Your Building, Our Expertise

Excellence in Roofing
& Waterproofing

Evaluation Surveys & Reports

Get help prioritizing your project’s needs. You’ll receive clear recommendations and budgets to make your decision-making process easier, and ensuring a watertight solution tailored to your unique project.

Quality Assurance Inspection

Ensure your project adheres to your specifications with our vigilant inspection experts. You’ll receive regular progress reports and a comprehensive record for your peace of mind and quality assurance.

Customized Specifications

Harness the latest technology and materials for your project’s unique requirements. We’ll help optimize cost-effective solutions with tailored specifications, providing you with accurate and detailed guidance.

Expert Witness

Leverage our vast knowledge and experience for your roofing and waterproofing litigation needs, ensuring your case’s success—whether you are a plaintiff or defendant. Our insights pave the way to legal triumph.

Maintenance Program

Extend the life of your roofing system with our Preventative Roof Maintenance Program. We’ll keep your roof at peak performance, cleaning reflective coatings for maximum benefits. Our skilled technicians detect potential issues promptly, safeguarding your roof from costly premature failures. Ensure longevity, minimize expenses.

Your Trusted Roofing Solution Consultants

For over 40 years, Van Dijk & Associates, Inc. has been your trusted source for roofing and waterproofing expertise. Our consultants provide industry knowledge and cutting-edge technology to work tirelessly for long-lasting, cost-effective solutions tailored to your needs. With global affiliations, we ensure you receive the latest advancements in roofing and waterproofing.

Let us guide you towards energy-efficient construction, reducing costs and fostering eco-friendly buildings. Say goodbye to shortcuts and hello to a high-quality approach.

Innovative Solutions


Seasoned Expertise

Global Partners

Our Satisfied Clients


“Over the 27 years that I have known and utilized VDA’s services they have proven to be trustworthy, loyal, honest, friendly and professional. VDA has great knowledge of all roofing and waterproofing materials, applications, repair recommendations and it also has access to manufactures literature. VDA also has superior knowledge of building codes and manufacturers recommendations for all roofing and waterproofing aspects of construction.”


“Van Dijk & Associates has provided waterproofing, building envelope and roofing consulting services on many Projects for Holland Partner Group, with the most recent being the Apex Phase II project, a mixed-use high-rise project located in downtown Los Angeles, CA. I highly recommend Nils and his team at Van Dijk & Associates for any project and look forward to working with them on more projects in the future.”


“Van Dijk & Associates has provided waterproofing and building envelope consulting services to Red Oak Investments and its principals at multiple development sites, including at our current project Baker Block, a 240-unit residential development under construction in Costa Mesa, CA. We find the firm to be reliable, qualified, and easy to work with in their inspections and reviews of waterproofing-related work.”