10mm Polycarbonate Sheet Twinwall - Opal 4000mm x 2100mm
Sheet Size: 4000mm x 2100mm
Sheet Thickness: 10mm
Sheet Colour: Opal
10mm opal twin wall polycarbonate roofing sheets - lightweight, thermally insulating and 200 times stronger than glass. Opal tint diffuses natural light evenly, reducing glare and creating a softer, more comfortable environment beneath. Ideal for pergolas, carports, lean-to roofs and conservatories. Maximum rafter spacing 700mm.
Free Cut to Size Service on ALL Multiwall Polycarbonate Sheets (square and rectangle cuts).
Why Choose 10mm Opal Multiwall Polycarbonate Roofing Sheets?
Our 10mm opal twin wall polycarbonate sheets offer the same outstanding strength and thermal performance as our clear version, with the addition of a light-diffusing opal tint. With 40% light transmission, these sheets reduce glare and soften natural daylight - making them a popular choice for pergolas, carports and conservatories where a more comfortable, shaded environment is preferred. Co-extruded UV protective layer on the outer surface ensures long-lasting performance.
Applications
Pergola and Patio Roofing: The opal tint reduces direct glare while still allowing a good level of natural light through - ideal for covered seating areas and outdoor dining spaces where shade and comfort matter as much as brightness.
Carports and Lean-To Roofs: Provides the same structural performance as the clear version at 700mm maximum rafter spacing, with the added benefit of reduced solar glare on vehicles and stored items below.
Conservatories and Sunrooms: The diffused light effect creates a bright, even interior without harsh direct sunlight - particularly useful in south-facing structures that would otherwise overheat or feel uncomfortable in summer.
Commercial Canopies and Walkways: Opal sheeting gives a clean, uniform appearance from below and reduces the visibility of dirt and debris on the roof surface - a practical choice for public-facing commercial structures.
Prefer maximum light transmission? Our 10mm clear twinwall passes 82% of natural light. For greater insulation or longer spans, see our 16mm triplewall or 25mm 7-wall sheets.
Benefits
Diffused Natural Light: The opal tint scatters light evenly across the space below, eliminating harsh shadows and direct glare while still maintaining a naturally bright environment with 40% light transmission.
Impact Resistance: 200 times stronger than glass and virtually unbreakable under normal conditions - far safer and more practical than glass for roofing applications, including resistance to hail and wind-blown debris.
Thermal Insulation: The hollow twin wall construction provides a natural insulating air gap, reducing heat loss compared to single-skin glazing - particularly beneficial in Ireland's climate.
UV Protection: Co-extruded UV protective layer on the outer surface blocks over 98% of harmful UV rays, preventing yellowing and loss of strength over time. Sheets must always be installed with the UV protected side facing outward.
Lightweight: Far lighter than glass, reducing structural load on the supporting framework and making on-site handling and installation significantly easier.
Installation Note: When fitting 10mm multiwall polycarbonate on a roof, maximum rafter spacing must not exceed 700mm. Always install with the UV protected side facing outward and ribs running vertically or up-slope. Seal the top edge with solid aluminium tape and use a vented U-profile at the bottom edge to allow condensation to drain. Full fitting advice in our multiwall polycarbonate installation guide.
Technical Specifications
| Thickness | 10mm |
| Structure | Twin wall (two layers with internal ribs) |
| Light Transmission | 40% (opal) |
| Impact Resistance | 200 times stronger than glass |
| UV Protection | Co-extruded outer surface |
| U-Value | 3.2 W/m²K |
| Max Rafter Spacing | 700mm |
| Sheet Size (this product) | 4000mm x 2100mm |
| Cut to Size | Free square and rectangle cuts. Custom shapes available via CNC - contact us for a quote. |
Helpful Guides
How to Install Multiwall Polycarbonate Roofing Sheets
How to Cut Multiwall Polycarbonate Sheets
How to Clean Polycarbonate Sheets
Sheet Calculator - Work Out How Many Sheets You Need
Need a Custom Shape Cut? Contact Us for a CNC Quote
Also Available In
6mm Twinwall Polycarbonate | 16mm Triplewall Polycarbonate | 25mm 7-Wall Polycarbonate | View Full Multiwall Range
| Multiwall Colours | Opal |
|---|---|
| Multiwall Thickness | 10mm Thickness |
| Multiwall Sheet Size | 4000mmx2100mm |