Xtend Single Window Head and Sill Profile

Header and sill cross-sections for the single Xtend 4-vent porch window, showing how the top and bottom members meet the framing, where the brush weather strips sit, and the sill sealant detail that lets any water drain back out.

What this document covers

This drawing details the head and sill members for a single Xtend window. Pair it with the side profile to lay out the complete opening before ordering or framing.

• Header (top member) cross-section
• Sill (bottom member) cross-section
• Flange placement against the framing
• Brush weather-strip locations
• Sill sealant detail for water drainage

Key specifications at a glance

• Window height: frame opening less 1/4"
• Framing: 1" thick inset framing
• Extrusion: 16 ga powder-coated aluminum, approx. 1/16" thick
• Trim: exterior trim may be installed over the flanges; provided screws are flat-head and color matched
• Scale: 1:2

Installation notes

Sealant: apply sealant behind the flange, but never under the sill flange — leaving the sill flange unsealed lets any water that gets in drain back out. Weather strips: brush weather strips are positioned as shown on the drawing. Note: windows under 60" in height use 3-vent panels utilizing the 3 outer tracks.