St. Charles County's Trusted Roofing Experts
- 5-Year Workmanship Warranty
- Locally Owned Since 1973
- Licensed & Insured in Missouri & Illinois
Why Choose Gallagher Bros for Your New Roof?
When your roof needs replacing, you need a contractor who shows up, communicates clearly, and gets the job done right. That’s been our promise to St. Louis families for over five decades.
We’re not a national franchise or a storm-chasing outfit that disappears after collecting your check. We live here. We work here. And we’ll still be here in five years when your warranty matters.
From our O’Fallon office, we serve homeowners throughout St. Charles County:
O’Fallon (63366, 63368) • Cottleville (63376) • St. Charles (63301, 63303, 63304) • Weldon Spring (63385) • Lake St. Louis (63367) • Dardenne Prairie (63368) • Wentzville (63385) • St. Peters (63376)
Complete Roofing Solutions
From minor repairs to complete roof replacements, we handle all your roofing needs with expert precision
Fast Roof Repairs
Prompt, dependable repairs for leaks, missing shingles, and weather damage. We'll restore your roof's integrity and protect your Arnold home.
Expert Roof Replacement
When repairs aren't enough, we provide complete roof replacement with quality materials and expert installation. Every replacement includes our 5-year workmanship warranty on top of manufacturer warranties. We'll help you choose the right shingles for your home and budget.
Free Roof Inspections
Not sure if you need repairs? We offer comprehensive roof inspections at no charge. We'll document any issues with photos and provide honest recommendations—whether that's a simple repair, ongoing monitoring, or full replacement.
Storm Damage Response
Hail, wind, and fallen branches can compromise your roof's integrity. We work directly with your insurance company, handling documentation and the claims process so you can focus on your family. Our team responds quickly to assess damage and prevent further water intrusion.
Complete Exterior Services
Full exterior solutions including professional gutter systems and quality siding installation to protect your entire home.
Insurance Claim Assistance
Dealing with insurance after storm damage is stressful. Our team understands exactly what documentation insurance companies require and handles the entire process. We meet with adjusters, provide detailed damage reports, and ensure you get the coverage you're entitled to. You shouldn't have to fight your insurance company while also dealing with a damaged roof.