NW Aluminum 840

Slimmest Aluminum Framed Folding Glass Door for Superior Thermal Performance and Taller Heights

Our most energy efficient thermally broken system
Ultraslim panel frame measuring 1 3/4" (45 mm)
Floor supported panels capable of heights up to 11′ 6″ (3500 mm)

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Generation 4 Folding Glass Door

Our Slimmest Aluminum Frame

The slimmest aluminum frame of the NanaWall accordion glass doors product line. With a frame profile styled in a crisp, angular design, the intersection of two folding panels is a mere 3 7/8" (99 mm). This floor supported system offers an extremely streamlined appearance with minimal exposed hardware, creating a new level of aesthetics.

Fourth Generation Thermally Efficient Aluminum Framed Folding Glass Door

NW Aluminum 840 floor supported panels are capable of heights up to 11' 6" (3500 mm). As a custom-built architectural solution, this system is available in inswing or outswing configurations and can accommodate open corner designs.

Put through rigorous independent performance testing, this next generation system is designed from the ground up and, as a result, is our most thermally efficient aluminum framed folding glass door.

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Broad Product Configurability

Panel sets are able to move and stack either to the right, left, or center within the same track allowing the panels to be stacked in the most convenient location as needed.

Generation 4 Features

Flexible Stacking and FourFold or SixFold Panel Sets

NW Aluminum 840 is the only floor supported, thermally broken folding system available that allows for larger opening sizes and flexible space management with the integration of FourFold or SixFold Panel Sets. These panel sets can move and stack either to the right, left, or center within the same track allowing the panels to be stacked in the most convenient location as needed.

Floor Supported Technology for Long-Term Durability

Glass walls generic V002-210512 roller animation

Floor supported systems are ideal for applications where load-bearing capability of the header is a concern.

Provides long-term durability and smooth operation.
Control construction costs. Requires less header load and limits the need for extensive pre-cambering.
Improves the likelihood of keeping existing header when retrofitting/remodeling.

Swing Doors for Traffic Management

To accommodate traffic flow, swing panels can be added either to the end of a chain of panels for systems with an odd number of panels folding in one direction or hinged to the side jamb, depending on unit height and configuration.

An up to 3' 3" (1000 mm) swing panel hinged to the side jamb is available. Swing doors can be optionally outfitted with higher kickplates for ADA compliance. Panic hardware and top door closers by others are possible.

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Three Sill Options with High Heel Resistant Feature

NW Aluminum 840 has three sill options: Performance, Low Profile Saddle, Low Profile Saddle with UniverSILL®. Standard to all sills is removable aluminum high heel resistant sill inserts. These inserts provide ADA compliance for the Low Profile Saddle and create a very barefoot-friendly transition. Furthermore, the inserts offer protection from dirt and debris collecting in the bottom track.

Sill Options

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Unique Gothic Arch Roller

The running carriage rolls above the water table on two stainless steel wheels with a unique Gothic arch design supported by a double row of ball bearings. With a 2-point contact of each wheel to the floor track, the system glides quietly and smoothly with less friction by providing an equal distribution of weight on the stainless steel track.

Explore the Features and Benefits of Generation 4

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Installation Mounting Plate for Ease of Installation

Stainless steel for clean appearance with sealing cushion to avoid thermal conductivity
Provides optimal load transfer so less connection points required

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Multipurpose Frame Insert for a Streamlined Look

For enhanced aesthetics, all frame attachment points are hidden
Provides an extra boost to thermal and acoustical performance
Offers space for concealed cable routing for security systems by others

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System Width Adjustment Feature for Consistent Seal Compression

Patented lateral adjustment of +/- 3/16″ (5 mm) to allow for construction tolerance
Adjusts easily should extreme panel expansion/contraction occur

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Panel Guide in Head Track

Panel guide helps system glide through head track with smooth operation
System operated on floor supported technology for ease of movement

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Anti-tilt Feature for Floating Panel Sets in Head Track

Proprietary engineered component stacks FourFold and SixFold panel sets neatly and securely when in open position
Allows for dynamic stacking of panels at the left, right, or center of opening

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Optional Mechanism for State-of-the-Art Security

Lock monitoring is available with Reed contact (by others) and specialized magnetic locking rod end cap to connect to home security systems
Can be connected to count opening/closing cycles to identify when maintenance should be performed (by others)

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Slimmest Aluminum Panel Profiles Available

Crisp, angular profile design for a modern aesthetic
Intersection of two folding panels is a mere 3 7/8″ (99 mm) for minimal sightlines
Flat handle multi-point secure locking with 1″ (24 mm) throw bolt top and bottom

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Multifunctional Thermal Break for Maximum Energy Performance

The Bionic Turtle® single piece thermal break provides outstanding insulation within frame profiles
Unique patented design houses the system’s locking rods to afford the extremely slim profile appearance

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Concealed Panel Alignment Reduces Visible Hardware

Hidden spring-loaded TwinX mechanism aligns panels over 7′ (2150 mm)
Patented TwinX interlocks panels and provides structural reinforcement to eliminate exposed hinges in the middle of the system

