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Marlon 25mm Heatguard Opal Sevenwall Polycarbonate Roof Sheets

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£46.82 Incl. VAT
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Corotherm multiwall polycarbonate is the light weight, impact resistant, insulating glazing sheet from Ariel Plastics. Suitable for a wide range of roofing and glazing applications around the home and garden including canopies, veranda covers, carports and greenhouses, Corotherm sheets are available in clear for maximum daylight and a range of solar controlling tints. Full sheets can be purchased from the range of standard sheet sizes or the Cut to Size service allows customers to order to their exact size requirements. Corotherm sheets are easy to cut, handle and install and carry a 10 year warranty.

Multiwall polycarbonate

We offer a wide range of multiwall polycarbonate glazing sheet and accessories for roofing and glazing applications around the home and garden. Whether you are installing a canopy, carport or replacement roof glazing, we have the perfect solution for your project. Choose from the range of standard sized multiwall polycarbonate glazing sheets or use the cut to size service to order to your exact size requirements. For a complete roof pack service choose from the ready to install self supporting roof system or order multiwall polycarbonate installation accessories for your timber supported roofing system.


• High impact resistance : up to 200 times greater than glass.
• Excellent protection : against hailstones, vandalism and accidental damage.
• Insulating glazing : which can achieve a sheet uValue of 1.6 W/m²K.
• Externally : silver grey in colour.
• Internally : opal surface.
• Creates : a soft light quality.
• Reduces : heat build up by up to 50% compared to clear material.
• Prevents : the conservatory from overheating in hot weather.
• Eliminates : the need for blinds.
• Light transmission : 7% which blends with dark coloured conservatories.
• High strength : weight ratio.
• Cost effective : as sheet weight is low, support structures can be lighter providing cost effective buildings.
• Up to "Class 1" fire rating : polycarbonate is a self-extinguishing material which will melt away from the flames, stopping as soon as the source is removed. Note: 6mm Twinwall does not have a Class 1 fire rating.

Marlon provides high levels of insulation.

Corotherm provides high levels of insulation.

The Corotherm range by Ariel comes with a 10 Year Guarantee.


WIDTH 700mm
LENGTH 6000mm


Size 4000mm x 1050mm
6000mm x 700mm
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4000mm x 700mm
4000mm x 2100mm
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3000mm x 1050mm
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Colour Opal Material Polycarbonate

Questions & Answers


How much light am I likely to lose from having opal heatguard rather than clear? As the roof is outside my kitchen window, I can't afford to lose much light but also need to reduce the heat under the polycarbonate.


The clear offers about 63% light transmission whereas the opal heathguard is about 4% so there is an extra loss of light with the heatguard.


I have a polycarbonate roof and want to know if I can add this product underneath my existing roof and can I use spray glue to fix it please


To have an effect you would really need this on the external part of the roof, sticking it is not ideal it would be better to actually re-do the whole roof in this Polycarbonate.


5 / 5 1 reviews
Reviewing Marlon 25mm Heatguard Opal Sevenwall Polycarbonate - 4000mm x 700mm
26th November 2020
Cut symmetrically on each side. Looks quality. No scratches and protective film intact on delivery. Well packaged.
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Marlon 25mm Heatguard Opal Sevenwall Polycarbonate Roof Sheets

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