25mm Multiwall Polycarbonate Sheets – Heavy-Duty Glazing for Larger Projects
25mm multiwall polycarbonate represents the premium choice for the most demanding glazing applications. With 13 internal walls and the deepest hollow-chamber design, 25mm sheets deliver maximum structural strength, thermal insulation, and durability for large-scale industrial, agricultural, and architectural projects.
Engineered for extreme performance, 25mm multiwall polycarbonate is ideal for applications where nothing but premium performance will suffice. Available in clear, opal, and bronze finishes, with UV-protected co-extruded layers and Class 1 fire rating. The material offers 250x impact resistance vs. glass and 80%+ light transmission. 25mm sheets support unsupported spans exceeding 6 meters and can be easily cut with standard tools (stanley knife or jigsaw).
Typical Applications: Large-scale agricultural production facilities, major industrial transparent roofing systems, high-end architectural installations requiring premium durability, large commercial canopies with extended unsupported spans (6+ meters), research facility greenhouses, and applications with extreme climate demands. For standard roofing projects, see our 16mm thickness. For smaller projects, see our 10mm thickness.
Get an Instant Quote for Your Project
Use our multiwall polycarbonate roof calculator to design your project and receive an instant quote. Select your roof type, enter your dimensions, and get a complete quote for all 25mm sheets and accessories needed. For large-scale or specialized projects, call us on 01 8010022 or email [email protected] for expert consultation and engineering support.
For technical information, installation guides, and performance specifications, visit our How To Multiwall Roofing Guide
25mm Multiwall Polycarbonate
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25mm Polycarbonate Sheet 7X Wall - Bronze 3500mm x 1050mm
€132.40 excl. VATSheet Size: 3500mm 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).
Benefits of 25mm Multiwall Polycarbonate Sheets
Maximum Impact Resistance
250x stronger than glass. Ultimate protection against hailstones, vandalism & accidental damage—suitable for extreme exposure conditions.
Ultimate Structural Strength
Thickest available profile supports unsupported spans exceeding 6 meters. Handles extreme wind, snow, and dead loads without intermediate supports.
Premium Thermal Insulation
7-wall structure (7X Wall) with deep hollow chambers provides maximum insulation. Superior temperature control for climate-critical facilities and year-round growing operations.
Fire Resistance
Class 1 fire-rated (EN 13823). Independently tested & certified for safety in demanding residential, commercial, and industrial applications.
Premium Light Transmission
80%+ light penetration with exceptional clarity. Provides bright, evenly diffused light without harsh glare or significant shadow areas.
Lightweight & Easy Installation
Despite maximum strength, 25mm remains significantly lighter than glass or solid materials. Can be cut with stanley knife or jigsaw—standard tools only.
25mm vs. 16mm vs. 10mm: Thickness Comparison
10mm
Structural: Good
Insulation: Better
Cost: Mid-range
Max Span: 3–4m
Best For: Pergolas & Lean-tos
16mm
Structural: Excellent
Insulation: Maximum
Cost: Premium
Max Span: 4+ m
Best For: Large Roofing
25mm
Structural: Maximum
Insulation: Maximum
Cost: Very Premium
Max Span: 6+ m
Best For: Heavy Duty
25mm Multiwall Polycarbonate Specifications
Material: Co-extruded polycarbonate with UV protection layer
Fire Rating: Class 1 surface spread of flame (EN 13823)
Impact Resistance: 250x stronger than glass
Light Transmission: 80%+
Wall Structure: Multi-wall with 7 internal walls (7X Wall structure) with deep hollow chambers
Available Colours: Clear (transparent), Opal (translucent white/cream), Bronze (tinted, reduces glare)
Thermal Insulation: Premium insulation with maximum heat retention; superior vs. 16mm and all thinner profiles
Durability: 10-15 years with normal maintenance and UV protection
Maximum Unsupported Span: 6+ meters (depending on extreme load requirements)
Installation: Easy to cut and install with standard tools (stanley knife, jigsaw)
When to Choose 25mm Multiwall Polycarbonate
Choose 25mm for specialized heavy-duty applications where maximum strength and insulation are essential:
• Large agricultural production facilities requiring climate control
• Major industrial transparent roofing systems
• Extreme unsupported spans (6+ meters)
• Applications with extreme snow or wind loading
• Research facility greenhouses with critical climate requirements
• Premium architectural installations requiring maximum durability
• Applications where energy efficiency and longevity are paramount
Compare with other thicknesses: Our 16mm multiwall polycarbonate is ideal for most large roofing projects. For standard pergolas and lean-tos, see our 10mm thickness. For smaller glazing areas, see our 6mm thickness.
Frequently Asked Questions
What maximum span can 25mm multiwall polycarbonate support?
25mm can support unsupported spans exceeding 6 meters, depending on specific load requirements (wind, snow, dead loads). This makes it ideal for large industrial and agricultural applications without intermediate support structures. For engineering specifications, contact us at 01 8010022.
Is 25mm multiwall polycarbonate better than 16mm?
For extreme applications with larger unsupported spans (6+ meters) or exceptional climate control needs, yes. 25mm offers superior structural strength and thermal insulation vs. 16mm. However, 16mm is adequate for most large roofing projects and offers better value. 25mm is typically reserved for specialized industrial or agricultural facilities.
What colours are available for 25mm multiwall polycarbonate?
25mm multiwall polycarbonate is available in three colours: Clear (transparent, maximum light transmission), Opal (translucent white/cream, diffuses light & provides privacy), and Bronze (tinted finish that reduces glare, ideal for car ports and patios).
Can 25mm multiwall polycarbonate be cut on-site?
Yes. 25mm sheets are easy to cut with a stanley knife or jigsaw. Standard tools only—no specialized equipment needed. We recommend pre-cutting for larger custom sizes to minimize waste and ensure accurate fits.
How long do 25mm multiwall polycarbonate sheets last?
With proper installation and basic maintenance (annual cleaning and seal inspection), 25mm multiwall polycarbonate lasts 10-15 years. The UV-protection layer maintains clarity and structural integrity throughout its lifespan, making it a premium long-term investment.
When should I choose 25mm over 16mm?
Choose 25mm when you need the largest unsupported spans (6+ meters), exceptional structural strength for extreme conditions, maximum thermal insulation for climate-critical facilities, or a premium finish for specialized industrial applications. For most large roofing projects, 16mm offers excellent performance at better value.
Product Guides & Resources
25mm multiwall polycarbonate is the ultimate choice for demanding applications where maximum strength, insulation, and durability are non-negotiable. These unique qualities, combined with extended UV protection and deep hollow-chamber insulation, make 25mm the gold standard for large-scale industrial, agricultural, and specialized architectural applications.
Our full range of multiwall polycarbonate sheets includes 6mm, 10mm, 16mm, and 25mm thicknesses. For more information and installation guidance, visit our How To Multiwall Roofing Guide.