Commercial Roofing
Professional Commercial Roofing in San Jose, CA
We're a 16-year San Jose crew that knows commercial roofs—flat, low-slope, TPO, PVC, and modified bitumen. Licensed, bonded, and insured. Free estimates.
What’s Included
Every Commercial Roofing Job Includes These 6 Steps
When you book with us, you get a full crew, factory-certified materials, and a cleanup guarantee. No surprises, no skipped steps.
- Free, no-obligation roof inspection and written estimate
- Full tear-off or overlay (your choice, we recommend based on condition)
- Factory-certified installation for Malarkey, CertainTeed, GAF, or Owens Corning materials
- Ice and water shield on all valleys and penetrations
- New flashing, pipe boots, and ridge vents where needed
- Complete job-site cleanup with magnet sweep for nails
- Workmanship warranty and manufacturer warranty documentation
- We handle insurance claims from start to finish
How We Work
Our Commercial Roofing Process
From your first call to final sign-off, we follow a proven workflow that keeps your project on track, on budget, and built to last.
- Initial Consultation & Inspection — We start with a free, no-obligation roof inspection. Our team assesses your current roof condition, takes measurements, and identifies any underlying issues like ponding water, membrane damage, or insulation gaps.
- Material Selection & Quoting — Based on your building’s needs and budget, we present options from top manufacturers like GAF, CertainTeed, and Malarkey. You’ll get a detailed quote with no hidden fees, plus a timeline for completion.
- Scheduling & Prep — Once you approve, we schedule the work at your convenience. We secure the site, protect landscaping and entrances, and coordinate with any building management or tenants to minimize disruption.
- Roof Installation or Repair — Our crew handles everything from tear-off to installation, using factory-certified techniques. We address any unexpected issues immediately and keep you updated daily on progress.
- Final Inspection & Cleanup — We walk the completed roof with you, ensuring every detail meets our standards. Then we clean the site thoroughly, leaving it better than we found it — no nails, no debris, no excuses.
- Warranty & Follow-Up — You receive a workmanship warranty plus manufacturer warranties. We’re always a call away if you have questions, and we check in after your first heavy rain to confirm everything’s sound.
DIY vs Pro: The Real Cost
South Bay Roofing Co. vs DIY vs Cheap Competitors
We've seen too many San Jose homeowners try the DIY route or hire the lowest bidder—only to call us for a fix a year later. Here's how the three options stack up for a typical commercial flat roof.
| Factor | DIY | Cheap Competitor | South Bay Roofing Co. |
|---|---|---|---|
| Materials | Big-box store modified bitumen (often wrong type for your deck) | Bargain-grade TPO or torch-down (thin membranes, short lifespan) | Factory-certified Malarkey, CertainTeed, GAF, or Owens Corning—matched to your roof's pitch and climate |
| Labor & Safety | No training, no insurance—one slip and you're liable | Unlicensed crews, minimal safety gear, no workers' comp | Licensed, bonded, insured crew (CA CSLB #1087234) with 16 years of South Bay experience |
| Leak Repairs (Year 1) | Likely—improper flashing and seams are the #1 DIY mistake | Common—cheap labor cuts corners on detail work | Rare—we warranty every seam and penetration |
| Warranty | None—you own every mistake | Limited or voided if installed incorrectly | Full manufacturer warranty + our own workmanship guarantee |
| Cleanup | You haul debris, nails, and old material yourself | Often leaves debris behind; you'll be sweeping for weeks | We guarantee a spotless job site—every time |
| Long-Term Cost | High—materials + tools + future repairs add up fast | Moderate upfront, but early replacement cancels savings | Best value—competitive price + roof that lasts 20+ years |
Real Job, Real Results
Commercial Flat Roof Replacement in Willow Glen
We replaced a failing built-up roof on a 12,000 sq ft retail strip in Willow Glen last fall. Here’s exactly what we did, what it cost, and how it’s holding up.
Quick Answers
Common Questions About Commercial Roofing
We've been handling commercial roofs across San Jose for 16 years. Here are the answers to the questions we hear most often from business owners like you.
How much does commercial roofing cost in San Jose?
Costs vary by roof size, material, and condition. For a typical San Jose commercial property, expect $5–$12 per square foot for TPO or PVC, and $8–$15 for modified bitumen. We give free, no-obligation estimates after inspecting your roof.
What commercial roofing materials do you install?
We are factory-certified for Malarkey, CertainTeed, GAF, and Owens Corning. For flat roofs we commonly install TPO, PVC, EPDM, and modified bitumen. We'll recommend the best system for your building's age, slope, and budget.
How long does a commercial roof replacement take?
Most commercial roof replacements in San Jose take 3–10 days, depending on size and weather. We work efficiently to minimize disruption to your business and always clean up completely each day.
Do you handle insurance claims for commercial roof damage?
Yes, we handle insurance claims from start to finish. We'll document the damage, work with your adjuster, and make sure you get the coverage you're entitled to. We've done this for dozens of South Bay businesses.
Is commercial roofing different from residential roofing?
Yes. Commercial roofs are typically low-slope or flat, use different materials (TPO, PVC, modified bitumen), and require specialized installation techniques. Our crew has 16 years of experience on both commercial and residential roofs across San Jose.
What warranty do you offer on commercial roof installations?
Every commercial roof we install comes with a manufacturer warranty (typically 20–30 years) plus our own workmanship warranty. We also guarantee a thorough cleanup after every job.
Can you repair a commercial roof leak quickly?
Absolutely. We offer emergency leak repairs for San Jose businesses. Call us at (510) 327-8325, and we'll typically be on-site within 24 hours to stop the leak and prevent water damage.
Pricing Guidance
Final pricing depends on roof size, slope, access, materials, and condition of underlying decking. Ranges below are typical for a single-family home.
| Service | Typical Range | Unit |
|---|---|---|
| Roof Replacement | $9,000–$28,000 | per single-family home |
| Roof Repair | $450–$2,800 | per repair |
| Storm Damage Repair | $800–$12,000 | per claim |
| New Roof Installation | $9,500–$30,000 | per single-family home |
| Metal Roofing | $14,000–$42,000 | per single-family home |
| Shingle Roofing | $8,500–$24,000 | per single-family home |
| Flat Roofing | $6–$14 | per square foot installed |
| Gutter Installation | $850–$3,400 | per home (includes downspouts) |
| Roof Inspection | $0–$450 | per inspection (often free with replacement) |
| Emergency Roof Repair | $600–$3,500 | per emergency call |
| Skylight Installation | $950–$3,800 | per skylight installed |
Ready to Protect Your Commercial Roof?
We've been keeping South Bay businesses dry for 16 years. Get a free, no-obligation estimate for your commercial roof repair or replacement.
Licensed, bonded & insured — CA CSLB #1087234. Free inspection included.