There are many acceptable ways to mount and detail windows for support and weather resistance. The QuickGuides linked below provides window installation instructions based on research conducted on walls with foam plastic insulating sheathing continuous insulation.
- Commercial Windows
- Residential Windows
- ABTG Research Report: Installation and Performance of Flanged Fenestration Units Mounted on Walls with Foam Plastic Insulating Sheathing
- ABTG Educational Program: Window Installation Methods for Frame Walls with Foam Sheathing
- ABTG Educational Program: Water, Wind, Windows & Walls with Continuous Insulation
- ANSI/ABTG FS200.1 - 2022: Standard for Use of Foam Plastic Insulating Sheathing (FPIS) in Building Envelopes: Above-grade Walls (See Section 3.6)
Four typical methods for window framing: