FAQs

Civil engineering testing frequently asked questions

Have any quick questions about our processes? Find your answers below.

Frequently Asked Questions

We provide a full range of civil engineering material testing, including asphalt, concrete, soil, aggregates, geotechnical, field services, chemical analysis, and project-based site laboratories.

Yes. Steyn-Wilson Laboratories is SANAS ISO 17025:2017 accredited, with 109 test methods under our accreditation. This ensures our testing is accurate, reliable, and recognised nationwide.

Turnaround times depend on the test and project scope, but we pride ourselves on being one of the fastest testing laboratories in the Western Cape. Many results are available within 24–48 hours.

Yes. Our field teams perform compaction control, density testing, and sampling directly on site. For large projects, we can establish a dedicated site laboratory to deliver faster results and ongoing quality control.

We support:

Public infrastructure projects (roads, bridges, schools, hospitals)
Private sector construction (commercial, residential, industrial)
Mining and heavy civil works

Our technical team will guide you. Simply share your project requirements, and we’ll recommend the relevant test methods to ensure compliance with SANS standards and project specifications.

Speed – fast, reliable turnaround times.

Service – approachable, responsive client support.

Quality – SANAS-accredited results you can trust.

Ethics – honest reporting and independent testing.

We are based in the Western Cape, serving clients across the province and beyond with both in-lab and on-site testing services.

We are an independent testing laboratory. While we do not offer engineering consulting or design services, our results provide the critical data engineers need to make design and construction decisions.

Simply visit our Contact page or call/email us directly. Our team will provide a clear, competitive quote based on your testing requirements and timelines.

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What services do you offer?

Asphalt, Bitumen, Emulsion, Concrete, Soil and Gravel, Aggregates, Geotechnical, chemical and on-site testing.

Johann is the Managing Director and a SANAS Technical Signatory at Steyn Wilson Laboratories. He holds a ND-Civil Eng. With over 20 years of experience in the civil engineering laboratory sector, with a specialized focus on asphalt and bitumen. Johann is well known for his non-negotiable commitment to quality, workplace efficiency, and ethical standards, which form the foundation of his leadership approach and has been key in driving the company’s reputation in both technical proficiency and a deep understanding of industry standards, ensuring the continued growth and credibility of SWL.

Beyond his professional commitments, he values spending quality time with his wife and three children, Johann is passionate about precision reloading of ammunition for both hunting and sport shooting. He also dedicates time to restoring antique tools and kitchenalia—combining craftsmanship with a love for history and historical preservation.