ASTM Witness Testing
Independent Oversight for Accurate, Defensible ASTM Water Penetration Testing
When test results matter, independent oversight is essential.
For more than 26 years, Sovell Investigative Testing and Consulting (SITC) has trained companies in laboratory testing under the North American Fenestration Standard (NAFS) and ASTM field testing procedures. Our deep expertise in testing standards, methodologies, and common failure points uniquely positions us to provide authoritative ASTM witness testing services.
Why Independent ASTM Witness Testing Matters
Water penetration testing is only as reliable as the procedures used to perform it.
Improper protocols, incorrect assumptions, or inadequately trained personnel frequently lead to:
- Misidentification of the true leak source
- Inaccurate or non-reproducible results
- Costly repairs based on faulty conclusions
- Disputes between contractors, consultants, and manufacturers
In many cases, water intrusion originates from multiple sources — including:
- Fenestration systems
- Exterior wall assemblies
- System interfaces and transitions
- Installation deficiencies
Without qualified oversight, these complexities are often misunderstood.
Our Expertise
SITC provides objective, third-party witness testing for ASTM water penetration testing conducted in the field environment.
We ensure:
- Testing complies with applicable ASTM standards
- Procedures are executed correctly
- Leak investigations are methodical and technically sound
- Findings are scientific, accurate, and defensible
Our role is not to influence results — it is to ensure they are correct.
Defensible Results You Can Trust
A qualified investigator must be capable of identifying the true source of water intrusion — not just a pass or fail result.
SITC’s involvement provides:
- Technical credibility
- Reduced liability exposure
- Clear, documented findings
- Confidence in final conclusions
When accuracy, compliance, and objectivity are critical, independent ASTM witness testing is not optional — it is essential.
