Industrial Fibreglass Roofing
Supreme Plastic Roofing proudly sell the vast range of Alsynite manufactured Glass Reinforced Polyester (GRP) roofing products under the well-respected Topglass® Brand, for industrial, commercial, horticultural, and domestic projects.
Topglass® translucent roofing has been specifically developed to combat the effect of ultraviolet rays and atmospheric pollutants, without the yellowing and rapid product degradation associated with commonly available glass-reinforced roof sheeting. Topglass® is a fibreglass product that is a commercial-grade GRP (glass fibre-reinforced polyester) and is used as a translucent roofing and cladding product. Through research and development, Alsynite has expanded its range of products into twin skin and tripleskin systems to address condensation issues where an insulated product is a requirement.
Alsynite sheeting is available in a wide range of products, weights, pigments, and colours. It is competitively priced and supported by warranties of up to 25 years, depending on the product selected. Topglass sheeting is manufactured to meet the AS/NZS.4256:3 manufacturing standard, and is JAS-ANZ Certified, which has legal recognition in more than 90 countries.
Topglass product catalogue below
Click here to see the range of profiles available.
Product Range
Topglass® GC is the flagship of the Topglass® natural lighting family of products. Using an innovative process, a 130 micron* EXO-SET 206 Premium Gelcoat is applied to the weather surface of the sheeting.
Provides an excellent alternative to metal roofing and cladding systems in corrosive environment. Topglass GC is also available in solid colours - providing an excellent alternative to metal roof.
Click here to view our full range of Topglass GC Profiles
Topglass® GC Ultra-Safe addresses Industry concerns relating to Natural Roof-Lighting being classified as “brittle” and therefore possibly posing a danger to foot traffic on the roof. Alsynite One NZ has developed a heavy duty and high impact roof lighting system named Topglass® GC Ultra-Safe, the product utilises a heavy duty, woven roving reinforcing system positioned within the resin matrix, thereby providing exceptional strength.
If you are looking for a trafficable natural lighting roof product then Topglass® GC Ultrasafe is the product you want.
Topglass GC SPF is a revolutionary and innovative GelCoated natural lighting product developed using Alsynite One NZ Technology and aptly named Topglass SPF – Solar Protection Feature.
Encompassing a unique manufacturing process similar to that used in the design and manufacture of modern sunglass eyewear, Topglass® SPF Solar control roof lighting, selects and singles out Infra-Red (heat) plus harmful Ultraviolet rays, thereby preventing heat build-up and UV damage to Stock and Plant.
Topglass® GC FR50 is designed and supplied as a fire and smoke retardant natural lighting system for use in commercial and industrial buildings. This type of resin system alters the flammability point of the sheeting.
Topglass® GC FR50 is glass reinforced polyester fire retardant sheeting that can be considered into building designs that specifically require reduced ignitability, flame propagation and heat and smoke release over conventional resin systems.
High Wind Zone Information
A new wind zone category has been introduced in the NZS 3604:2011 Timber-Framed Buildings, and the amended E2/AS1. The Extra High Wind Zone Category allows for a wind speed of up to 55 m/s. This means more buildings come within the scope of NZS3604:2011 and E2/AS1. Source: Build Magazine, Feb/March, 2012. Author: Elide Alkink, Freelance Technical Writer. For fixing recommendations for your wind zone, please contact Supreme Plastic Roofing.
SAFETY NOTE: To comply with the requirements of AS1562.3:2006 Part 3 Plastic, translucent roofing products are classified as "Brittle Roofing" and therefore not suitable to support foot traffic. With exception of Topglass GC Ultra Safe. Safety mesh should be installed under all translucent roofing.
Click here to see the range of profiles available.
Where Topglass fibreglass roofing is used
Topglass fibreglass roofing is commonly specified across a range of industrial and commercial building types. Agricultural sheds and barns use it to bring natural light into stock housing and storage areas, with Topglass GC SPF suited to areas where heat build-up over stock or plant needs to be controlled. Warehouses and distribution centres use it to reduce daytime lighting costs across large roof areas. Processing and manufacturing plants use Topglass GC in corrosive or chemically exposed environments where standard metal roofing would degrade faster. Retail and commercial buildings use GC Ultra-Safe where roof access for maintenance is a regular requirement.
Which Topglass fibreglass roofing is right for you?
| Product | Key feature | Best for |
|---|---|---|
| Topglass GC | Premium gelcoat finish, solid colours available | Corrosive environments, alternative to metal roofing/cladding |
| Topglass GC Ultra-Safe | Heavy-duty woven reinforcing | Trafficable roofs where foot traffic access is needed |
| Topglass GC SPF | Filters infra-red heat and UV | Protecting stock and plant from heat build-up and UV damage |
| Topglass GC FR50 | Fire and smoke retardant | Commercial and industrial buildings requiring reduced ignitability |
Frequently Asked Questions
Pricing depends on the product, profile, and project size. Get in touch with our team for a quote based on your specific requirements.
Topglass is a Glass Reinforced Polyester (GRP) translucent roofing and cladding product, manufactured by Alsynite. It's developed to resist UV rays and atmospheric pollutants without the yellowing and rapid degradation common in other GRP roof sheeting, and it's used across industrial, commercial, horticultural, and domestic projects.
Topglass GC is the flagship product, finished with a premium gelcoat and suited to corrosive environments as an alternative to metal roofing. GC Ultra-Safe adds a heavy-duty woven reinforcing system, making it the only trafficable option in the range. GC SPF filters infra-red heat and UV rays to prevent heat build-up and UV damage, suited to protecting stock and plant. GC FR50 is a fire and smoke retardant version designed for commercial and industrial buildings with reduced ignitability and flame propagation.
Generally, no. Under AS1562.3:2006 Part 3, translucent roofing products are classified as brittle roofing and aren't suitable to support foot traffic. Topglass GC Ultra-Safe is the exception, built with heavy-duty reinforcing specifically for trafficable use. Safety mesh should still be installed under all translucent roofing.
Topglass roofing can be specified for high wind zones, including the Extra High Wind Zone Category introduced under NZS 3604:2011, which covers wind speeds up to 55 m/s. Fixing recommendations vary by wind zone, so contact our team for advice specific to your site.
Warranties run up to 25 years depending on the product selected.
Yes. Topglass is manufactured to match a wide range of common roof profiles, so it can be installed alongside existing metal roofing without a mismatch. View the full range of available profiles to check compatibility with your project.
Topglass is manufactured to the AS/NZS 4256:3 standard and is JAS-ANZ certified, a certification with legal recognition in more than 90 countries.
Yes. Topglass GC is designed as an alternative to metal roofing and cladding specifically in corrosive environments, where metal roofing would otherwise degrade faster.
Twin skin and triple skin systems are insulated builds developed to address condensation issues, where a single skin sheet wouldn't provide enough thermal performance. Single skin is the standard option for most industrial and commercial applications.
Topglass GC SPF is a solar control roof lighting product that filters out infra-red heat and harmful UV rays, using a process similar to modern sunglass lens technology. It's particularly suited to agricultural and industrial buildings where preventing heat build-up and UV damage to stock or plant matters.