Date: 19 October 2020
The Fenestration Manufacturers Association (FMA), the Fenestration and Glazing Industry Alliance (FGIA) and the Window & Door Manufacturers Association (WDMA) have released a new document focused on replacement windows. FMA/AAMA/WDMA 2710-20, Guidelines for the Full Frame Replacement of Windows without Removal of Exterior Brick Veneer, covers the replacement of windows in residential and light commercial buildings of not more than three stories above grade in height, utilizing a membrane/drainage system, a surface barrier drainage or a wall system without a reliable membrane drainage system.
"This newly document is the first installation practice to address this window-wall condition, which also includes a 'decision-tree' matrix to guide installers to the most appropriate methods," said Jim Katsaros (DuPont Performance Building Solutions), co-chair of the Joint Replacement Window Task Group. "The task group evaluated numerous configuration variations and completed representative installations with comprehensive field testing in actual homes in Baton Rouge, Louisiana. Based on learnings from the field testing, an easy to follow, highly illustrated, robust installation method was developed, bringing much needed clarity to the complex world of replacement window installations."
FMA/AAMA/WDMA 2710-20 is focused on the full frame replacement without removal of external brick veneer. This document describes methods where the cavity between the wall and façade needs to be blocked and sealed.
Per the guidelines, a preliminary site inspection should be conducted prior to the start of the replacement project to identify any conditions that may impact building envelope performance. It is the responsibility of the installer to determine if this document is applicable to the replacement project, though the assistance of a design professional may be necessary if the existing water management system is found to be defective or inefficient. This guideline does not address any water management concerns beyond the window installation.