| AAMA 2604 exposure evidence | Ask for test documentation identifying the coating system, aluminum substrate, test method, and exposure period. | AAMA 2604 evaluates high-performance organic coatings using a five-year South Florida outdoor exposure benchmark. Commonly cited limits include color change of no more than 5 Hunter ΔE units and a chalk rating of at least 8. | It provides a documented way to compare coating weatherability. A general statement such as “weather resistant” is not equivalent to evidence that the specific finish meets the specification. |
| Exact finish covered by the test | Confirm that the tested coating, color, and coating process match the pergola finish being quoted. | Request the test report or a traceable compliance statement for the specified finish; do not assume results for one color or coating formulation apply to every finish. | Colorants, coating formulations, pretreatment, and application processes can differ, so the scope of the evidence matters. |
| Color and chalk resistance | Check whether the documentation reports color change and chalking after the outdoor exposure period. | Use the AAMA 2604 benchmark values above as screening points, and verify the applicable edition and test results with the supplier. | Sunlight and weather can gradually alter appearance. Chalking is a powdery residue that can form as a coating weathers. |
| Coating film condition | Look for reported observations of cracking, checking, blistering, or peeling after exposure. | Ask whether the test report records film integrity, not just color or gloss measurements. | A finish can change in appearance and still require separate assessment for visible coating defects. |
| Coastal or high-salt location | Tell the supplier if the installation is near salt water or regularly exposed to salt-laden air. | Ask for the coating system’s corrosion-resistance test data and the manufacturer’s maintenance guidance for the intended environment. | South Florida weathering exposure is useful for coating comparison, but it does not by itself establish the corrosion resistance of the entire pergola assembly or its hardware. |
| Aluminum and pretreatment | Confirm the frame material and ask how the aluminum is cleaned and pretreated before coating. | Request written details for the coating system and pretreatment used on the actual frame components. | Coating performance depends on the prepared substrate and application process as well as the coating material. |
| Louver operation and water management | Review the louver control, drainage path, and instructions for closing or opening the roof. | Ask for product-specific operating and drainage information; do not infer wind, rain, or snow capacity from the coating specification. | AAMA 2604 assesses coating performance, not the pergola’s structural design, weather rating, or drainage performance. |
| Installation and maintenance | Check installation requirements, cleaning instructions, and warranty exclusions before purchase. | Get the applicable written instructions and warranty for the selected model and finish. | Correct installation and routine cleaning help preserve appearance and make it easier to identify wear or damage. |