Flat roofs on commercial buildings deal with challenges residential roofs don't: rooftop HVAC units, exhaust fans, plumbing penetrations, satellite equipment, foot traffic, and ponding water. Thornton Roofing & Maintenance has the training and equipment to handle all of it across Thornton.
Our Commercial Roofing Process
Free Assessment
We inspect the entire commercial roof: membrane condition, seam integrity, flashing details, penetration seals, drain function, and insulation condition. Core samples reveal moisture levels in the existing system. You receive a detailed written report.
Project Proposal
Your proposal includes material specifications, installation method, warranty terms, project timeline, and total cost. We itemize everything and explain why we're recommending the specific system for your building.
Expert Crew
Factory-trained crews using proper equipment, hot-air welders for TPO/PVC, torch equipment for modified bitumen, and adhesive systems for EPDM. Every seam, flashing, and penetration detail inspected before we leave.
Final Inspection
Manufacturer warranty registered upon completion, 15-20 year coverage depending on system and build-up. We offer maintenance contracts to keep your warranty valid and your roof performing for its full life span.
What Thornton Customers Say
"Responded fast and got the job done right the first time. Crew was polite, professional, and cleaned up everything. Would absolutely hire again."
"Our neighbors recommended them and now we understand why. Meticulous attention to detail and they treated our home like it was their own."
"From the first phone call to the final walkthrough, everything was seamless. The team was courteous and efficient. Already recommended them to two friends."
Why Choose Thornton Roofing & Maintenance for Commercial Roofing?
Manufacturer Certified
Certified installer for major commercial membrane manufacturers including Carlisle, Firestone, GAF, and Johns Manville. Factory training and warranty authorization.
Honest Assessments
If a repair or coating extends your roof's life 10+ years, we recommend that over a full replacement. We save you money when the roof allows it.
Minimal Business Disruption
We schedule around your operations. Phased installation, noise management, and debris containment. Your tenants and customers barely know we're there.
17+ Years Commercial Experience
We've been installing commercial roofs in Thornton for 17 years. Retail, warehouse, office, restaurant, multi-family. We handle it all.
About Our Thornton Commercial Roofing Services
TPO is our most-installed commercial membrane in Thornton. White reflective surface for energy efficiency, hot-air welded seams that are stronger than the membrane itself, and 15-20 year manufacturer warranties. We install 60-mil and 80-mil systems, fully adhered or mechanically attached, over polyiso insulation.
We offer annual and semi-annual maintenance contracts for Thornton building owners. Regular inspection catches small problems before they become expensive emergencies. Seam checks, flashing inspection, drain clearing, and minor repairs, all documented with photos in a maintenance report.