The Corotherm 16mm Triplewall sheet is a strong yet lightweight polycarbonate solution ideal for roofing and vertical glazing projects. Designed for excellent durability and insulation, this triplewall sheet comes in clear, bronze, and opal finishes to suit a variety of styles and applications. Whether you're building a conservatory, carport, or porch, this versatile sheet offers reliable weather protection and light diffusion. It is available in full sheets or can be cut to size, and comes with a 10-year warranty for peace of mind.
Key Features
Available in clear, bronze, and opal finishes
Lightweight and impact-resistant
UV-protected for long-term performance
Helps minimise condensation
Self-cleaning surface with low maintenance
Covered by a 10-year manufacturer’s warranty
Perfect For
Porches
Canopies
Carports
Conservatories
Lean-to roofs
Vertical glazing and cladding projects
Installation Guidelines
Before installation, be sure the UV-protected side (clearly marked) is facing outward to protect the sheet from sun damage. For proper drainage, the roof should be pitched at a minimum slope of 10°. The sheet's flutes must run vertically from the top to the bottom of the slope—never side to side—as this ensures correct drainage and structural integrity. Sheets cannot be joined vertically from top to bottom.
Only use low modulus neutral cure sealant and cross-linked butyl flashing tape to ensure weather resistance and longevity.
Cutting and Shaping
Corotherm 16mm Triplewall sheets are simple to cut and won’t crack or shatter. For cuts parallel to the flutes, a sharp utility knife works well. For cross cuts, use a fine-toothed saw, and if you're working with curves, a fine-toothed jigsaw is the most suitable tool for the job.
Thermal Expansion
As with all polycarbonate materials, thermal expansion must be accounted for during installation. Leave adequate gaps at the top of the sheet, and when drilling fixing holes, allow at least 3mm around each hole for movement. Do not clamp or overtighten the sheets—this will restrict thermal movement and can lead to damage.
Cleaning and Maintenance
Cleaning your Corotherm sheet is easy. Simply use lukewarm soapy water and a soft sponge or cloth. Avoid abrasive cleaners, brushes, or high-alkaline solutions as they can scratch or damage the sheet. The UV-protected surface also helps keep the sheet cleaner for longer, reducing maintenance needs.
10-Year Warranty
Corotherm 16mm Triplewall comes with a 10-year warranty against manufacturing defects under normal weather conditions. If a fault develops due to a manufacturing issue within this timeframe, a replacement will be provided free of charge. However, the warranty is only valid if the product is installed and maintained according to the manufacturer’s instructions. It does not cover reinstallation costs or consequential damage.
Frequently Asked Questions
1. Is the 16mm Triplewall Corotherm suitable for roofing?
Yes, this product is specifically designed for roofing as well as vertical glazing. It’s ideal for porches, conservatories, carports, and similar structures thanks to its strength and insulation properties.
2. How should the sheet be installed to allow proper water drainage?
Make sure the sheet is installed at a roof pitch of at least 10°, with the flutes running vertically from top to bottom. This ensures effective water runoff and structural integrity.
3. How do I maintain the sheet to ensure the warranty remains valid?
To maintain warranty coverage, install the sheet according to the manufacturer’s instructions using only the recommended sealants and fixings. Also, ensure proper cleaning methods are followed—avoid abrasive cleaners and always use soft cloths or sponges.
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