Polycarbonate sheets are widely used for pergolas, canopies, garden rooms, walkways, and similar outdoor structures. Alongside thickness, the finish of the sheet plays an important role in how much light passes through, how bright the covered area feels, and how the roof appears from below.

This guide explains the differences between clear, opal, and bronze multiwall polycarbonate sheets, along with typical uses for each finish.
You can browse all finishes here:
👉 https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets

Why Polycarbonate Sheet Finish Matters

Different roofed areas require different levels of light, shading, and visibility. For example:

• Pergolas and patio covers

• Garden rooms

• Conservatory-style roofs

• Carports and canopies

• Lean-to structures

• Covered walkways

Each installation may benefit from either high light levels, diffused lighting, or a more shaded appearance. Selecting an appropriate finish helps match the sheet to the intended use.

Clear Polycarbonate Sheets

Overview

Clear polycarbonate sheets allow high levels of natural daylight to pass through, creating a bright environment beneath the roof.

Example product:
https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets/products/10mm-corotherm-multiwall-polycarbonate-roofing-sheet-clear

Typical Characteristics

• Bright, open appearance

• High light transmission

• Suitable where clear visibility is preferred

Common Uses

Clear finishes are often chosen for:

• Greenhouses and cold frames

• Walkways

• Areas that would otherwise receive limited natural light

Things to Consider

Clear sheets provide the highest brightness. In locations with strong sun exposure, a tinted or diffused option may offer a different lighting effect.

Opal Polycarbonate Sheets

Overview

Opal polycarbonate (also known as translucent white) diffuses incoming light to produce a softer, more even illumination beneath the sheet.

Example product:
https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets/products/16mm-corotherm-multiwall-polycarbonate-roofing-sheet-opal

Typical Characteristics

• Diffused, reduced-glare lighting

• Increased privacy from above

• Softer overall brightness compared to clear sheets

Common Uses

Opal sheets are often selected for:

• Patio covers

• Garden rooms

• South-facing roofs

• Areas where consistent lighting is preferred

Things to Consider

Opal finishes allow plenty of daylight while reducing direct glare, which can be helpful for spaces used for seating or relaxation.

Bronze Polycarbonate Sheets

Overview

Bronze polycarbonate sheets feature a tinted finish that provides a darker, shaded appearance.

Example product:
https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets/products/10mm-corotherm-multiwall-polycarbonate-roofing-sheet-bronze

Typical Characteristics

• Lower light levels compared to clear or opal

• A more shaded environment beneath the roof

• Distinctive tinted appearance

Common Uses

Bronze sheets are typically used for:

• Patio covers in sunny locations

• Carports

• Canopies with strong afternoon sun

• Outdoor seating areas

Things to Consider

Bronze reduces more light than clear or opal. It may be suitable for roofs where a shaded effect is preferred.

Side-by-Side Overview

What About Heatguard Polycarbonate?

Some sheet types, such as Heatguard Opal, are designed with a specialist coating that reflects a portion of solar energy. These sheets are often used in installations where moderated lighting is desirable.

Example:
https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets/products/25mm-corotherm-multiwall-polycarbonate-roofing-sheet-heatguard-opal

Heatguard finishes are commonly selected for larger or enclosed structures such as conservatory-style roofs or garden rooms.

Do All Finishes Offer the Same Core Features?

Clear, opal, and bronze multiwall polycarbonate sheets are all manufactured with:

• A UV-protected outer face

• Multiwall structure

• Lightweight handling characteristics

• Similar general installation requirements

The differences relate mainly to light levels, diffusion, and the appearance of the finished roof.

Selecting the Right Finish

You may find the following general guidance helpful:

Choose Clear if:

• High daylight levels are preferred

• Visibility through the sheet is important

Choose Opal if:

• You want diffused lighting below the roof

• You want to reduce glare

• You prefer additional privacy from above

Choose Bronze if:

• You prefer a more shaded environment

• Your structure is in a bright, sunny orientation

• A tinted appearance suits the project design

Browse Polycarbonate Sheets by Finish

You can explore all finishes and thicknesses here:
👉 https://polycarbonatex.co.uk/collections/multiwall-polycarbonate-sheets

Accessories for installation can be found here:
👉 https://polycarbonatex.co.uk/collections/multiwall-accessories