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. Sumas Roofing & Maintenance has the training and equipment to handle all of it across Sumas.
Our Commercial Roofing Process
Commercial Roof Assessment
Before we recommend anything, we inspect everything. Membrane, seams, flashings, drains, penetrations, parapet walls, and rooftop equipment curbs. Core samples test for trapped moisture in the insulation. Honest assessment. No scare tactics.
Scope & Estimate
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.
Commercial Installation
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 Sumas Customers Say
"We called expecting to wait days, but they were here the same afternoon. Fair pricing, quality work, and they kept us informed every step of the way."
"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 Sumas Roofing & Maintenance for Commercial Roofing?
Maintenance Programs
Annual and semi-annual inspection contracts catch problems early and keep your warranty valid. Preventive maintenance costs a fraction of emergency repairs.
Licensed & Insured
Fully licensed commercial contractor in WA. $2M general liability, workers' comp on every crew member. Your property and your business are protected.
23+ Years Commercial Experience
We've been installing commercial roofs in Sumas for 23 years. Retail, warehouse, office, restaurant, multi-family. We handle it all.
All Commercial Systems
TPO, EPDM, PVC, modified bitumen, built-up, metal. We install and repair every commercial roofing system. Material selection matched to your building's specific needs.
About Our Sumas Commercial Roofing Services
Commercial roof coatings can extend the life of an existing roof by 10-15 years for a fraction of replacement cost. Silicone and acrylic coatings over existing TPO, EPDM, or metal substrates. Not every roof qualifies. We core sample and moisture scan before recommending a coating.
Multi-family properties need roofing contractors who understand occupied buildings. Leak repairs are emergencies when water is in someone's apartment. Sumas Roofing & Maintenance prioritizes multi-family emergency calls and schedules planned work during reasonable hours.