When you picture a folding glass door, you probably picture the view: a living room opening onto the patio, an outdoor table within easy reach, or a wall of glass that folds away.
At Lanai, we also think about the frame that makes that opening possible. For our aluminum folding doors and windows, strength is central to the material choice.
Why strength matters in a folding door
A folding door is a moving assembly. Its panels must support glass and work together through hinges, guides, and locking hardware. That makes the frame an important part of both the structure and the experience of using the door.
Strength and stiffness serve related purposes. Strength helps a component resist failure under load; stiffness helps it resist bending. The dimensions and shape of the frame matter alongside the material.
Aluminum offers a useful combination of strength and relatively low weight, and it can be extruded into the detailed shapes used in window and door construction. The NFRC consumer guide identifies strength, durability, and ease of extrusion among aluminum framing’s characteristics.
Strength supports the view
We want the frame to do its job while keeping your attention on what is beyond the glass.
Lanai’s aluminum folding systems pair aluminum construction with narrow sightlines. Those sightlines are the visible frame sections around and between the glass panels. Keeping them slim helps create the open appearance homeowners want, even when the doors are closed.
That combination is why aluminum fits our priorities: a strong framing material and a clean view.
How vinyl compares
Vinyl has advantages of its own. PVC window frames offer good insulating value and moisture resistance, and conventional vinyl surfaces do not require painting. Those qualities explain its place in residential windows. The NFRC guide to nonmetal frames describes these benefits.
For Lanai’s aluminum folding systems, our starting point was strength. We wanted a material suited to the structural demands and frame design of the doors we build.
When comparing a particular aluminum door with a particular vinyl door, look at the complete systems. Panel dimensions, frame construction, hardware, and tested performance give a more useful comparison than the material name alone.
Plan for comfort as well as strength
Aluminum conducts heat readily. A thermal break introduces a less conductive material between the interior and exterior aluminum sections to reduce heat flow. That distinction matters when choosing doors for your climate. Learn how thermal breaks work.
Lanai’s E+ Aluminum range incorporates a thermal break. The appropriate system and glass package depend on your project’s energy requirements.
Why we chose aluminum
Our answer starts where it began: strength.
Aluminum gives us a strong material to design around, with the narrow sightlines that complement a folding glass wall. The frame, glass, hardware, and installation then work together to create the finished opening.
Tell us about your space, the view you want to keep, and how you want your doors to open. Explore Lanai’s systems and start planning your project.