Thermoplastic Polyurethane: Why TPU Excels on the Roof
The choice of material determines the longevity of a roof penetration. While many manufacturers rely on EPDM, lead, or rigid plastics, TPU (Thermoplastic Polyurethane) has established itself as a superior alternative. But what makes this material so special?
What is TPU?
TPU belongs to the family of thermoplastic elastomers. It combines the elasticity of rubber with the processability of thermoplastics. The material can be processed in 3D printing while maintaining its excellent mechanical properties.
Properties in Comparison
| Property | TPU | EPDM | Lead |
|---|---|---|---|
| UV Resistance | Very High | Medium | High |
| Elasticity | Permanent | Degrading | None |
| Weight | Low | Low | High |
| Environmental Compatibility | High | Medium | Low |
| Temperature Range | -40 to +120 °C | -40 to +80 °C | Limited |
| Suitable for 3D Printing | Yes | No | No |
Advantages for Roof Penetrations
- Permanent Elasticity: TPU remains elastic and adapts to the tile contour, even after years.
- No Material Fatigue: Unlike EPDM, TPU does not harden due to UV exposure.
- Environmentally Friendly: In contrast to lead penetrations, TPU is free of heavy metals.
- Lightweight: Easy handling on the roof, no unnecessary additional weight.
3D Printing: Manufacturing of the Future
NEXCAPE relies on additive manufacturing in Germany. 3D printing allows for precise geometries that would not be economically feasible with injection molding. Each penetration is manufactured so that the cable openings are optimally dimensioned, from the 2-PV variant to the 6 PV+PE.
Available Configurations
The penetrations are available in 2 PV, 2 PV+PE, 4 PV, 4 PV+PE, 6 PV, and 6 PV+PE variants. The PE variants offer an additional opening for the grounding cable. All variants are available in 105 mm, 125 mm, and 150 mm lengths.
Experience TPU quality Made in Germany: Roof penetrations for solar cables (105/125/150 mm)
