This 20mm clear multi-wall polycarbonate hollow sheet features multi-layer vertical rib structure, delivering superior thermal insulation and high rigidity compared with thin twin-wall sheets. One side is equipped with UV protective coating to block ultraviolet rays, preventing yellowing, aging and performance degradation under long-term outdoor exposure. It maintains high light transmittance while offering excellent load-bearing capacity to resist wind and snow loads. Being lightweight and impact-resistant, it is a safe alternative to glass. It can be cut, drilled and cold bent for onsite installation. Double-sided PE protective film safeguards the sheet surface against scratches during transportation and construction. The printed protective film also contains installation, cleaning and thermal expansion instructions for convenient on-site operation.

Shopping mall, exhibition hall and airport large atrium skylight

Botanical garden, commercial greenhouse & agricultural planting roof

Large landscape canopy, swimming pool sun shelter

Factory and warehouse daylighting roofing

High insulation requirement sunroom and glass replacement projects

Q1: What are the benefits of 20mm multi-wall PC sheet vs 10mm twin-wall sheet?

A: Multi-wall structure provides much better thermal insulation, higher stiffness and stronger snow/wind load resistance, perfect for cold regions and large span projects.

Q2: What is the light transmission of this clear 20mm multi-wall sheet?

A: High transparency, light transmittance approx 75%-80%, depending on raw material.

Q3: What maintenance requirements for multi-wall polycarbonate sheet?

A: Clean with soft cloth and mild neutral detergent with warm water, do not use rough brushes, alcohol, kerosene or corrosive chemicals.

Q4: Can you produce colored 20mm multi-wall PC sheets?

A: Clear is standard, milky white, blue, bronze available for bulk orders.

Q5: Is thermal expansion considered during installation?

A: Yes, reserved expansion gap must be left during installation to accommodate thermal expansion and contraction of PC sheet.