Window Wall

Products and Applications


Storefront and Entrances Window wall is defined in NAFS as, “A non-load-bearing fenestration system provided in combination assemblies and composite units, including transparent vision panels and/or opaque glass or metal panels, which span from the top of a floor slab to the underside of the next higher floor slab. NOTE: Window walls are available with separate or integral slab edge covers and can be fabricated from windows or curtain wall or storefront systems. Primary provision for anchorage occurs at head and sill conditions. Receptor systems can be designed as a part of drainage and movement accommodation provisions.”

Window wall “rests” on the floor below, and expands in the same direction as interior finishes, for easy interfaces at door openings and balcony slabs. Shear walls and changes in sill height are straightforward. Window wall can be installed in any sequence.

Window wall can be designed to look as much - or as little - like curtainwall as desired. Performance criteria are similar. Window wall made from window systems - like Wausau’s INvent™ product family - looks more “residential,” with expressed interior glazing beads, and framing sightlines interrupted by offsets. Optional beveled or profiled glazing rebates are available, while vents are integrated into framing. Structural silicone glazing is generally unavailable.

Window wall made from unitized curtainwall - like Wausau’s INvision™ product family - looks more “commercial,” with rectilinear mullion proles interior and exterior, and glazed-in insert vents. “Chicken head” starters are used at slab conditions. SSG is optional.

To learn more:

Download Wausau's "Window Wall Products and Applications" brochure [PDF]
Download Wausau's "Invent
™ Series" brochure [PDF]
Download Wausau's "Curtainwall and Window Wall" brochure [PDF]
Contact Wausau's high rise market manager at
View Wausau's window solutions for Apartments, Condos, and Hotels

INvision 5500i-SG

    • 2-1/4" structural silicone-glazed (SSG) mullions and intermediate horizontal framing members
    • 18 mm wide polyamide nylon thermal strut for energy efficiency and condensation resistance
    • Easy-to-install captured head and sill “can” receptors - Flush SSG sill and jamb receptors are available
    • No exterior unit wet sealing required; pressure-equalized, rain screen design
    • Less than 0.06 cfm/sqft air infiltration at 6.24 psf
    • 15 psf water test pressure; static and dynamic
    • Full AAMA 501 test protocol including interstory vertical and horizontal movement; thermal cycling
INvision 5500i-SG

INvision™ HR and HRX Unitized Window Wall and Curtainwall

    • 6-1/4", 6-1/2" and 7-1/4" frame depth with polyamide thermal barrier
    • Narrow 2 1/2” mullion sightlines
    • Transitions seamlessly from curtainwall to window wall
    • Pressure-equalized rain screen design
    • 15 psf static and dynamic water resistance
INvision™ HR and HRX Unitized Window Wall and Curtainwall

INvision™ 7250 and 7250i-UW Unitized Curtainwall

    • Engineered to meet typical institutional buildings’ span and wind load requirements
    • Interlocking frame design accommodates seismic, live load and thermal building movements
    • Two lines of defense against air and water infiltration- Pressure-equalized rain screen design
    • Water control and drainage at each unit
    • Two-level thermal barrier frames (7250i-UW) or thermally-improved (7250-UW)
INvision™ 7250 and 7250i-UW  Unitized Curtainwall

INvision™ 8000 and 8000i Blast Unitized Wall

    • Designed for compliance with GSA ISC Security Design Criteria and Department of Defense UFC 4-010-01 requirements
    • Blast performance exceeding 10 psi peak pressure, 89 psi-msec impulse
    • Accepts a variety of security glazing types
    • Interlocking frame design accommodates seismic, live load and thermal building movements
    • Pressure-equalized rain screen design
INvision™ 8000 and 8000i  Blast Unitized Wall


    • Control solar heat gain and harvest natural daylight to meet sustainable design goals
    • A variety of pre-engineered configurations and types
    • Extruded blades, perforated sheet, “catwalk” grids or solid shading
    • Modular design and integral alignment features for ease of installation