Commercial roof selection is an asset-management decision: lifecycle cost, occupancy disruption during replacement, FM Global compliance, Title 24 cool-roof requirements, and energy performance all matter as much as the install price.
We work across Sonoma County's commercial inventory — wine country hospitality and tasting rooms, retail strip centers along Cleveland and Stony Point, light industrial off Airport Boulevard, medical office, agricultural operations, and the older flat-roofed downtown stock in Healdsburg, Santa Rosa, and Petaluma. Each system has a right answer.
Overview
We install and re-roof four primary commercial systems: TPO (single-ply thermoplastic), EPDM (synthetic rubber), modified bitumen (multi-ply bitumen membrane), and standing-seam metal for sloped commercial. We also offer fluid-applied roof coating restoration — silicone or acrylic — for membrane roofs that have life left but need extension.
Property managers and business owners get a single point of contact, scheduled work windows that respect operating hours, dust control over occupied space, and annual maintenance programs to extend system life and document compliance.
Materials & Systems
TPO (thermoplastic polyolefin)
The dominant new-construction commercial spec for the past decade. Mechanically fastened or fully adhered single-ply membrane in 60- or 80-mil thickness. White TPO carries high SRI (typically 0.78+), satisfies Title 24 cool-roof requirements, and qualifies for ENERGY STAR. Realistic Sonoma County service life: 20–25 years on a quality install. Manufacturer NDL warranties to 20+ years.
EPDM (rubber membrane)
60-year track record, the most proven single-ply system in commercial. Black EPDM is the default but no longer Title 24 compliant in many California climate zones; white EPDM is available at a cost premium. Realistic field life: 25–30 years. Strong choice for re-roofing existing flat commercial where energy performance isn't a primary driver.
Modified bitumen
Multi-ply asphalt-modified membrane — torch-applied or self-adhered. Heavier, more redundant than single-ply. Right answer for high-traffic roofs (HVAC service routes, frequent maintenance access) and for owners who prioritize redundancy over single-ply seam quality.
Standing-seam metal (sloped commercial)
On any commercial roof with 3:12 pitch or steeper, standing-seam metal delivers the lowest 50-year lifecycle cost. 24-gauge steel with concealed clip fasteners. Strong fit for ag operations, owner-occupied facilities, fire-zone commercial, and architecturally visible buildings.
Restoration coatings (silicone / acrylic)
For aging single-ply or modified bitumen with 5+ years of life remaining: a fluid-applied silicone or acrylic coating extends service life 10–15 years at roughly 30–40% of full replacement cost. Often qualifies for the same Title 24 cool-roof credit as a new white membrane.
Common Sonoma County Commercial Property Types
- Wine country hospitality — tasting rooms, hotels, event venues with phased work around tasting hours and harvest season
- Retail strip centers — Santa Rosa, Petaluma, Rohnert Park; staged work over occupied storefronts
- Light industrial and warehouse — Airport Boulevard, Todd Road, eastern Petaluma
- Medical office and dental — Sotoyome, downtown Santa Rosa, Petaluma River corridor
- Agricultural — barns, equipment storage, packing facilities throughout the county
- Government and public — city facilities, school district buildings, fire stations
Our Process
- Site visit and roof condition assessment — typically free for buildings under 50,000 sqft.
- Written proposal with line-item scope, schedule, and warranty options — usually within 5–7 business days.
- Permit and inspection coordination through the appropriate jurisdiction.
- Pre-construction meeting with property management or owner — staging, access, occupant communication.
- Tear-off (where applicable) staged in zones to limit exposure.
- Membrane install with continuous QC photo documentation for the manufacturer warranty.
- Mid-job and final inspections; manufacturer NDL warranty submission.
- Optional annual or semi-annual maintenance program enrollment.
Pricing
TPO and EPDM commercial replacements in Sonoma County typically run $7–$13 per square foot installed, depending on system thickness, deck condition, penetrations, and warranty length. Standing-seam metal runs $12–$22 per sqft. Restoration coatings: $3–$5 per sqft for an existing serviceable membrane.
Why North Coast Roofing for Commercial
Local owner-operated, with the bandwidth and certifications to handle real commercial scope. License #1101394, fully insured with the higher liability limits commercial owners and property managers expect. Manufacturer-certified for major single-ply systems. References available across Sonoma County commercial property — wine country hospitality, retail, medical, ag — on request.
Project Gallery
Recent commercial roofing work across Sonoma County.
Why North Coast Roofing
Customer Story
"Verified commercial testimonial pending — featured here once collected from a recent property management client."
Note: Placeholder pending real customer testimonial.
Frequently Asked Questions
Can you re-roof while we stay in operation?
Yes, on most commercial projects. We stage work over occupied space carefully, handle interior dust control, and schedule the noisiest phases (tear-off, mechanical fastening) for off-hours when feasible. We've completed re-roofs over occupied retail, restaurants, medical offices, and tasting rooms.
What's the warranty on commercial roofing?
Manufacturer NDL (no-dollar-limit) warranties run 15–30 years for single-ply, 30+ for metal, when installed by a certified contractor. Workmanship warranty is separate, typically 2–10 years depending on system and project size.
Do you offer maintenance programs?
Yes — annual or semi-annual scheduled inspection programs with priority response, written condition reports, and bundled minor repair work. Most commercial owners save money over time versus on-call repair pricing.
Do you work with property managers and REITs?
Regularly. Multi-property portfolios, regional and national property managers, single point of contact for scheduling and reporting. References available.
How long does a commercial re-roof take?
A 10,000 sqft single-ply re-roof typically runs 1–2 weeks of on-site work, weather permitting. Larger jobs and metal systems take longer; coatings can be completed in days.
What's the difference between full replacement and a coating?
Replacement removes and replaces the entire membrane — best when the existing system is failing or near end of life. Coatings preserve a serviceable existing membrane and add 10–15 years of life at a fraction of the cost. We assess which makes more sense at the inspection.
Commercial Roofing — Areas We Serve
We provide commercial roofing across all of Sonoma County:
Related Reading
Get a Free Commercial Roofing Estimate
Talk directly to Eddy. Call (707) 232-8622 or request a written estimate online.
