16mm Clear Multiwall Cut To Size

16mm Clear Twinwall Polycarbonate Sheet – UV Stable, Cut to Size

Our 16mm Twinwall Polycarbonate Sheet is one of the most thermally efficient options in our structured polycarbonate range, making it the natural choice for projects where insulation performance is a top priority. The multi-walled cell structure at this thickness significantly reduces heat transfer, helping to maintain comfortable temperatures in conservatories, garden rooms and year-round glazed structures without the weight or fragility of glass.

With a heat transfer coefficient (Ug) of 2.8 W/m²K, the 16mm sheet delivers genuine thermal performance that makes a real difference to running costs and comfort levels in enclosed spaces. Combined with excellent light transmission in the clear variant, it strikes an outstanding balance between warmth and natural daylight.

The UV-stable layer is co-extruded directly into both faces of the sheet — not surface-applied — so it won't peel, flake or degrade over time, ensuring the sheet retains its clarity and structural integrity throughout its service life.

All 16mm sheets are delivered pre-taped as standard. For additional protection, sheets can also be equipped with both aluminium and breather tape at an extra cost — helping to keep the internal channels clear of debris and moisture for the lifetime of the installation.

Compatible with our full range of polycarbonate roofing accessories, including glazing bars, ridge sections, end caps and closure strips — everything needed for a professional, weatherproof finish.

Available as a full sheet at 6000mm x 2100mm, or cut to your exact dimensions at the point of order. Please note a cutting tolerance of +/- 5mm applies to all cut panels. The flutes always run along the length of the sheet.

Key Features

• Made from super strong polycarbonate
• Available in Clear for high light transmission
• Available in Opal or Bronze colours 
• UV Protected Material 
• The sheets are Class 1 fire rated, smooth to handle and deploy
• Excellent Chemical resistance
• Easy to handle and install
• X-Lite Structure: Improved overall mechanical performance
• Energy Saving: Superior thermal insulation for reduced energy costs
• Impact Resistance: Exceptional durability and impact resistance
• Lightweight: Easy to handle and install
• High Light Transmission: Ensures maximum natural light penetration
• UV Resistant: Protects against harmful UV radiation
• Weather Resistant: Maintains performance in various weather conditions
• Fire Performance: High fire performance rating for safety

Applications

• Conservatory and garden room roofing
• Year-round glazed extensions and sunrooms
• Carports and car shelters
• Lean-to and patio canopy roofing
• Covered walkways and pergolas
• Industrial and commercial skylights
• Rooflight and lantern infill panels

Additional Information:

• Thickness Tolerance: The thickness tolerance can vary up to 100% across the sheet due to the manufacturing process.
• Color Variations: Expect variations in color due to the nature of the manufacturing process

Sheet Size: 6000mm x 2100mm (full sheet) — cut to size available Cutting Tolerance: +/- 5mm Flute Direction: Runs along the length of the sheet Accessories: Compatible with our full range of polycarbonate roofing accessories Tape:

Delivered pre-taped — aluminium and breather tape available at additional cost