Questions people askbefore they hire an agency.

Special inspection is on-site verification by a qualified third party that specific parts of a building are being constructed the way the approved drawings and the building code require. An inspector observes the work as it happens — concrete being placed, welds being made, anchors being installed — and records what they saw and what it was checked against. Those records become part of the project file the building official reviews.

Some construction cannot be verified once it is finished. You cannot see reinforcing steel after the concrete is poured, or a weld after the assembly is closed in. The building code therefore requires certain work to be observed while it is being done, by someone independent of the contractor performing it. In California this sits within the California Building Code, which adopts and amends IBC Chapter 17.

A building department inspector works for the jurisdiction and inspects at defined milestones, typically a limited number of visits across a project. A special inspector is engaged on the project itself and attends for specific scopes, either continuously while the work is performed or periodically, which can mean being present for the whole of a single pour. The two are complementary rather than alternatives: the building official relies on the special inspection record as part of what they review.

Special inspection happens on site and verifies the work — that what is being built matches the drawings and the referenced method. Materials testing happens in a laboratory and verifies the materials themselves, using samples taken from that same work. Most projects need both, and the two sets of records are meant to reconcile with each other.

Under the building code the owner, or the owner’s agent, engages the special inspection agency — not the contractor whose work is being inspected. That separation is the whole point: an inspector paid by the party being inspected is not independent of them. How it is handled contractually varies between projects, but the agency’s obligation runs to the owner and to the building official.

It depends on which scopes the project actually requires and how much inspector time each one needs. A project with continuous inspection across several concrete pours is not comparable to one needing periodic anchor inspection, so a scope has to be defined before a price means anything. Send the drawings and the inspection schedule and we will work out which inspections the project requires and return a written scope and price.

Inspectors hold certification for the specific scope they are inspecting — certification is issued per discipline rather than as one general qualification, so being certified for reinforced concrete does not make someone certified for structural welding. The agency’s engineering work is performed under a named California-licensed professional engineer. The building department reviewing your project may also have its own approval requirements for agencies working in that jurisdiction, which is worth confirming early.

A portable nuclear moisture-density gauge measures how well soil, aggregate base or asphalt has been compacted and how much water it contains, in place and within minutes. It does that using a sealed radioactive source, which is why possessing, transporting and operating one requires a radioactive materials licence and trained operators. MEI holds a radioactive materials licence issued by the California Department of Public Health for portable gauge operations.

Every test is run to a published method — an ASTM, AASHTO or equivalent standard that defines how the test is performed and how the result is calculated. Naming the method on the report is what lets a reviewer check the procedure rather than take the number on trust. We publish the methods we work to rather than describing tests generically.

Yes. Public works projects in California carry additional obligations, including registration with the Department of Industrial Relations and certified payroll reporting. MEI holds an active DIR public works contractor registration.

California public school and community college construction is reviewed by the Division of the State Architect rather than by a local building department, and DSA sets its own requirements for how inspection is carried out and reported. What applies depends on the individual project and on DSA’s requirements for it, so tell us about the project and we will confirm what is needed before quoting.