Leak source diagnosis
Water travels. The stain in the ceiling is rarely under the hole, so we trace it before anything gets sealed.
Commercial Roof Repair, at a glance
John Beal Roofing repairs commercial roofs across St. Louis and Metro East Illinois — membrane seams, curb and pipe flashing, wall terminations, drains, pitch pockets, storm damage and roof-mounted equipment penetrations. We find the actual source of the leak instead of patching where the ceiling stain is, and repairs are documented with photos. Free inspections, 24/7 emergency response. Call (314) 429-6000.
What Is Included
The Work, Line By Line
Seam and lap repair
Failed welds and open laps cut out and re-welded properly, not smeared with mastic.
Membrane systemsCurb and penetration flashing
The number-one failure point on a commercial roof gets rebuilt, not caulked.
Drain and ponding correction
Blocked drains cleared, sumps rebuilt, and low spots addressed so water leaves the roof.
Flat roof repairStorm damage repair
Wind-lifted membrane, punctures and hail bruising documented for the claim and repaired.
Storm claimsRepair or replace, honestly
If the roof is past saving we say so. If it has ten years left we repair it and tell you that too.
What replacement costs
Why This Company
Family-Run In St. Louis Since 1947
John Beal's grandfather started this company in 1947. Three generations later it is still owned by the family, still headquartered in Maryland Heights, and still sending out the same crews it trains itself.
That matters on a commercial roof because the warranty is only worth the company standing behind it. Storm-chasing outfits sell hard for six weeks after a hail event and are unreachable by the time the seams open up.
- A real 24/7 line. A live dispatcher answers at 2 a.m., not an answering service that takes a message until Monday.
- Manufacturer certified. Owens Corning Platinum Preferred, with the certifications commercial systems require for full warranty coverage.
- Documented every visit. Dated photos, measurements and a written scope, so owners and boards have a record and adjusters have evidence.
- Lifetime workmanship warranty. On qualifying work, backed by a company that has been here since 1947.
Related: Free commercial roof inspection
Common Questions
Can you repair a roof you did not install?
Yes, on any commercial system. We will also tell you if it is still under another contractor's warranty and should be their call.
How fast can you get out for a leak?
A live dispatcher answers 24/7 and emergency dry-in gets mobilized immediately for active leaks.
Will a repair void my manufacturer warranty?
Not when it is done by a certified contractor to the manufacturer's detail. Unqualified patching can void it.
How do you find a leak you cannot see?
Water testing, infrared and moisture meters where needed, plus a systematic check of every penetration and termination.
Is a repair worth it on an old roof?
Sometimes it buys the years you need to fund a replacement properly. We give you the photos and the honest read.
Free Commercial Roof Evaluation
Tell us about the building and a dispatcher will call to schedule.