Multiwall Polycarbonate Roofing Sheets
Lightweight, impact-resistant polycarbonate sheets for roofs, pergolas, greenhouses & canopies. Class 1 fire-rated, UV-protected & built for Irish weather. Available in clear, opal & bronze.
Why Choose Multiwall Polycarbonate?
✓ 250x stronger than glass | ✓ Superior thermal insulation | ✓ Class 1 fire-rated | ✓ 10–15 year lifespan | ✓ 80%+ light transmission
What Is Multiwall Polycarbonate?
Multiwall polycarbonate sheets feature multiple layers with hollow chambers between them, creating a lightweight yet incredibly durable glazing material. The hollow structure provides excellent insulation properties while maintaining transparency and light diffusion. Each sheet is co-extruded with a UV-absorption layer on the outer surface to protect against yellowing and UV degradation.
Typical applications include pergola roofs, lean-tos, greenhouses, car ports, canopies, smoking shelters, and commercial skylights. The sheets are easy to cut with a stanley knife or jigsaw, making them ideal for custom projects of any size.
Available Thicknesses & Colours
Thicknesses: We stock 6mm, 10mm, 16mm, and 25mm multiwall polycarbonate — choose based on your application:
- 6mm: Side entrances and smaller enclosed areas
- 10mm: Pergolas, lean-tos and general roofing projects
- 16mm: Roofing projects requiring greater insulation
- 25mm: Larger projects requiring maximum strength and insulation
Colours:
- Clear: Maximum light transmission (80%+), ideal for greenhouses and conservatories
- Opal: Diffuse light with soft appearance, popular for pergolas and patios
- Bronze: Tinted finish that reduces glare, perfect for car ports and outdoor shelters
Need help choosing? Use our instant roof calculator to get a custom quote, or call 01 8010022 for expert advice.
Multiwall Polycarbonate
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10mm Polycarbonate Sheet Twinwall - Bronze 5000mm x 1050mm
€108.60 excl. VATSheet Size: 5000mm x 1050mm
Sheet Thickness: 10mm
Sheet Colour: Bronze10mm bronze twin wall polycarbonate roofing sheets - lightweight, thermally insulating and 200 times stronger than glass. The bronze tint reduces light transmission to 20%, providing excellent shade and privacy beneath while retaining the full structural performance of the twinwall range. Ideal for pergolas, carports and lean-to roofs. Maximum rafter spacing 700mm.
Free Cut to Size Service on ALL Multiwall Polycarbonate Sheets (square and rectangle cuts).
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25mm Polycarbonate Sheet 7X Wall - Bronze 5000mm x 1050mm
€180.10 excl. VATSheet Size: 5000mm x 1050mm
Sheet Thickness: 25mm
Sheet Colour: Bronze25mm bronze 7X wall polycarbonate roofing sheets — lightweight and 200 times stronger than glass, combining the best thermal insulation in our standard multiwall range with maximum solar control. The premium choice for south-facing conservatories, canopy roofs and carports where keeping heat out in summer is just as important as retaining it in winter. 11% light transmission and a 1.60 W/m²K U-value. Maximum rafter spacing 1250mm.
Free cut to size service on all multiwall polycarbonate sheets (square and rectangle cuts).
Multiwall vs. Solid Polycarbonate vs. Perspex
| Feature | Multiwall PC | Solid PC | Perspex/Acrylic |
|---|---|---|---|
| Impact Resistance | 250x glass ⭐⭐⭐⭐⭐ | 250x glass ⭐⭐⭐⭐ | 10x glass ⭐⭐ |
| Thermal Insulation | Best (hollow chambers) | Good (solid) | Poor (single layer) |
| Cost | €€ (excellent value) | €€€ (premium) | € (budget) |
| Durability | 10–15 years | 15–20 years | 5–10 years |
| Best For | Pergolas, Lean-tos, Greenhouses | Architectural glazing | Indoor partitions |
Why Choose Multiwall Polycarbonate?
Impact Resistant
200 times stronger than glass. Excellent protection against hailstones, vandalism & accidental damage—ideal for Irish weather.
Fire Resistant
Class 1 fire-rated (EN 13823). Independently tested & certified. Safe for residential & commercial use.
⏱ Long-Lasting
Resistant to yellowing, cracking & UV degradation. 10–15 year lifespan with minimal maintenance.
Light Transmission
80%+ light penetration with diffused glow. Minimizes glare while maintaining brightness.
