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. Castella Roofing & Maintenance has the training and equipment to handle all of it across Castella.
Ponding water is the number one cause of commercial roof failure. Water that doesn't drain within 48 hours degrades the membrane and insulation underneath. Castella Roofing & Maintenance installs tapered insulation systems that create positive drainage to scuppers, drains, or roof edges, minimum quarter-inch per foot slope.
Our Commercial Roofing Process
Building Inspection
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.
Project Proposal
We present options when they exist: repair vs. replace, TPO vs. PVC, 15-year vs. 20-year warranty. Each option is priced so you can make an informed decision based on your budget and building plans.
Expert Crew
Installation phased to minimize disruption to your tenants and business operations. Debris containment, noise management, and clean work areas maintained throughout the project. Project manager on-site for every commercial installation.
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 Castella 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."
"From the first phone call to the final walkthrough, everything was seamless. The team was courteous and efficient. Already recommended them to two friends."
"Best experience we've ever had with a home service company. On time, on budget, and the results exceeded what we expected. Truly top-notch."
Why Choose Castella Roofing & Maintenance for Commercial Roofing?
Licensed & Insured
Fully licensed commercial contractor in CA. $2M general liability, workers' comp on every crew member. Your property and your business are protected.
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.
Maintenance Programs
Annual and semi-annual inspection contracts catch problems early and keep your warranty valid. Preventive maintenance costs a fraction of emergency repairs.
Minimal Business Disruption
We schedule around your operations. Phased installation, noise management, and debris containment. Your tenants and customers barely know we're there.