25mm Five-Wall Polycarbonate Roofing Sheets (Clear)

Our 25mm five wall polycarbonate roofing sheets provide a high-performance solution for roofing projects that require maximum strength, insulation and durability. Designed with a multi-layer internal structure, these sheets are ideal for conservatories, large canopies and high-spec roofing applications.

These clear polycarbonate roofing sheets allow excellent natural light transmission while offering significantly improved thermal performance compared to thinner sheets. The five wall construction creates multiple internal air chambers, helping to reduce heat loss and improve energy efficiency. :contentReference[oaicite:0]{index=0}

Five Wall Construction – Maximum Strength and Insulation

25mm polycarbonate sheets use a five wall multiwall structure, providing superior rigidity and insulation compared to twinwall and triple wall sheets. The internal layers form a reinforced design that increases strength while maintaining a lightweight structure.

• Superior insulation compared to 10mm and 16mm sheets
• High load-bearing strength for wider spans
• Excellent thermal efficiency
• Lightweight yet highly impact-resistant

This makes 25mm sheets ideal for roofing projects where performance and durability are critical. :contentReference[oaicite:1]{index=1}

Why Choose 25mm Polycarbonate Roofing Sheets?

• High insulation for year-round comfort
• Strong multiwall structure for durability
• Excellent light transmission
• UV-protected surface to prevent discolouration
• Suitable for large spans and structural applications

Polycarbonate sheets are up to 200 times stronger than glass while remaining significantly lighter, making them a practical and safe roofing material. :contentReference[oaicite:2]{index=2}

Common Applications

25mm polycarbonate sheets are commonly used for:

• Conservatory roofs and replacements
• Large pergolas and patio covers
• Carports and covered walkways
• Commercial and industrial roofing

They are particularly suited to larger structures where improved insulation and strength are required.

Span and Performance

Due to their strength, 25mm sheets allow for wider rafter spacing compared to thinner sheets. Typical spans can reach around 1650mm or more depending on installation conditions, making them ideal for larger roof areas. :contentReference[oaicite:3]{index=3}

This reduces the need for additional structural support and helps create cleaner roof designs.

Light Transmission and Clarity

Clear 25mm polycarbonate sheets allow high levels of natural light to pass through while diffusing direct sunlight. This creates bright, usable spaces without excessive glare or heat build-up.

If reduced light or heat is required, alternative finishes such as bronze or opal may be considered.

Sheet Sizes and Installation

25mm polycarbonate sheets are typically available in widths up to 2100mm and various lengths to suit your project. They must be installed using appropriate glazing bars and sealed with tape to protect the internal flutes.

Allow for expansion during installation, typically around 4mm on edges, to ensure long-term performance. :contentReference[oaicite:4]{index=4}

Trade and DIY Supply

We supply 25mm polycarbonate roofing sheets to both trade professionals and DIY customers. Whether you are installing a new conservatory roof or upgrading an existing structure, our sheets are designed for long-term performance and ease of installation.

Based in Bristol, Master Plastics supplies customers locally and across the UK, offering reliable access to high-quality roofing materials.

25mm Polycarbonate FAQs

Is 25mm polycarbonate suitable for conservatories?

Yes, 25mm sheets are one of the best options for conservatory roofs due to their excellent insulation and strength.

What is the difference between 16mm and 25mm sheets?

25mm sheets provide significantly better insulation and allow wider spans, making them more suitable for larger structures.

Do clear sheets block UV?

Yes, polycarbonate sheets include a UV-protected layer that helps prevent damage and extends lifespan.

Browse our range of 25mm five wall polycarbonate roofing sheets below to find the right size for your project.