Generation 4 Folding Glass Doors
A Transformational Product Family Made by Originals, for Originals
Generation 4 walls are engineered with a host of features and benefits never before seen in our industry. Their next-level performance features effortless operation, and field-tested security that stands up to the harshest weather and use. Meanwhile, the industry’s sleekest aesthetics inspire transformative design, featuring striking panels in solid wood, aluminum, or clad.
The Best-Performing System Ever
We’ve tested our panels over 20,000 operational cycles for decades of performance and built in innovations designed to handle wind, water, extreme temperatures, forced entry, and structural load.
Our Most Streamlined Designs
Besides offering the slimmest frames in the industry, Generation 4 also minimizes exposed hardware by concealing all visible frames to structure attachment points for a more streamlined appearance.
Even More Configuration Flexibility
The panels of our Generation 4 product have the option of moving in stacks of four or six—unattached to the side jamb, and possessing the ability to stack to the left, right or center of the opening.
FourFold and SixFold Panel Sets move and stack to an opening’s left, right, or center—adding more convenience for operators, and enabling widths beyond those of other bi-fold doors. Simultaneously, Floor Supported Technology reduces the need to modify headers on top.
A special multipurpose frame insert enhances aesthetics, by enabling all frame attachment points to be hidden—and provides a space where businesses and residences can conceal cable routing for security and lighting.
By reducing friction, our highly-advanced Gothic Arch Roller System enables panels to be slid open and closed by anyone—smoothly, quickly, and effortlessly.
Four sill options with removable inserts eliminate the concern of high-heeled shoes getting caught in tracks. In addition, our Low Profile Saddle Sills are ADA-compliant (and easier on bare feet).
Our unique width adjustment feature maintains consistent seal compression, while guarding against alignment problems caused by settling.
Generation 4 walls feature the slimmest panels in the industry, with smoother, more streamlined surfaces (enhanced by our patented TwinX structural reinforcement, which helps to eliminate mid-level hinges).
Our exclusive Bionic Turtle® technology provides an insulating thermal break within the frame, adding extra comfort and energy efficiency. It also furnishes a concealed channel that houses locking rods—adding security and enabling slimmer profiles.
In Kirkland, WA, the newly built Mesnick residence showcases the Generation 4 NW Aluminum 640 folding glass wall, which seamlessly connects the living room to the outdoor patio. Selected for its ease of use, accessible swing door, and industry's slimmest aluminum frame, this system maximizes natural light and energy efficiency. Its thermally broken design and floor supported panels transform this homeowner’s space into an open, airy environment.
“My NanaWall was my top wish list item for this house. I love the seamless indoor/outdoor entertaining it enables! Generation 4's slimmer profile offers more window view and is easy to open. It floods our space with natural light and extends our living area to the patio. NanaWall, the originator, has perfected bifold doors; no one does it better.” — Molly Mesnick, Mesnick Homes
The panels of our Generation 4 product have the option of moving in stacks of four or six—unattached to the side jamb, and possessing the ability to stack to the left, right or center of the opening.
From the beginning, we’ve created not just walls, but innovations – opening doors for clients who share our passion for perfection. Now that we’ve taken our walls further than ever before, we can’t wait to see where they lead your design.
By unfolding new possibilities in exteriors and interiors, NanaWall transforms commercial spaces and residences alike—giving you the ability to elevate your next project from imagination to reality.
Any glass wall can show you a horizon. But only Generation 4 lets you explore new ones. Our reinvented systems are filled with features to create new possibilities.
Learn more about the individual products in our Generation 4 family.
NW Aluminum 640
NW Aluminum 640 is a Generation 4 Aluminum Framed Folding Glass Wall. Very narrow-framed, floor supported system for energy-efficient performance.
NW Acoustical 645
NW Acoustical 645 is a Generation 4 Aluminum Framed Folding Glass Wall for superior acoustical buffering that can achieve values up to unit STC 45. Award winning, floor supported interior system.
NW Reinforced 647
NW Reinforced 647 is a Generation 4 Aluminum Framed Folding Glass Wall designed for taller buildings where higher windload requirements are needed. Rated to DP of +/- 70 psf and CW35.
NW Aluminum 840
NW Aluminum 840 is a Generation 4 Aluminum Framed Folding Glass Wall. Designed for taller heights, this very narrow-framed floor supported system also offers superior thermal performance.
NW Reinforced 847
NW Reinforced 847 is a Generation 4 Aluminum Framed Folding Glass Wall designed for taller buildings where higher windload requirements are needed. Rated to DP of +/- 85 psf and CW55.
NW Wood 540
NW Wood 540 is a Generation 4 Wood Framed Folding Glass Wall. Quadruple laminated, cross-grained premium wood, narrow framed floor supported system for energy-efficient performance.
NW Acoustical 545
NW Acoustical 545 is a Generation 4 Wood Framed Folding Glass Wall for superior acoustical buffering that can achieve values up to unit STC 41. Floor supported interior system.
NW Clad 740
NW Clad 740 is a Generation 4 Aluminum Clad Folding Glass Wall. Clip-on cladding technology, solid premium wood core, narrow framed floor supported system for energy-efficient performance.
