In the pursuit of "structural transparency," the architect's greatest enemy is deflection. We dream of vast, uninterrupted spans of glass that dissolve the boundary between the sanctuary of the home and the spirit of the landscape. But glass is heavy, and wind is a physical force. To achieve these massive scales without the visual clutter of thick, clunky frames, the "skeleton" of the door must be exceptionally rigid.
The Composite Advantage
Unlike the hollow or lightweight plastic inserts used in mass-market systems, our PUR core is a high-density, fiber-reinforced composite. The pultrusion process aligns glass fibers in a continuous longitudinal orientation, creating a material with a strength-to-weight ratio that rivals structural steel.
For the designer, this translates to unmatched verticality. While other systems require mid-rail supports or bulkier profiles once you exceed an eight-foot height, FlowDoors maintains its slim, elegant profile at heights that truly capture the volume of a room.
Deflecting the Gale
A sliding door is more than a wall; it is a sail. In coastal environments or high-elevation sites, wind loads can exert thousands of pounds of pressure against the glass.
- The Stiff Core: Because the PUR core is inherently stiffer than polyamide, it resists flexing under pressure.
- Precision Anchoring: High-density polyurethane provides a superior substrate for hardware. Hinges and locking points are anchored into a solid, composite spine rather than a thin thermal strip, ensuring that even the largest panels remain perfectly plumb.
By utilizing PUR pultrusion, we aren't just building a door; we are reinforcing the home's envelope, allowing for a bolder, more ambitious architectural footprint.