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Building Relationships with our Community

SBI Materials is a fixture of Sonoma County and we are committed to serving our communities building material needs for any project from a backyard DIY project to a full community starting at the underground development to a 200+ home development. We have a diverse range of products from custom organic soil mixes we supply to our amazing vineyards and growers in Sonoma and Napa County to , aggregates, flagstone, natural stone pavers, belgard pavers, brick from various manufacturers nationwide, natural stone veneers, manufactured veneers, porcelain paving and of course we have full capabilities for fabrication for any size project.  Let us help you find what you have been looking for.

Meet Our Team

Get to know our staff and feel free to reach out to your favorite.

Jeff Knepper
Jeff KnepperVP SBI Materials
Passionate about Natural Stone and how to help you develop it into your project. Lifetime of knowledge in the Stone industry bringing new innovations to markets and changing trends and applications to enhance the integrity of Natural stone in building uses.
Joe McGee
Joe McGeeField Superintendent
I enjoy fishing, camping, motorcycles and the ocean.
Art Gates
Art GatesWindsor Showroom GM
Art is here to assist you with all your material needs.
Mick Wells
Mick WellsTerritory Sales Manager
I’ve been in the stone industry for 14 years and counting. I pride myself with helping my clients in selecting the right stone for any application. Extremely knowledgeable with stone from around the globe. My main focus area is Northern California typically Napa, Marin, Sonoma County, South Bay and Carmel/Monterey but I handle projects worldwide. When Im not working I spend every spare moment with with wife and kids. Family + Work balance.
Howard Lasker
Howard LaskerOutside Sales Representative
Local and family oriented. Howard has more than 12 years of industry experience and knowledge. He prides himself on customer service and professionalism. Howard is your direct source for all your building and landscape materials.
Alan Williams
Alan WilliamsOutside Sales Representative
Commercial central for Alan! He has a strong understanding of what your needs are from Brick and Block to Natural Stone finishes. Alan can get you to where you are needing to be.
Ron Rowe
Ron RoweOutside Sales Representative
Passionate about stone and attention oriented for my client needs. From Slabs to Custom Cut stone for cladding or coping I’m your guy. Monterrey area + surrounding area.
Karin Neely
Karin NeelyArchitectural Education | Finish Material Sales
Covering Southern California and beyond for SBI.
Karin has been an architectural rep for 20 + years and will take care of all your Natural Stone needs. She works closely with the International Masonry institute and the Masonry Institute of Washington , Let her help you find what you’re looking for.

Design Gallery

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Trusted Trade Partners

Take a look at our exclusive partners for a full selection of what SBI Materials has to offer.