| Coating chemistry | Clear identification of the coating type, resin chemistry, coating system, and intended exterior use. “Fluorocarbon” alone does not establish a specific formulation or performance level. | Request the coating product data sheet, technical specification, and written confirmation of the coating system proposed for the project. | Specifications identify the actual system and do not rely on a general coating description alone. |
| Coating performance standard | Evidence that the finish meets the performance standard specified for the project. AAMA 2605 is a specification for high-performance organic coatings on architectural aluminum; the required standard should be stated in the contract documents. | Review current test reports or a valid certification covering the specified coating system, substrate, and application process. Confirm the applicable standard edition and scope. | Documentation matches the proposed finish and project requirements rather than referring to an unrelated product or test. |
| Surface preparation and application | Documented pretreatment, cleaning, coating application, and curing controls appropriate to the coating system and aluminum substrate. | Review process-control records, production inspection procedures, and sample finish panels. Ask how the manufacturer tracks batches and corrective actions. | Process steps and inspection responsibilities are defined and consistently recorded. |
| Coating thickness and appearance | Specified dry-film thickness, consistent color and gloss, and a finish free from unacceptable defects such as blisters, bare spots, or visible contamination. | Compare production samples with approved samples; request thickness and visual-inspection records using the project’s specified methods and tolerances. | Acceptance criteria are agreed in writing before production, including how measurements and appearance are assessed. |
| Adhesion and durability testing | Test evidence relevant to coating adhesion and environmental exposure. ASTM D3359 is a commonly used tape-test method for assessing adhesion; test results must be interpreted against the applicable specification. | Check reports for the test method, specimen details, coating system, test date, laboratory, and stated acceptance criteria. Confirm that reports apply to the proposed finish. | Reports are traceable to the coating system being purchased and are evaluated against defined requirements. |
| Finished-window performance | Air leakage, water penetration resistance, and structural performance for the complete window assembly—not just the aluminum profile or coating. | Request test reports for the relevant window type, size, configuration, hardware, and glazing. Depending on the project, applicable methods may include ASTM E283, ASTM E331, and ASTM E330. | Tested configurations are representative of the specified product; any differences are explained and supported by appropriate engineering or test evidence. |
| Materials and component traceability | Identification of aluminum profiles, finish batches, glazing, hardware, seals, and other critical components used in each order. | Review purchase specifications, batch records, inspection logs, and sample labels linking materials to production and delivery documents. | Records allow a delivered unit or finish batch to be traced to its materials and inspection history. |
| Quality management and inspection | Defined incoming, in-process, and final inspections, with documented handling of nonconforming products. | Review the quality manual or inspection plan, sample inspection records, and corrective-action procedures. Verify any claimed certification with its issuing body. | Quality claims are supported by current, verifiable records and a clear process for resolving defects. |
| Warranty and service support | Written coverage for the finish and window components, including exclusions, maintenance requirements, claim procedures, and geographic limitations. | Review the actual warranty document and confirm that the quoted product, coating, project location, and installation conditions are covered. | Warranty terms are available before purchase and align with the project’s expected use and maintenance plan. |
| Pre-shipment inspection and packaging | Final checks for dimensions, operation, finish condition, labeling, and protection against handling or transport damage. | Request a sample pre-shipment inspection report and packaging details; agree on inspection points and defect recording before dispatch. | Inspection records and packaging requirements are documented and tied to the order. |
| Supplier comparison | Comparable specifications, test evidence, warranty terms, lead times, and inspection commitments across shortlisted suppliers. | Use the same written project specification and request the same supporting documents from each supplier before comparing quotations. | Selection is based on verifiable product and service evidence, not price or unsubstantiated performance claims alone. |
| Important qualification | Test methods and acceptance limits are not interchangeable, and no single test establishes overall window quality. Confirm applicable standards, editions, performance classes, and acceptance criteria with the project specification and qualified design professionals. |