16mm polycarbonate sheet

16mm Polycarbonate Roofing Sheets

Our 16mm polycarbonate roofing sheets are one of the most popular choices for pergolas, lean-to roofs, verandas, carports and garden rooms throughout the UK. Offering an excellent balance of strength, insulation, light transmission and noise reduction, 16mm multiwall polycarbonate is ideal for homeowners and trade professionals looking for a durable, weather-resistant roofing solution.

Available in Clear, Bronze and Opal finishes, our 16mm roofing sheets are lightweight, easy to install and UV protected for long-term performance. Whether you're replacing an existing roof or building a new outdoor structure, 16mm polycarbonate provides improved rigidity and thermal performance compared to thinner sheet options.

For projects requiring bespoke dimensions, we also offer a dedicated 16mm Cut To Size Polycarbonate Sheet service, allowing you to order sheets manufactured to your exact measurements.

Best Uses for 16mm Polycarbonate

16mm is suitable for:

• Pergola roofs

• Lean-to roofs attached to the house

• Verandas and patio canopies

• Carports and shelters

• Garden rooms and outdoor seating areas

• Walkways and covered areas

• Roofing where insulation or noise reduction matters

16mm is not recommended for:

• Conservatories needing high insulation (25mm is better)

• Greenhouses (thinner sheets allow more light)

• Very large spans without support

• Projects requiring high structural strength over long gaps

Why Choose 16mm Polycarbonate

• Stronger and more rigid than 10mm, suitable for most outdoor roofing projects.

• Provides better insulation and noise reduction during rainfall.

• Available in clear, opal and bronze for different lighting and privacy needs.

• Still lightweight and easy to handle compared to glass or solid sheets.

• UV-protected outer layer to prevent yellowing.

• Reliable performance in typical UK weather conditions.

• Excellent all-round solution for DIY users and trade professionals.

Available Options

Your 16mm range may include:

• Clear, Opal and Bronze multiwall sheets

• Lengths such as 2m, 2.5m, 3m, 4m, 5m or 6m

• Standard multiwall sheet widths

• Aluminium or PVC glazing bars

• End caps, closure caps and breather tape

• Roof-specific fixings

Installation Advice

To install 16mm polycarbonate correctly:

• Use appropriate glazing bars for full support and weatherproofing.

• Tape and cap the open ends of the sheet before installation.

• Allow room for thermal expansion to prevent warping.

• Ensure the UV-protected side faces outward.

• Follow manufacturer span recommendations to prevent sagging on larger projects.

• Use suitable fixings and avoid overtightening.

Common Mistakes to Avoid

• Using 16mm without glazing bars, which leads to leaks or sheet movement.

• Overtightening screws and restricting expansion.

• Leaving open ends unsealed, allowing moisture or debris into the chambers.

• Attempting very long unsupported spans where a thicker sheet or more rafters are required.

• Choosing the wrong colour for the project (e.g., clear in a south-facing area may lead to too much glare).

Compare Alternative Thicknesses

If your project requires a different level of insulation, strength or light transmission, you may wish to consider one of our alternative polycarbonate sheet thicknesses.

10mm Polycarbonate Sheets

A cost-effective option for carports, canopies, shelters and smaller roofing projects where affordability and lightweight installation are priorities.

25mm Polycarbonate Sheets

Ideal for conservatories, premium garden rooms and year-round outdoor spaces where maximum insulation and thermal performance are required.

Need a Custom Size?

If your project requires bespoke dimensions, view our 16mm Cut To Size Polycarbonate Sheet service and order sheets manufactured to your exact measurements.

Why Buy from PolycarbonateX

• UK specialist supplier with dedicated product knowledge.

• Fast, protective delivery for multiwall roofing sheets.

• Free replacement if any sheets arrive damaged.

• Clear installation guides supporting DIY and trade users.

• Friendly support available for project advice by phone or email.

Need Help Choosing?

If you are unsure whether 16mm is right for your structure:

• Use the thickness selector on the category page.

• Contact us for guidance.

• Send a photo of your project for personalised recommendations.