The submittal package: samples, product data, and the paper trail a specifier reviews
What a contractor is required to submit before the first roll is hung, and what a specifier is actually checking when the package lands on the desk.
After a project is awarded, the specification's submittal requirements come due. For wallcovering, the contractor typically owes product data, verification samples, and, for anything with a repeat, a control sample from the actual production run. Reviewing that package is a specifier's last checkpoint before material is ordered and the decision becomes expensive to reverse.
Product data is checked against the section line by line. If Part 2 called for an ASTM F793 category and ASTM E84 Class A, the submitted data sheet has to show both, tested, not asserted. A data sheet that lists a Class A rating "when applied over a noncombustible substrate" is a conditional pass, and the specifier records the condition so the field crew honors it, because ASTM E84 rates an assembly and the substrate is part of the claim.
Samples serve a different job. A verification sample confirms color and texture against what was selected, but a run sample confirms that the dye lot the contractor actually bought matches. This is where a specifier writes the note that saves the job: require that all material for a continuous space come from a single production run, and that the contractor submit run numbers with the samples. Two rolls that read identically on a desk can differ visibly on a wall under raking light.
The review stamp carries a specific, limited meaning, and it is worth quoting the source. AIA Document A201, the standard general conditions, states in its submittals article that the architect's review is for conformance with the design intent and does not relieve the contractor of responsibility for dimensions, quantities, or means and methods. So "Reviewed" or "No Exceptions Taken" is not approval of the contractor's field work. A specifier who understands that line reviews for conformance to the documents and leaves execution with the contractor, which is exactly where the A201 draws it.