WDMA, FMA, FGIA publish new guidelines for replacing windows without removing the outer brick veneer

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WDMA, the Fenestration Manufacturers Association, and the Fenestration and Glazing Industry Alliance have released a new document that focuses on replacement windows. FMA / AAMA / WDMA 2710-20, Guidelines for Complete Frame Replacement of Windows Without Removal of the Outer Brick Veneer, includes replacement of windows in residential and commercial buildings with no more than three stories above height using a membrane / drainage system, surface barrier drainage or Wall system without a reliable membrane drainage system.

“This new document is the first installation practice that addresses this window wall condition. It also includes a ‘decision tree’ matrix that guides installers to the most appropriate methods, ”said Jim Katsaros, DuPont Performance Building Solutions, co-chair of the joint replacement window task force. “The working group evaluated numerous configuration variants and completed representative installations with extensive field tests in actual houses in Baton Rouge, Louisiana. Based on the findings from the field tests, an easy-to-follow, well-illustrated and robust installation method was developed that gives the complex world of replacement window installations the much-needed clarity. “

FMA / AAMA / WDMA 2710-20 focuses on complete frame replacement without removing external brick veneer. This document describes methods in which the cavity between the wall and the facade must be blocked and sealed.

According to the guidelines, a preliminary on-site inspection should be performed prior to starting the replacement project to identify any conditions that may affect the performance of the building envelope. It is the installer’s responsibility to determine whether this document applies to the replacement project. However, assistance from a design professional may be required if the existing water management system is found to be defective or inefficient. This policy does not address water management concerns beyond window installation.

FMA / AAMA / WDMA 2710-20 is available from FMA, FGIA or WDMA.




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