What Are Submittals in Construction?

The submittal process exists to close the gap between what was specified and what will actually be installed. A specification describes performance and requirements; a submittal shows the specific product, the specific fabrication, the specific mix.

Reviewing it is how the design team confirms the two match before money is committed and steel is cut. Everything about the process — the register, the review actions, the resubmittal cycle — follows from that single purpose.

Sequence is what makes submittals matter to the schedule. Nothing long-lead can be released until its submittal clears, so a submittal register is effectively a procurement schedule wearing different clothes.

Curtain wall, switchgear, elevators, structural steel and mechanical equipment all have lead times measured in months. A submittal that sits in review for three weeks, or comes back as revise and resubmit, moves the delivery date by that much. Experienced project managers read the submittal log the way they read the critical path.

Approving a submittal confirms conformance with the design intent expressed in the contract documents. It does not accept responsibility for dimensions the contractor is required to verify, for quantities, or for the means and methods of fabrication and installation.

Review stamps say this explicitly, and the wording matters — the whole allocation of risk in the process depends on it. "Approved as noted" carries the same weight as approved, with the noted corrections binding; "revise and resubmit" restarts the cycle and, on a long-lead item, the clock.

The two are routinely confused, including in software that should know better. The submittal is the content under review. The transmittal is the record of transmission: what was sent, by whom, to whom, on what date, and in what revision.

The transmittal is what proves a package was issued on a particular day, which is why it is the first thing anyone reaches for in a delay claim. A submittal without a transmittal record is difficult to defend on a timeline.

A product data sheet has to be checked line by line against the specified requirements — performance values, standards compliance, finishes, dimensions, warranty terms — and any deviation flagged. On a large project this runs to thousands of pages.

Reviewers under deadline pressure skim, and the deviations that get missed are the ones that surface during installation. The review is not intellectually hard; it is long, and it demands attention that does not degrade over hundreds of pages.