Thermal Insulation
Hollow chambers provide superior insulation. Reduce heating/cooling costs while maintaining comfort.
Lightweight & Easy
Significantly lighter than glass or solid sheets. Easy to cut, drill & install with standard tools.
Popular Applications
Pergolas & Lean-Tos
Weather-resistant outdoor spaces with natural light. Perfect for Irish gardens. Ideal thickness: 10mm.
Greenhouses
Optimal growing environment with 80%+ light transmission and thermal insulation. Thicknesses: 6–10mm.
Car Ports
Impact-resistant roofing for covered parking. Withstands wind, hail & debris. Thicknesses: 8–10mm.
Smoking Shelters
Weatherproof, easy-to-clean covered areas. Class 1 fire-rated. Ideal thickness: 10mm.
Commercial Glazing
Interior partitions, skylights & architectural elements. Cost-effective alternative to glass.
Skylights
Durable, light-transmitting roof openings. Thicker profiles (10–16mm) handle larger spans.
Specifications & Available Options
Thicknesses Available
6mm (side entrances & smaller areas) | 10mm (pergolas, lean-tos & general roofing) | 16mm (additional insulation for greenhouses) | 25mm (larger projects)
Colours & Properties
Clear: Maximum light (80%+) for greenhouses | Opal: Diffuse light, soft appearance | Bronze: Tinted, reduces glare for car ports & patios
Key Features
✓ Fire Rating: Class 1 (EN 13823) | ✓ UV Protection: Co-extruded layer | ✓ Temperature Range: –40°C to +120°C | ✓ Lifespan: 10–15 years | ✓ Hail Tested: Certified for Irish weather
How to Choose the Right Thickness
Pergolas & Garden Structures
Recommended: 10mm — Provides insulation, light diffusion & wind resistance. Lightweight installation.
Greenhouses & Growing
Recommended: 6–10mm — Thicker sheets (8–10mm) retain winter warmth. Clear or opal for light transmission.
Car Ports & High-Impact Areas
Recommended: 8–10mm — Better impact & wind load resistance. Bronze colour reduces headlight glare.
Skylights & Large Spans
Recommended: 10–16mm — Structural rigidity for unsupported spans. Handles snow & concentrated loads.
Installation & Support
Multiwall polycarbonate is easy to install with standard tools:
- Cutting: Jigsaw or handsaw (avoid high-speed circular saws)
- Drilling: Standard drill bits; pre-drill for large fixings
- Expansion: Allow thermal movement (~1mm per meter). Don't over-tighten fixings
- Sealing: Use butyl tape or silicone sealant to prevent condensation
- Ventilation: Ensure cavity is vented to prevent moisture buildup
Full Installation Guide: Download our step-by-step installation guide
Technical Help: Call 01 8010022 or email [email protected]
Cleaning & Maintenance
Regular Care: Wash with soft cloth & mild soap in lukewarm water. Avoid abrasive cleaners & pressure washers. Clean 2–4 times yearly.
Annual Inspection: Check for cracks, inspect seals & fixings, clear debris from channels, reapply sealant if needed.
See our complete cleaning guide →
Frequently Asked Questions
What's the difference between 6mm, 10mm, 16mm and 25mm multiwall?
We stock 6mm for side entrances and smaller areas, 10mm for pergolas and lean-tos, 16mm for greenhouses requiring additional insulation, and 25mm for larger projects.
How long does multiwall polycarbonate last?
With proper installation & annual maintenance, 10–15 years. The UV layer protects against yellowing.
Can you cut multiwall sheets on-site?
Yes. Easy to cut with jigsaw, handsaw or circular saw. We recommend pre-cutting for custom sizes—contact [email protected].
What thickness should I use for a pergola roof?
Recommended: 10mm multiwall. Ideal for pergolas and lean-tos with good durability and light transmission.
Is multiwall polycarbonate safe for greenhouses?
Excellent choice. 80%+ light transmission, thermal insulation for temperature control & shatter-resistant. Use 6–10mm.
How do you prevent condensation in roofs?
Use butyl tape or silicone sealant when installing. Ensure cavity ventilation. Never fully seal end caps.
Can multiwall polycarbonate be recycled?
Yes. Polycarbonate is recyclable through standard #7 plastic programs. Contact your local authority for options.
What's the warranty?
Contact [email protected] for specific warranty details. All sheets are covered against manufacturing defects.