Commercial Roof Repair
Commercial leak fixes, membrane patches, and flashing repairs — diagnosed at the root cause, documented with photos, and completed by in-house crews.
What We Offer
Commercial Repair Services
Leak Detection & Repair
We trace water entry to its actual source — not just where the stain appears — and seal it permanently.
Flat & Low-Slope Repairs
Specialized fixes for TPO, PVC, EPDM, modified bitumen, and built-up roofing systems.
Flashing & Penetration
HVAC penetrations, vents, and parapet flashing are common failure points. We repair and reinforce them.
Ponding Water Solutions
Drainage corrections, tapered insulation, and drain repair to eliminate standing water.
Membrane & Surface Repairs
Punctures, tears, blisters, and seam failures fixed using manufacturer-approved methods.
Emergency Response
After-hours and weekend dispatch for active leaks and storm damage. Property protected fast.
Why It Matters
What you get with California First Roofing
- Stops leaks before they damage interiors
- Extends commercial roof lifespan
- Prevents ponding and structural damage
- Minimal operational disruption
- Insurance-ready documentation
Backed by
- Years
- 23
- Projects
- 1,000+
- Google rating
- 5.0 ★
- Reviews
- 247+
The Process
Our commercial repair process
Every project follows the same supervised, transparent process — from first call to final walkthrough.
Roof Inspection
Comprehensive on-site assessment of damage, drainage, and underlying causes.
Repair Plan & Estimate
Written scope and transparent pricing. You approve before we begin work.
Leak & Damage Repair
In-house crew executes repairs using manufacturer-approved methods and materials.
Flashing Reinforcement
Inspect and reinforce all flashing, penetrations, and seams in the repair area.
Final Inspection
Quality check and water test where applicable. Verify the repair holds.
Preventative Maintenance
Optional ongoing maintenance plan to catch the next issue before it becomes a repair.
“Every commercial repairI sign off on is one I'd be proud to do on my own house.”
Where We Work
Serving all three California metros
Three California offices serving every major metro. Pick your city for area-specific details.
San Diego
9606 Tierra Grande St, San Diego, CA 92126
Mira Mesa · Carmel Valley · La Jolla · Chula Vista · El Cajon · Poway · Rancho Bernardo
Los Angeles
5850 W 3rd St, Ste E, Los Angeles, CA 90036
Hollywood · Santa Monica · Beverly Hills · Pasadena · Burbank · Culver City · Long Beach
San Jose
690 Saratoga Ave, Ste 100, San Jose, CA 95129
Santa Clara · Sunnyvale · Cupertino · Campbell · Mountain View · Los Gatos · Palo Alto
Related Services
Not sure commercial repair is what you need?
Commercial Installation
Flat and low-slope systems engineered for warehouses, offices, retail, and multi-unit properties — installed code-compliant and on schedule.
Commercial Replacement
When repairs aren't enough, we remove the old membrane and install a new system suited for your building and budget — with upgraded insulation and energy-efficient options.
Roof Coating
Extend your roof's life by 10-20 years and cut cooling costs without a full replacement.
Commercial Repair FAQ
Commercial Repair questions
Get Started
Request Your Free
Roof Inspection
A licensed inspector examines your roof and delivers a written report with photos. Most estimates back within 24 hours of the visit — no pressure, no obligation.
- Free inspection — no cost, no obligation
- Written estimate before any work begins
- In-house crews only — no subcontractors
- Licensed & insured (CSLB Lic# 1094851)
- Owens Corning Preferred Contractor
- Manufacturer + workmanship warranties