Xtend Framing Overview and Rough-Opening Dimensions
A multi-view framing reference for the Xtend porch window system, showing the minimum and maximum sizes for windows, doors, and transoms along with the mounting-surface widths needed to accept the flanges. This is the document to use when framing the rough opening.
What this document covers
This drawing gives the framing dimensions for laying out openings before the units arrive — single and mulled windows, doors, and fixed glass transoms — with the minimum mounting-surface widths the flanges require.
- Minimum and maximum window sizes (single and mulled)
- Maximum door size and required framed glass height
- Fixed glass transom dimensions
- Minimum mounting-surface widths to accept the mounting flanges
- Multiple views showing how windows, doors, and transoms frame together
Key dimensions at a glance
- Single or mulled window: 16"–18" minimum width, up to 108" height; mulled units have no maximum width (not load bearing)
- Door: up to 42" wide x 96" high, with 36" of framed fixed glass required and a 60" maximum below the transom
- Fixed glass transom: up to 48" wide x 96" high; all fixed glass units are one light
- Mounting surfaces: 1"–2" minimum widths shown to accept the flanges — wider is fine
Framing notes
All mounting surfaces must be in the same plane. The widths shown are minimums needed to accept the window and door mounting flanges — wider mounting surfaces are perfectly acceptable. The drawing is not to scale; use it for relationships and minimum dimensions, and refer to the individual profile and door drawings for exact cross-sections.
