AAMA Compares Condensation Ratings


In a new guidance document, the American Architectural Manufacturers Association compares three common rating systems for condensation on interior surfaces of fenestration products.

While root causes range with occupancy and climate, the formation of condensation on these surfaces in the winter months is deemed problematic in most modern buildings, according to the AAMA.

The new document, "A Comparison of Condensation Rating Systems for Fenestration" (AAMA CRS-15),  offers a comparison of the tools available for rating fenestration systems for condensation resistance, while also addressing some of the common causes and related technical issues with condensation.

A Single Resource

The document was developed to provide a single resource on the most common rating systems, according to Doug Holmberg (Apogee Enterprises), co-chair of the Condensation Ratings Comparison Task Group.

"It also provides information on how each rating is calculated," he said.

residential application

Window condensation ratings can be difficult to understand and that question has been further complicated by the use of different methods to rate condensation resistance, according to Steve Strawn.

Steve Strawn (JELD-WEN), co-chair of the task group, also notes that window condensation ratings can be difficult to follow.

"We have attempted to summarize through this document how each of the ratings are calculated and will remind the reader that the results are not directly comparable," said Strawn. "When comparing products side by side, specifiers should ensure that they are comparing products that have the same condensation rating method."

AAMA CRS-15 is available for purchase via AAMA's Publication Store.


Tagged categories: AAMA; Building Envelope; Certifications and standards; Coating failure; Condensation; Fenestration; North America; Windows

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