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Aluminum Sill Insert for High Heel Protection

Creates barefoot and heel friendly transitions while protecting from debris accumulation in floor track
Provides ADA compliance for Low Profile Saddle and Flush sills
Produces channel for LED rope light floor illumination (by others)

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Low Profile Saddle Sill with UniverSILL Insert

Available for outswing only
Thermally broken, provided with high heel resistant insert
Easily convert Saddle Sill into a Hybrid Sill for enhanced water rating and air protection as needed
Unique Gothic arch roller design for effortless operation

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Low Profile Saddle Sill

Outswing shown, inswing also available
Thermally broken, ADA compliant, high heel and barefoot friendly
Sufficient water rating provided
Unique Gothic arch roller design for effortless operation

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Performance Sill for Highest in Class Weather Resistance

Outswing shown, inswing also available
Thermally broken, provided with high heel resistant insert
Built for higher water rating and weather resistance with compression gasketing on all sides
Unique Gothic arch roller design for effortless operation

Inspiration for Your Next Project

View More Project Inspiration

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A modern living room with a large sectional sofa, a brick fireplace, floor-to-ceiling accordion glass doors offering a stunning view of trees and a body of water.

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A modern living room with folding patio doors reveals a view of a lake and landscaped garden.

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Modern living room with large windows and glass wall panels providing a view of an outdoor landscape.

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Modern living room with all glass walls overlooking a patio and lawn beside a lake.

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A modern kitchen featuring a large island with a stone countertop and large opening folding glass walls offering a view of the lake and trees in the background.

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Modern kitchen and dining area with wooden cabinetry and a large island, opening to an outdoor patio. Sunlight streams through the open accordion doors, illuminating the space.

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A modern dining area adjacent to floor-to-ceiling glass doors that offer a stunning view of the lake and trees.

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A modern two-story house with large glass wall panels, surrounded by trees and greenery, featuring a spacious patio.

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A modern house with large windows stands on the edge of a wooded area overlooking a lake at sunset.

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Aerial view of a modern, white flat-roofed house surrounded by lush trees, located near the edge of a large lake.

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Architectural floor plan depicting a modern home with a living room, dining area, kitchen, bedrooms, bathrooms, and an outdoor patio.

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Mountain pool house with a modern living room - Interior folding walls

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A modern home with bifold glass walls, offering a seamless connection to the large patio and outdoor dining area

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A modern home with bifold glass walls and a large swimming pool

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A modern house with folding patio doors and a swimming pool.

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Contemporary house with Generation 4 bifold glass walls embracing a green lawn

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A modern living room with folding glass walls showcasing exquisite interior design

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A modern living room featuring aluminum framed bifold glass walls

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A modern living room with outdoor lifestyle and bifold glass walls

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A contemporary living room featuring aluminum framed bifold glass walls, creating an indoor/outdoor area

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A house featuring a swimming pool and folding patio doors

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Contemporary pool house with bifold glass walls creating an indoor/outdoor area

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A contemporary home with bifold glass walls and a large swimming pool

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ADU features a SixFold panel set configuration unique to Generation 4 folding glass walls

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ADU features folding glass walls with SixFold panel set configuration

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A modern pool house with bifold glass walls and a patio

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A modern living room with large opening glass walls

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A living room with large opening glass walls

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A living room with large opening folding patio doors

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A bedroom with a large bed and folding glass doors

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A bedroom with bifold glass walls leading to a pool

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An aerial view of a home with bifold glass doors, a pool, and a golf course

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Residential unhinged pairs panels - folding exterior

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NW Aluminum 840 living room large opening folding glass walls

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Modern home with large folding glass doors opening to a spacious outdoor patio, seamlessly connecting to an open-concept dining area and living room.

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NW Aluminum 840 green building exterior with folding glass walls

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Pool house with NW Aluminum 840 folding doors

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Modern pool house ADU with bifold glass doors opening to lounge and kitchen by the pool

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NW Aluminum 840 - a person standing in a dining room with large windows

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Person standing at open four-panel bifold glass doors, leading from a modern interior to a patio with outdoor furniture and greenery.

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NW Aluminum 840 Residence with open floor plan and glass walls to backyard

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Outdoor pool area with lounge chairs and umbrellas in front of a white house featuring large windows and folding glass walls leading to an indoor room.

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White house with a driveway - NW Aluminum 840 residential glass walls

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NW Aluminum 840 Modern living room with a large glass wall - Closed interior

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Modern house with a wooden exterior and large, slim aluminum-framed folding glass doors for superior thermal performance, opening to a patio.

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Modern dining area with mountain views through large folding glass doors that open to a deck.

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NW Aluminum 840 modern dining room with folding glass walls

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A group of people sitting around a dining table and opening patio folding doors

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Living room with an open corner folding glass walls

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Large dining room with mountain view - closed glass walls

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Dining room with open corner folding glass walls and view of the mountains

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Hotel del Coronado lobby entrance — one guest seated on a bench, two walking near open bifold glass doors.

