Commercial Roofing in Santa Barbara & Southern California
Professional commercial roofing solutions designed to protect your property, assets, and operations with durable systems and expert workmanship.
Commercial roofing in Santa Barbara is mostly flat and low-slope roofing: offices, shops, restaurants, warehouses, schools and apartment buildings whose roofs are covered with single-ply membrane, modified bitumen, built-up roofing, spray foam or metal. NEMA Roofing repairs, maintains and replaces commercial roofs in every county it serves, Los Angeles, Ventura, Santa Barbara, Riverside and San Bernardino, with five Google-verified locations in Santa Barbara, Oxnard, Woodland Hills, Tarzana and Downey. Call 866-631-3366 to schedule your free on-site assessment and receive a no-obligation proposal.
For a property manager or owner, the questions are usually the same: how long can this roof keep going, what will the next repair or re-roof involve, and what does California’s code require when the roof is redone. This page answers each of them.
Signs a commercial roof needs attention
- Leaks that return after each storm, or new stains on ceiling tiles.
- Water still standing on the roof two days after rain.
- Open seams, blisters, or membrane pulling away at parapets and curbs.
- Blocked drains and scuppers, or rust streaks below them.
- Loose or damaged flashing around rooftop units, vents and skylights.
- Soft spots underfoot that suggest wet insulation.
Commercial roof systems and what each one needs
| System | Common on | What to watch |
|---|---|---|
| TPO and PVC single-ply membranes | Offices, retail, warehouses | Heat-welded seams, punctures from foot traffic around rooftop units, perimeter securement |
| Modified bitumen | Small commercial and mixed-use buildings | Seam laps, surface cracking and granule loss, flashing at parapets |
| Built-up roofing (BUR) | Older commercial buildings | Blisters, bare spots where gravel has moved, flashing at edges |
| Spray polyurethane foam (SPF) | Irregular roofs with many penetrations | The protective coating, which must be renewed before the foam is exposed to the sun |
| Metal panels | Warehouses, agricultural and industrial buildings | Fasteners, laps, rust at cut edges; see metal roofing |
Whatever the system, the California Building Code (2025 edition, section 1507) requires built-up, modified bitumen, single-ply and spray foam roofs to have a design slope of at least 1/4 inch per foot for drainage, and it describes a properly drained roof as one that drains within 48 hours of rain. Ponding is a design problem, not only a maintenance one.
The cool-roof rule for commercial re-roofs
California’s Energy Code applies to commercial re-roofing in every climate zone. Under the 2025 code, in force since January 1, 2026, when more than 50 percent of a nonresidential low-slope roof, or more than 2,000 square feet, whichever is less, is replaced, re-covered or recoated, the new roofing product must have an aged solar reflectance of at least 0.63 and a thermal emittance of at least 0.75, or a solar reflectance index of at least 75. A lower reflectance is allowed only when the roof and ceiling assembly meets the code’s insulation limit instead.
In practice that means a white or light-colored cool-rated membrane or coating on most commercial re-roofs, and it is worth checking before you accept a bid that quotes a dark product. The product’s Cool Roof Rating Council label shows the values. Our cool roofing page explains the ratings.
Repair, restore or replace
- Repair when problems are local: a seam, a flashing detail, a puncture, a drain.
- Restore or re-cover when the membrane is worn across the roof but the insulation beneath is dry. A coating or a new layer over the existing roof can add years, but only over dry material, which has to be confirmed.
- Replace when insulation is wet over large areas, the roof already has several layers, or leaks keep appearing in new places.
For a building with tenants, a planned replacement in the dry months is almost always cheaper and less disruptive than emergency repairs through a wet winter.
A maintenance plan that prevents most leaks
Most commercial roof leaks start at the same few places, so a short checklist twice a year, and after major storms, catches most of them early:
- Clear drains, scuppers, gutters and downspouts.
- Walk the seams and the perimeter flashing.
- Check every curb, pipe, vent and skylight flashing.
- Look for damage from HVAC service and other rooftop foot traffic.
- Photograph and log what was found, so changes can be compared year to year.
See roof maintenance for what a scheduled visit covers, and flat roof repair for how individual leaks are traced and fixed.
How to compare commercial roofing bids
- Same scope. Tear-off or re-cover, insulation, cover board, membrane type and thickness, flashing and drain work should match line by line.
- Code items named. The cool-roof product and its rating, and the fire classification where the building is in a fire hazard severity zone.
- Warranty. Whether it is a manufacturer’s warranty, the contractor’s own, or both, and who registers it. NEMA is a GAF Master Elite contractor, an Owens Corning Preferred Contractor and a Polyglass Preferred Contractor, and each of those manufacturers issues its warranties through registered contractors.
- License. Check the contractor’s license on the Contractors State License Board website; NEMA’s is CSLB license #1083283, with the roofing (C-39) and general building (B) classifications.
Commercial roofing questions
Can a commercial roof be replaced while the building is open?
Usually, yes. The work is planned in sections so that each area is closed up at the end of the day, with access, noise and rooftop equipment coordinated with the building’s occupants.
Does a commercial re-roof need to be a cool roof?
For a low-slope roof, yes in every California climate zone once the work passes the size threshold described above, unless the insulation exception is used.
How often should a commercial roof be inspected?
Twice a year and after major storms is a sensible routine for most low-slope roofs, with the fall visit timed before the rainy season.
Do you work on commercial roofs in Ventura County?
Yes. NEMA serves Ventura, Oxnard, Camarillo, Thousand Oaks and the rest of Ventura County, as well as Santa Barbara, Los Angeles, Riverside and San Bernardino counties.
To schedule an assessment of your building, call 866-631-3366 or use the form below.
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Little Taste From Big Projects
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FIRE RATED METAL ROOFING
2 PIECE TILE - SANTA BARBARA
CLASS A FIRE-RATED TILE ROOF
TILE ROOF INSTALLATION - SANTA BARBARA
TILE ROOF INSTALLATION - MONTECITO
METAL ROOF INSTALLATION - MALIBU
ROOF INSTALLATION - SANTA BARBARA
ASPHALT SHINGLE ROOF INSTALLATION
SHINGLE ROOF REPLACEMENT
TILE ROOF REPLACEMENT
PRESIDENTIAL SHINGLE INSTALLATION
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As one of the leading roofing contractors, The NEMA Roofing team proudly provides a wide range of roofing services for residential and commercial properties. Whether you need installation, maintenance, or roof repairs, our roofing experts deliver tailored solutions to meet your specific needs.
Interested in working with a trusted roofing contractor? Simply fill out the form below to schedule your free on-site assessment and receive a no-obligation proposal.