Commercial Roof Repair

Stop Leaks, Reinforce Seams, and Protect Your Asset

Commercial roof repair is the first line of defense against water intrusion and structural damage. At Big River Roofing, we move quickly to identify the source of the leak – not just the drip point – and implement durable repairs that hold up against Midwest weather. We provide repair services for warehouses, manufacturing plants, retail centers, schools, and agricultural facilities throughout Illinois and Iowa.

Whether you have a single active leak or general wear around penetrations, our goal is to restore the watertight integrity of your system without unnecessary upselling. We work on all major commercial systems, including TPO, PVC, EPDM, metal, and modified bitumen.

If your roof has recurring leaks despite repairs, you may want to review our Commercial Roof Restoration or Full Replacements pages to compare long-term solutions.

For maintenance guidelines, refer to the National Roofing Contractors Association.

Common Commercial Roof Problems
We Fix

We address specific failure points that compromise commercial buildings, including:

Open Seams: Adhesive failure or heat-weld gaps in membrane roofs.
Punctures and Tears: Damage caused by foot traffic, storm debris, or equipment installation.
Ponding Water: Low spots that accumulate water and degrade materials.
Flashings and Penetrations: Gaps around HVAC units, vents, skylights, and pipes.
Fastener Back-out: Screws lifting up through the membrane on older systems.
Metal Corrosion: Rust eating through fasteners or panels on industrial metal roofs.

To see examples of our repair work in your area, visit our Projects gallery.

Our Commercial Roof Repair Process

Leak Detection and Inspection

We walk the roof to trace water entry points. We check seams, flashings, and drains to ensure we aren’t just patching a symptom while missing the cause.

Surface Preparation

A repair will not stick to a dirty roof. We clean the repair area thoroughly, removing dirt, moss, and loose debris to ensure a perfect bond.

Material Selection

We match materials to your existing roof. TPO gets heat-welded TPO patches; metal roofs get specialized sealants or replacements. We never use “tar in a jar” fixes that fail in a few months.

Professional Installation

Our technicians install the repair using industry-standard methods, such as heat welding for membranes or 3-course fluid-applied systems for penetrations.

Water Test and Verification

We verify the repair is sealed tight and that water flows correctly to drainage points.

Documentation

You receive a report detailing what was found, what was fixed, and photos of the completed work.

Repairs by System Type

TPO and PVC Repair

We use hot-air welding to fuse patches directly to the existing membrane, creating a monolithic bond that is as strong as the original seam.

EPDM (Rubber) Repair

We use primer and uncured flashing tapes to seal punctures and cuts, ensuring flexibility during temperature swings.

Metal Roof Repair

We treat rust, replace backed-out screws with oversized fasteners, and apply sealant to vertical seams and overlaps.

Built-Up and Modified Bitumen

We repair blisters, splits, and cracks using compatible asphaltic mastics and reinforcing fabric.

Repair vs. Replacement: Which Do You Need?

Repair is the correct choice when:

The insulation beneath the membrane is dry.
The roof is generally less than 15-20 years old.
Leaks are isolated to specific areas (seams, penetrations).
The roof deck is structurally sound.
You are looking to extend the roof life for a few more years before a capital expenditure.
The existing membrane still has flexibility and has not become brittle or shrunken

If the roof has widespread saturation, please visit Full Replacements. If the membrane is worn but dry, check Roof Coatings.

To check our service range for repairs, visit Service Areas.

Comprehensive Commercial Roofing Solutions

From emergency repairs to complete restoration, we provide the right system and services for every stage of your commercial roof’s lifecycle.

Commercial Roof Coatings

Complete Roof Replacement

Spray Foam Roofing

Membrane Systems

Metal Roofing

FAQs

How quickly can you respond to a commercial roof leak?

We prioritize active leaks to minimize damage to your inventory and operations. Contact us immediately to schedule a repair crew.

Do you warranty your commercial roof repairs?

Yes. We stand behind our workmanship and provide warranty details specific to the type of repair performed.

Can you repair a roof installed by another contractor?

Yes. We repair systems installed by other companies, provided the materials are compatible and the structure is safe to access.

Will a repair fix my roof permanently?

A repair fixes the specific leak. However, if your roof is aging, other leaks may develop elsewhere. We will advise you if the roof is nearing the end of its life.

Don’t let a small leak turn into a major problem.

Big River Roofing for professional commercial roof repair.