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Unparalleled Performance You Can Count On

Extreme Weather Resistant

Energy-efficient by design, our glass walls keep the elements at bay, ensuring that even as seasons or temperatures change, your interior comfort will always remain the same.

Certified Testing Standards

NanaWall products endure the latest AAMA testing standards for air, water, structural, and forced entry.

Highly Energy-Efficient

Designed to keep the elements at bay, holding warmth inside while acting as a transparent barrier to the weather outside.

Sustainable Design

NanaWall products contribute to multiple LEED rating systems and potentially several credit categories.

Test Results

Inside Generation 4 walls are innovations designed to meet the challenges of wind, water, extreme temperatures, forced entry, and structural load. Besides housing the system’s locking rods, our Bionic Turtle®—a patented, single-piece insulbar design—provides an exceptional insulating thermal break between the frame profiles: adding energy efficiency and year-round comfort.

Florida Product Approval #40273

See Air, Water, Structural, Thermal, and Forced Entry Results

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Performance When Closed Matters Most

Large openings are easy to design and there are many options to choose from. When selecting a product that best fits your project, how it performs when closed is important.

What Our Customers Have to Say

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Dual-height wood framed bifolding glass windows and glass walls at Brooklyn Brownstone

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Modern kitchen with window-door combination folding glass doors, seamlessly opening to a patio with outdoor furniture and lush greenery.

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Modern kitchen and dining area with wood-clad folding glass doors that open to a stylish outdoor patio for seamless indoor-outdoor living.

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Person entering a modern home through open wood-framed swing doors from a wooden deck patio.

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Modern kitchen with retractable glass wall that opens the kitchen to a patio. Three people relax in a modern home with a retractable glass wall that opens the kitchen to a patio; two people sit outside amid greenery, while one sits on indoor steps next to houseplants.

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Woman steps onto a patio through wood-framed glass swing doors as a boy sits on wooden steps inside a bright, plant-filled modern kitchen with natural light.

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Brooklyn Brownstone

Creating the New Family Living Space for homeschooling, COVID-19 safe open-air play dates, dining area and outdoor movie night.

See Case Study

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Lumen, a glass-walled restaurant featuring floor-to-ceiling bifold glass doors that seamlessly connect the indoor and outdoor dining spaces.

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Stylish modern restaurant with floor-to-ceiling glass walls, sleek interior seating, and street-facing glass doors.

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Lumen

Opening glass walls allowed Lumen Detroit to continue operations in the face of Covid lockdowns while maintaining customer loyalty and revenue.

See Case Study

“Given the choice of multi-leaf partition systems, there really are few products with the proven track record to sustain the day-to-day use of an automotive retail environment—which is why we chose NanaWall.”

— Erich "Deeg" Snyder, Gensler, Architect

See Case Study

Options to Perfect Your System

Slimline Steel Effect Options

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With the slim nature of Generation 4 products, NW Aluminum 840 can be customized with popular DB colors for a truly classic steel look while benefitting from the superior performance of an aluminum folding glass door. Simulated divided lites (SDL) can be specified in patterns of your choice.

Slimline Steel Effect

Hundreds of Powder Coating Finishes

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50 standard colors that come at no additional cost, with an additional 200+ colors to choose from.

See Finish Options

Sill Options

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NW Aluminum 840 has three sill options: Performance, Low Profile Saddle, Low Profile Saddle with UniverSILL®.

Standard to all sills is removable aluminum high heel resistant sill inserts. These inserts provide ADA compliance for the Low Profile Saddle and create a very barefoot-friendly transition. Furthermore, the inserts offer protection from dirt and debris collecting in the bottom track.

See Sill Options

Locking for Maximum Security

Glass walls multi-point locking animation

Standard to the system is concealed locking between folding panels that operates with a 180° turn of a flat handle.

See Locking Options

Glazing Options and Thermal Efficiency

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The system comes standard with continuous seals along the face of each panel frame. Furthermore, standard to each system are two levels of insulating thermal breaks for optimal defense from heat and cold. For projects requiring even more protection, an optional third level may be added.

The glass pocket is able to accommodate glass from 7/8" (22 mm) double glazed to 2 7/16" (62 mm) double or triple glazed insulated glass. All glazing is reduced iron (LT 89). Please contact NanaWall Systems for more details.

See Glazing Options

Stylish Handles in Multiple Finishes

Our handles are both functional and stylish and can be customized to accentuate your space and reflect your style.

See Handle Options

Generation 4 Tilt Turn and Fixed Windows

Generation 4 Tilt Turn and Fixed window systems offer concealed hinge hardware and the same clean lines as our accordion glass doors.

Generation 4 Tilt Turn and Fixed Windows

Retractable Screens

A retractable screen add-on is perfect for blocking bugs while providing privacy and fresh air. Screens are not available through NanaWall Systems.

Retractable Screens

Flexible Configurations to Fit Your Environment

Standard Configurations