The American Architectural Manufacturers Association has released two new specifications: one for door bottom weatherseals and one for exterior stain finishes on wood and other materials.

First, AAMA 703-11, Voluntary Specifications for Non-Integral Door Bottom Weatherseals, establishes minimum performance requirements for sweep-type, non-integral door bottom weatherseals.

“The standard for AAMA 703-11 is based on the in-service requirements of door products to maintain acceptable levels of air leakage resistance, water penetration resistance and operating force throughout its design life,” says Mark Fortun, Endura Products, and chair of the door bottom weatherseals task group. “Accordingly, door products are manufactured from various framing materials, such as aluminum, steel, wood, vinyl and fiberglass, which interact with sealing systems in two ways.”

Fortun explains that the first interaction is attributed to “user stresses” that are induced through repeated opening and closing of door panels throughout the design life of the product. Secondly, door bottom weatherseals and framing materials experience environmental weathering elements, such as heat, UV and moisture. Together, these elements affect door framing materials and over time, induce mechanical, chemical and thermal stresses on door bottom weatherseals.

The second, AAMA 633-11, Voluntary Specification, Performance Requirements and Test Procedures for Exterior Stain Finishes on Wood, Cellulosic Composites and Fiber Reinforced Thermoset Window and Door Components, covers factory-applied coatings intended for service in exterior environments and describes test procedures and performance requirements for exterior stain finishes for doors, windows and similar building products.

The document is intended to assist the architect, owner and contractor in specifying and obtaining factory applied stain finishes. Provisions within AAMA 633-11 include a general overview, specific test specimens and procedural tests sampling for color uniformity, specular gloss and film adhesion, chemical resistance and detergent resistance, humidity resistance, cold crack cycle and oven aging and weather exposure.

“Many window and door profiles have exterior stain finishes to provide selected colors and appearances and to enhance the durability of the product,” says Wallace Kesler, Valspar, and chair of the AAMA exterior stain task group. “AAMA has now set the one performance specification for exterior stain finishes, which will provide a good level of performance of film integrity, exterior durability and general appearance over a period of many years.”

To order either of these specifications visit the AAMA online Publications Store.


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