VeriSpec, LLC
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  • Home
  • About
  • Services
  • Industries
  • Quality Philosophy
  • Third-Party Inspection
  • Contact Us

Third-Party Coating Inspection Services

Inspector performing high-voltage holiday testing on a tank lining.

Verispec provides independent, third-party inspection of protective coatings, linings, and fireproofing for owners, engineers, and contractors. We’re headquartered in St. Louis, MO with offices in Pensacola, FL and Beaumont, TX but inspect projects across the U.S. Every inspector on our jobs is AMPP-certified, and AMPP Senior Certified Coating Inspectors review the work. You can choose hold-point inspections at stages or a full-time inspector on site for every shift. Call 314-651-9933 or request an inspection.

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What a third-party coating inspector does

A third-party coating inspector is an independent, certified inspector who checks that surface preparation, application, and the finished coating meet the project specification, and who documents the results. 

On a project, an inspector may check any one or all of the following:

  • Environmental conditions: air and surface temperature, relative humidity, and dew point
  • Surface cleanliness and surface profile
  • Soluble salts
  • Materials, batch records, and mixing
  • Wet and dry film thickness (DFT)
  • Holiday (pinhole) testing
  • Adhesion testing
  • Cure
  • Repairs and final acceptance

As applicable, you will get an inspection and test plan (ITP) before work starts, daily reports while it’s underway, nonconformance records when something falls short, and a turnover package at closeout. See our coating, lining and fireproofing inspection services.

Third-party QA vs. Contractor QC

Quality control (QC) means the contractor checks its own work. Quality assurance (QA) is the owner’s independent verification that the contractor’s QC worked and that the specification was met.

The most critical jobs have both, so that there are layers of quality embedded to make sure a step is not missed or performed incorrectly.  And if a lining fails early, the owner needs records made by someone there with their interests in mind.

Verispec often works as the owner’s representative. We also support engineers and contractors who need independent verification for a client, a warranty, or their own peace of mind. Read more about why third-party inspection matters.



Hold-point inspection or full-time on-site inspection

Hold-point inspections

Hold-point inspections

Hold-point inspections

The inspector attends set stages, typically before surface preparation, after surface preparation, between coats, and at final. Work moves past each hold point only after it passes. This suits smaller scopes, shop work, and experienced contractors with tight QC programs, who have a customer requiring that additional sign-off.

Scaling for large jobs

Hold-point inspections

Hold-point inspections

Verispec contracts only AMPP-certified inspectors, drawn from a network we know, so we can staff projects that need more than one inspector. On one power plant job, we managed a four-inspector team across two contractors coating 18 storage tanks.

Full-time on-site inspection

An inspector is on site for every shift and sees each step as it happens. This suits linings in immersion or chemical service, critical assets, compressed schedules, and specifications or warranties that require continuous inspection.




What we inspect

Our work covers more than paint:

  • Protective coatings on steel and concrete: epoxies, novolacs, polyurethanes, zinc primers, and polyureas
  • Linings: tank and vessel linings, vinyl ester and flake glass systems, and secondary containment
  • Fireproofing: SFRM, intumescent, and cementitious systems
  • FRP: vessels, roofs, and fiberglass-reinforced lining systems
  • Rubber linings and asphalt sheet linings for aggressive chemical service
  • Acid brick and tile: chemically resistant masonry linings and floors
  • Shop and field work: blasting and painting in the shop as well as in the field



Projects We've Inspected

Here’s a sample of the project types our team has inspected, specified, or supported:

  • Root-cause investigation and full-time QA for re-lining concrete ultrapure water storage tanks at a semiconductor fab, including the ITP for re-application
  • Owner’s-representative QA on new wastewater treatment builds at power stations, with epoxy and vinyl ester systems over steel and concrete
  • Blast-and-coat of the interior and exterior of 18 storage tanks at a power plant, with a four-inspector team across two contractors, plus ITPs and turnover packages
  • Vinyl ester linings in FGD systems and sprayable novolac vinyl ester in baghouses at coal-fired power plants, from specification through QA
  • Sulfuric acid service: vinyl ester tank linings, lining details for appurtenances, and concrete secondary containment
  • Spent acid tank: QA oversight of asphalt sheet lining, rubber lining, and acid-resistant brick, plus QA of the FRP roof reassembly and coating
  • A 240-foot-diameter floating-roof tank: condition assessment, specification, bid review, and QA of a flake glass vinyl ester and fiberglass-reinforced lining
  • Nuclear projects: nuclear-quality submittals and QA of concrete tank preparation ahead of rubber lining
  • Biocontainment laboratory coatings and resinous flooring over concrete
  • Failure analysis of pipeline joint coatings and tank lining failures

Frequently Asked Questions

Please reach us at gene.doerr@verispecllc.com if you cannot find an answer to your question.

A third-party coating inspector is an independent, certified inspector who checks that surface preparation, coating application, and the finished system meet the project specification. The inspector monitors such things as environmental conditions, measures surface profile, soluble salts, and dry film thickness (DFT), runs holiday and adhesion tests, and records everything in daily reports. 


Contractor QC is the applicator checking its own work. Third-party QA gives the owner an independent check and an independent record of what was done, when, and under what conditions. That record matters most when a coating fails early or a warranty claim is disputed. It also helps catch problems while they’re still cheap to fix.


With hold-point inspection, the inspector attends set stages: before blasting, after surface prep, between coats, and at final. With full-time inspection, an inspector is on site every shift. Verispec offers both. Full-time is typical for linings, critical assets, and tight schedules. Hold-point often suits smaller scopes and shop work.


Look for AMPP (formerly NACE/SSPC) coating inspector certification. Senior Certified Coating Inspector is the highest level of AMPP’s coating inspector program. AMPP Senior Certified Coating Inspectors lead Verispec’s work, and every inspector on our jobs is AMPP-certified. Ask any firm which certification level its on-site inspector actually holds.


Typically you get an inspection and test plan (ITP) before work starts, daily reports with readings and photos, nonconformance records, and a final turnover package all in a digital format. Verispec writes reports so they can support warranty claims, disputes, and failure investigations, not just the final sign-off.


Need a coating inspector?

We would love to work with you!

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