch.
Restore the roof you have before you replace it
A leaking commercial roof doesn't always need a full tear-off. When the deck and insulation are still sound, a restoration - cleaning, reinforcing seams, and applying a reflective coating - can add years of waterproof life for a fraction of replacement cost, often with little to no disruption inside. When the substrate is wet or the membrane is past saving, we'll tell you straight and lay out a re-roof plan instead.
- Restoration coatings that renew and reflect, extending a sound roof's service life.
- Full re-roof with tear-off and new membrane when restoration won't hold.
- An honest recommendation backed by a thorough roof inspection - not an automatic upsell.
- Budget clarity on both paths, so you can plan capital spending with real numbers.
Spend where it counts
Replacing a roof that only needs a coating wastes capital; coating a roof that needs replacing wastes time and risks your inventory. The whole point of our assessment is to put your dollars in the right place.
Catch small problems before they close your doors
The cheapest commercial roof repair is the one you make before the leak. Our scheduled maintenance programs put eyes on your roof on a regular cadence - clearing drains, resealing flashings and penetrations, checking seams around HVAC curbs, and documenting condition with photos. For property managers and owners, that means fewer emergency calls, a longer roof life, and a paper trail that helps at budget and warranty time.
- Scheduled inspections timed around spring storm season and winter freeze-thaw.
- Drain, seam & flashing care - the spots where flat roofs almost always fail first.
- Photo-documented reports you can file for warranties, lenders, and capital planning.
Why flat roofs need a schedule
Water doesn't run off a low-slope roof the way it does a steep one - it lingers, finds the weak seam, and works in. Regular visits keep drains clear and seams sealed so small issues never become a closed storefront.
Your commercial project, step by step
On-Site Assessment
We walk the roof, check drainage, probe for trapped moisture, and document every penetration and seam - then give you a clear read on repair, restore, or replace.
Scope & Proposal
You receive an itemized proposal with the recommended system, a phasing plan, and a timeline built around your business hours - plus insurance coordination if storm damage is involved.
Low-Disruption Install
Our crew stages cleanly, works in sections, and can schedule around off-hours so customers, tenants, and staff keep moving while the roof goes on.
Final Walk & Warranty
We flood-test or inspect the finished system, clean the site top to bottom, and register your manufacturer and workmanship warranties before we hand it back.
Hail and wind hit commercial roofs too
Missouri's spring and summer storms bruise membranes, tear flashing, and back up drains on commercial buildings just as they do on homes. When that happens, you don't want to fight an adjuster alone.
We Work With Your Insurer
Correll Roofing works directly with your insurance company on storm and hail claims - meeting the adjuster on the roof and documenting the damage so the claim reflects the true scope of loss.
Thorough Documentation
Dated photos, measurements, and a written condition report give your claim - and your records - the backbone they need at decision time.
Fast Leak Response
An active leak over your stock or equipment can't wait. We move quickly to stop the water, then plan the permanent repair - explore our emergency roof repair for urgent help.
Commercial roofing questions, answered
Protect your building with a free roof assessment
Tell us about your property and we'll walk the roof, document its condition, and lay out your best path forward - no pressure, no obligation.