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Innovating Creative and Practical Solutions

Unparalleled Experience

Twining has developed a strong reputation by providing sound engineering, testing, and inspection services on every project we undertake. We earned this reputation knowing that the true measure of our performance rests in the satisfaction of our clients. We approach each project with the understanding that we are evaluated on the safety and durability of the structures and pavements we test and inspect.

This approach has allowed us to develop long lasting relationships with our clients. These relationships have given us experience that is unmatched by our competitors.

Join us as we journey through our Materials Testing Laboratory located in Fountain Valley, CA. During this visual tour, you will learn about some of the tests we offer on the road to construction product certification and compliance. Whether you are looking to bring a new product to market, reformulate an existing product, or perform R&D testing to better aid in development and analysis, our expert and dedicated Team is here to provide top notch service and results you can trust.

Twining uses state-of-the art technology to monitor and test your structures, keeping them safe and up to safety standards.

  • Survey & Documentation
  • Non-Destructive Evaluation (NDE)
  • Invasive Sampling & Material Testing
  • Petrographic & Materials Investigations
  • Special Testing




18071 Mount Washington Street, Unit A,
Fountain Valley, CA 92708

  • Phone: 949.553.0370
  • Fax: 949.553.0371

San Diego

15950 Bernardo Center Drive, Suite J
San Diego, CA 92127

  • Phone: 858.974.3750
  • Fax: 562.426.6424


111 Main Street, Unit A
Riverside, CA 92501

  • Phone: 909.383.6660
  • Fax: 562.426.6424


1879 Portola Road, Suite G
Ventura, CA 93003

  • Phone: 805.644.5100
  • Fax: 562.426.6424


1572 Santa Ana Avenue
Sacramento, CA 95838

  • Phone: 916.649.9000
  • Fax: 562.426.6424

Bay Area

5027 Commercial Circle, Suite G
Concord, CA 94520

  • Phone: 925.849.8186
  • Fax: 562.426.6424


2800 Wilderness Place, Suite A
Boulder, CO 80301

  • Phone: 303.938.0166
  • Fax: 303.938.0167


5801 Benjamin Center Drive,
Suite 102
Tampa, FL 33634

  • Phone: 813.243.0370

Our Affiliations & Accreditations

Twining possess full-service construction material testing laboratories. Our laboratories are certified, accredited, and/or inspected by all major governing agencies.


Interested in joining our team of driven professionals and technical experts?
Find your next opportunity at Twining.