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Trusted Waterproofing Services in Sonoma, CA
North Coast Waterproofing has been serving Northern California since our founding, specializing in comprehensive waterproofing solutions for residential, commercial, and industrial clients. Our team brings decades of combined experience in addressing complex waterproofing challenges, utilizing advanced materials and techniques tailored to each project's unique requirements. Located in Sonoma, we service areas from South San Francisco to Mendocino, prioritizing exceptional craftsmanship and personalized service. Our expertise spans below-grade wall systems, deck coatings, vapor barriers, and specialized sealants, ensuring long-lasting protection against water intrusion. We maintain strict adherence to industry standards while fostering transparent communication with clients, vendors, and construction partners.Our commitment to integrity and professionalism has earned us recognition from satisfied clients across diverse sectors, including wineries and residential developments. With a focus on continuous improvement, we invest in training our team to stay current with evolving technologies and best practices in waterproofing. Our approach emphasizes proactive problem-solving, whether addressing existing water damage or implementing preventive measures. We value lasting relationships built on trust, delivering fair pricing without compromising quality. Our operational history reflects consistent growth driven by client referrals and repeat business, underscoring our reputation for reliability in Northern California's construction community.
Services
Below Grade Waterproofing
Sealants & Caulking
Deck Coatings
Vapor Barriers
Crack Injection
Concrete Sealers
Anti-Graffiti Coatings
Gas Membrane Barriers
Membrane Flashing
Cementitious Waterproofing
Highlights and features
- We have over 20 years of experience in Northern California waterproofing projects
- Our team uses advanced materials like bentonite clay and polyurethane systems
- We provide customized solutions for residential, commercial, and industrial properties
- Our process includes thorough site assessment and long-term maintenance planning
- We maintain CA Contractor License #902792 for professional accountability
What people say
Exceptional quality workmanship
Professional and courteous crew
Effective long-term solutions
Transparent communication
Prompt follow-up service
Services
Below Grade Waterproofing
Our below-grade waterproofing systems protect foundations using trowel-applied membranes, spray coatings, and bentonite clay. We install drainage composites and protection layers to prevent water intrusion in residential and commercial structures. This service addresses slab-on-grade applications and subterranean walls, ensuring long-term structural integrity against groundwater pressure.
Deck Coatings
We apply traffic-rated deck coatings using polyurethane, acrylic, and epoxy formulations. Our systems protect pedestrian and vehicular decks from water damage while providing slip-resistant surfaces. The coatings resist UV degradation and chemical exposure, maintaining durability in Northern California's climate conditions for both new construction and restoration projects.
Vapor Transmission Barriers
Our vapor barriers prevent moisture migration through concrete slabs and walls using fluid-applied membranes and sheet systems. We address crawl space applications and elevated slabs, controlling humidity levels to prevent mold growth and structural damage. The systems comply with building codes for both permeable and non-permeable applications in residential and commercial settings.
Crack Injection
We specialize in epoxy and urethane crack injection for concrete structures. This method permanently seals active and dormant cracks in foundations, walls, and elevated slabs. Our two-component injection systems expand to fill voids completely, restoring structural integrity while preventing water infiltration in both residential and industrial environments.
Sealants & Caulking
We install high-performance sealants for building joints, windows, and doors using polyurethane and silicone formulations. Our systems accommodate thermal expansion while maintaining watertight seals in tilt-up construction and masonry applications. We follow ASTM standards for joint preparation and application, ensuring long-lasting protection against weather intrusion in commercial and residential properties.
People
Cliff Matthews
President
Cliff Matthews, President of North Coast Waterproofing, brings 20 years of industry experience to every project. As a licensed journeyman carpenter, he oversees operations with technical expertise in waterproofing systems and construction management. His leadership ensures quality execution across residential, commercial, and industrial sectors.
Dan Kulack
Estimator
Dan Kulack serves as estimator for North Coast Waterproofing, applying his technical knowledge to assess project requirements and develop accurate proposals. With extensive field experience, he provides clients clear guidance on waterproofing solutions and system selection for Northern California's diverse construction environments.
Questions
What areas do you service?
We serve Northern California from South San Francisco to Mendocino, including Sonoma, Napa Valley, and Chalk Hill Road areas.
What waterproofing systems do you offer?
We provide below-grade membranes, deck coatings, vapor barriers, crack injection, and specialty sealants using materials from polyurethane to bentonite clay.
Are you licensed for California projects?
Yes, we maintain active CA Contractor License #902792 for waterproofing and related construction services across the state.
Do you handle both residential and commercial work?
We serve both markets, with extensive experience in residential waterproofing and large-scale commercial projects like wineries.
What emergency services are available?
We offer emergency waterproofing assessments and temporary protection solutions for urgent water intrusion situations.
How do you ensure quality workmanship?
Our team undergoes continuous training on new materials and techniques, with supervisors maintaining quality control throughout each project.
