Back to Powder Coating Basics
November 22, 2017The Importance of Associations and Standards for Powder Coaters
April 22, 2024The construction industry always faces the challenge of ensuring architectural structures' longevity and visual appeal in the face of environmental challenges.
Architects, project managers, engineers, and those within the powder coating industry often struggle to understand the specifics of these standards to use them effectively.
This article aims to demystify AAMA 2603, 2604, and 2605 and highlight their significance in the realm of coating technology.
Decorative architectural landscape feature at Latimer Heights, Langley BC
Understanding AAMA 2603, 2604, and 2605
The AAMA, or American Architectural Manufacturers Association[i], defines standards and performs rigorous testing to verify the durability of different coatings for architectural use on aluminum. AAMA 2603, 2604 and 2605 are three standards that pertain to organic coatings on architectural aluminum extrusions and panels, and they outline the performance requirements for coatings used on building components.
- AAMA 2603: This is a basic standard that has minimal color and gloss retention requirements.
- AAMA 2604: This standard identifies coatings that offer good color and gloss retention, lasting for years without fading or chalking, despite exposure to intense sunlight and weather.
- AAMA 2605: AAMA 2605 is an even higher standard, specifying coatings that exhibit exceptional resistance to UV radiation, chemical agents, and humidity. This ensures that the building envelope's aesthetics remain vibrant and unblemished over the long term.
These standards underscore the commitment to delivering top-tier exterior architectural coatings that can stand up to a wide variety of environmental challenges – wind, rain, sun, and corrosive environments.
Following is an overview of key AAMA standards and tests:
Test | AAMA 2603 | AAMA 2604 | AAMA 2605 |
Gloss (ASTM D 523) | Within +/- 5 units of manufacturers recommended values | ||
Outdoor weathering exposure time (S. Florida) | 1yr | 5yr | 10yr |
Color Retention (After Weather Exposure) | Slight change | 5 year fade: delta E < 5 | 10 year fade: delta E < 5 |
Gloss Retention (After Weathering) | No Specification | 5 years > 30% retention | 10 years > 50% retention |
Erosion Resistance (After Weathering) | No Specification | 5 years < 10% loss | 10 years < 10% loss |
Superior Performance, Greater Resilience
While AAMA 2605 holds the highest performance ranking of the three specifications, often times AAMA 2604 is most suitable for applications that are ground level or within reach of passersby. The UV and Gloss retention is rated to 5+ yeas as opposed to the 10+ years of 2605, however the durability of the coating system is better suited to handling. AAMA 2604 is commonly referred to as Super Durable.
For product that is on building facades or out of reach, architects and building owners can be confident in their structures being coated to AAMA 2604 or AAMA 2605. They will maintain their beauty and performance for decades, reducing the need for maintenance and minimizing lifecycle costs.
Implications in the Design Process
Understanding AAMA specifications is paramount for architects and designers. The choice of coating can significantly impact not only the aesthetic appeal but also the overall performance of a building. Specifying coatings that meet AAMA guidelines ensures that the project's design intent is protected and that the structure maintains its envisioned look for many years to come.
Additionally, these specifications can influence material choices and the selection of a building's components to ensure that the entire system, including the coating, meets the desired performance standards.
[i] AAMA is now known as FGIA (www.fgiaonline.org)
Compliance and Certification
Achieving AAMA 2603, 2604 or 2605 certification for aluminum architectural product manufacturers is a rigorous process. AAMA-certified coatings undergo a battery of tests, including accelerated weathering, salt spray, and chemical resistance tests, to simulate real-world environmental exposure.
Compliance with these standards assures architects and builders that the coating will perform as expected and that the manufacturer is committed to delivering high-quality, resilient products.
Alternatives and Equivalents on alternate substrates
While AAMA specifications are specific to aluminum substrates, other coating systems exist for different materials that can offer similar performance. Specifically, mild steel, cold rolled steel, hot dipped galvanize, and stainless steel can all benefit from the aesthetic benefits of coatings that are compliant with AAMA 2603, 2604, and 2605 performance requirements. Professionals in the industry need to be aware of these alternate options in case the project requirements dictate the use of different substrates.
On the left, top coated skylight frames are visible with AAMA 2604 Coating. On the right, an applicator applies the powder.
Integration with Sustainability Goals
Sustainable construction practices are increasingly becoming a priority for the industry. High-durability coatings that meet AAMA standards can play a critical role in ensuring the longevity of a building's exterior, reducing the need for maintenance and re-coating over time.
By selecting coatings with superior performance, architects and builders contribute to the long-term sustainability of their projects, minimizing the environmental impact associated with premature
The Future of Coating Technology
Advancements in material science and coating technology continue to push the boundaries of what is possible for architectural coatings. New formulations that offer enhanced durability, improved application properties, and reduced environmental impact are continually being developed.
Architects and builders must stay informed about these developments to take advantage of the latest coating solutions that can elevate their projects and enhance their performance.
Application and Maintenance Consideration
While selecting a high-performance coating is crucial, proper application and ongoing maintenance are equally important. Coatings must be applied according to the manufacturer's specifications for optimal performance. Regular inspections and proper care can extend the life of the coating, ensuring that it continues to protect and beautify the building for years to come.
In the case of alternate substrates, the powder coating shop must have the proper surface preparation equipment in place to ensure that preparation and coating happen concurrently. Sandblasting is the preferred method of preparing alternate substrates for AAMA compliant coatings.
Conclusion
Architects, designers, and all those involved in the construction process must be familiar with these standards to make informed decisions that contribute to the integrity and lasting appeal of the structures they create. It is also important to remember that the color and gloss provided in an AAMA compliant coating system can be achieved on variety of substrates – but only aluminum is truly consistent with the requirements of the AAMA voluntary specification.
By integrating the right coatings, professionals can ensure that their designs withstand the test of time, embodying the very essence of architectural performance.
Looking for More Information?
