The Corotherm Opal 16mm Triplewall Polycarbonate Sheet from Ariel Plastics is a practical and high-performance option for a wide range of roofing and glazing needs. It combines strength and lightweight handling with excellent insulation properties, making it ideal for conservatories, carports, porches, and more.
Its subtle opal finish offers a softer, diffused light transmission while still providing reliable protection against the elements. Whether you're looking to reduce glare or add privacy, the opal option is both stylish and functional. These sheets are available in full sizes or can be cut to your specifications, and every sheet is backed by a reassuring 10-year manufacturer’s warranty.
Key Features
Available in clear, bronze, and opal finishes
Lightweight yet tough and impact-resistant
UV-protected for longer life and colour stability
Helps reduce condensation build-up
Low maintenance with a self-cleaning surface
Covered by a 10-year manufacturer’s warranty
Perfect For
This product is a great choice for:
Porches
Canopies
Carports
Conservatories
Lean-to roofs
Vertical glazing or cladding projects
Its versatility and performance make it suitable for both residential and light commercial applications.
Installation Guidelines
Before installation, always check that the UV-protected side of the sheet is facing outwards—this is clearly labelled by the manufacturer. This ensures the sheet remains protected from sun damage over time.
To allow rainwater to drain efficiently, the roof must be pitched at a minimum of 10°. The sheet’s internal flutes should run vertically, from the top to the bottom of the slope—never sideways—as this supports structural strength and ensures proper drainage.
Please note: sheets cannot be joined vertically. For best results, use low modulus neutral cure sealants and cross-linked butyl flashing tape for sealing.
Cutting and Shaping
Working with Corotherm sheets is straightforward. For cuts that run along the flutes, use a sharp utility knife. If you’re cutting across the flutes, a fine-toothed saw works best. For more intricate curved shapes, a fine-toothed jigsaw will give you clean results without splintering or cracking.
Thermal Expansion
Polycarbonate naturally expands and contracts with temperature changes, so it’s essential to account for this during installation. Leave a small gap at the top of each sheet, and when drilling, make the holes at least 3mm larger than the fixings to allow for movement.
Avoid clamping the sheets too tightly or overtightening fixings, as this may cause stress and cracking over time.
Cleaning and Maintenance
Keeping your sheet clean is simple and low effort. Use lukewarm, soapy water and a soft cloth or sponge to gently wipe away dirt or debris. Avoid abrasive products, rough brushes, and highly alkaline cleaning agents, as these can damage the surface.
The sheet’s UV protection also helps repel dirt, meaning you won’t need to clean it as frequently compared to other materials.
10-Year Warranty
Every Corotherm 16mm Triplewall sheet comes with a 10-year manufacturer’s warranty covering faults due to manufacturing defects under normal weather conditions.
Please remember that the warranty is only valid if the product is installed and maintained according to the official instructions. The warranty does not cover costs for reinstallation or damage resulting from incorrect installation.
Frequently Asked Questions
1. What makes the opal finish different from the clear or bronze versions?
The opal finish provides a **softer, diffused light**, reducing glare while still allowing natural light to pass through. It’s ideal for areas where privacy or softer lighting is desired, such as conservatories or sheltered walkways.
2. Can I cut the sheets myself, and what tools should I use?
Yes, you can easily cut the sheets at home. Use a **sharp utility knife** for cuts along the flutes and a **fine-toothed saw or jigsaw** for cross cuts or curves. Always wear protective gear when cutting and secure the sheet to prevent slipping.
3. How do I make sure the warranty stays valid?
To keep your warranty valid, follow all installation instructions provided by Ariel Plastics. Use the correct sealants and flashing materials, install with the UV side facing out, and maintain the sheet with gentle cleaning methods only—no abrasive products or high-pressure tools.
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