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Business Details
34 Years
experience
Your Trusted San Mateo Roofing Partner
Cal-Pac Roofing has served residential and commercial clients in San Mateo County for over 30 years, establishing itself as a trusted local roofing contractor. Founded in 1992, our company specializes in premium roofing solutions, including asphalt shingles, stone-coated steel, and membrane systems, with installations adhering to state and local building codes. We maintain certifications from leading manufacturers like GAF, Decra, and Duro-Last, ensuring industry-best practices. Our team of experienced professionals delivers meticulous craftsmanship, backed by a five-year unlimited warranty on workmanship.

As a BBB Accredited Business with an A+ rating, we prioritize customer satisfaction through transparent communication, timely project completion, and comprehensive after-sales support. Our showroom allows clients to explore material options firsthand, ensuring informed decisions. With over 3,000 roofs installed, we combine technical expertise with personalized service to address each client's unique needs.
Services
Residential Roofing Commercial Roofing Roof Repair Gutter Installation Roof Maintenance
Details
  • Year established: 1992
Highlights and features
  • 30+ years of local roofing expertise in San Mateo County
  • GAF Master Elite Certified with manufacturer-backed warranties
  • BBB A+ rated with zero complaints in 30 years
  • Factory-certified installers for top-tier product performance
  • Five-year unlimited workmanship warranty
Associations and certifications
  • Better Business Bureau
  • GAF Master Elite Certified Installer
  • Factory Authorized Installer by Decra Manufacturing
  • Factory Authorized Installer by Duro-Last, Inc.
What people say
Excellent work Professional crew Highly recommend Quality materials Prompt service
Services
Residential Roofing
We install premium residential roofing systems using GAF asphalt shingles, Decra stone-coated steel, and Duro-Last membrane materials. Our certified technicians ensure proper ventilation and waterproofing, extending roof lifespan while enhancing curb appeal. Clients benefit from energy-efficient options that reduce cooling costs and 50-year warranties on select materials.
Commercial Roofing
Our commercial roofing solutions include flat membrane systems and metal roofing tailored for office buildings and industrial facilities. We specialize in Duro-Last PVC membranes with energy-saving Cool Zone technology, ensuring leak-proof protection and compliance with commercial building codes. Emergency repair services minimize business disruption.
Roof Repair
We address leaks, storm damage, and wear with precision repairs using manufacturer-matched materials. Our team performs comprehensive inspections to identify underlying issues, including dry rot and structural damage. Preventative maintenance plans extend roof longevity while avoiding costly replacements.
Gutter Installation
Custom gutter systems protect properties from water damage with seamless aluminum and steel options. We install leaf guards and downspouts that complement roofing materials while ensuring proper drainage. All installations include slope verification and leak testing for optimal performance.
Roof Replacement
Complete tear-off and replacement services use premium materials with enhanced warranties. Our process includes decking inspection, ice dam prevention, and solar-ready installations. We handle permits and coordinate with utility companies for solar panel reinstallation, ensuring hassle-free transitions.
People
John Rossi
Owner
With over 30 years in the roofing industry, John leads Cal-Pac Roofing with a focus on quality and customer satisfaction. He personally oversees major projects and maintains manufacturer certifications.
Tony Fredericks
Project Manager
Tony manages residential projects with 25+ years of experience. He specializes in material selection consultations and ensures installations meet strict quality standards.
Brian
Installation Manager
Brian supervises crews with 20 years of field experience. He coordinates timelines and maintains safety protocols during complex roofing projects.
Earl
Estimator
Earl provides detailed assessments and cost estimates, ensuring transparency. He has served the Peninsula area for 18 years with personalized service.
Eduardo
Crew Lead
Eduardo leads installation teams with expertise in metal and shingle roofing. His attention to detail ensures flawless finishes on every project.
Questions
What types of roofing materials do you offer?
We provide GAF asphalt shingles, Decra stone-coated steel, Duro-Last PVC membranes, and custom gutter systems.
Are you licensed and insured?
Yes, we hold CA Lic. #735061 with $1M liability insurance and workers' compensation coverage.
Do you offer warranties?
All installations include a 5-year unlimited workmanship warranty plus manufacturer material warranties up to 50 years.
How long does a roof replacement take?
Most residential projects complete in 3-5 days, depending on roof size and complexity.
Can you handle insurance claims?
We assist with insurance documentation and work directly with adjusters to ensure proper compensation.
Are you BBB accredited?
Yes, we maintain an A+ BBB rating with zero complaints in our 30-year history.