Let's talk numbers, not marketing fluff. If you want to know how well a door insulates, you look at the thermal conductivity of the thermal break. Standard polyamide (nylon) has its place, but in the hierarchy of insulation, it's a middle-weight contender. Polyurethane (PUR) pultrusion is the heavyweight champion.
The Barrier That Doesn't Breathe
Aluminum is a fantastic conductor of heat. Without a high-performance break, your door frame is essentially a radiator, pumping summer heat into your living room.
Our PUR pultrusion acts as a dead-stop. Polyurethane has a significantly lower thermal conductivity than polyamide. When we pultrude this resin with glass fibers, we create a barrier that heat simply cannot penetrate. This keeps the interior aluminum skin at room temperature, even when the exterior is baking under a 4 PM desert sun.
Ending the Condensation Crisis
We've all seen it: a beautiful winter morning ruined by "weeping" windows. Condensation occurs when warm, moist interior air hits a cold aluminum surface. Because the PUR core is such a superior insulator, the interior frame stays warm. No cold surface means no condensation, protecting your hardwood floors and drywall from moisture damage.
The Bottom Line
Choosing PUR pultrusion isn't just about comfort; it's about the U-Factor. By optimizing the core, we allow you to specify larger glass packages while still meeting — and exceeding — the most stringent energy codes in the country.