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FMA/WDMA 250-10 Installation of Non-Frontal Flange Windows with Mounting Flanges

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FMA/WDMA 250-10 Standard Practice for the Installation of Non-Frontal Flange Windows with Mounting Flanges for Surface Barrier Masonry Construction for Extreme Wind/Water Conditions is jointly published by WDMA and the Fenestration Manufacturers Associatiion (FMA). It covers the installation of non-frontal-flanged windows in new construction surface barrier masonry wall buildings of no more than three stories in height. This practice applies to non-frontal flanged windows which employ an integral or applied mounting flange that is attached and sealed to the window perimeter frame designed as an appendage that will cover a previously-installed buck and/or integrate with a pre-formed sill. This standard covers the installation process for windows from pre- to post-installation.

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