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Topglass GC

Gel-Coated Roofing and Cladding



Introduction

Topglass GC is a recent development in the Topglass Natural Lighting family of products and uses an innovative manufacturing process developed by Alsynite NZ Ltd whereby Gel-coat is applied to the weather surface of the sheeting.

Offering exceptional resistance against corrosive atmospheres, and providing protection against solar deterioration Topglass GC brings additional benefits to Building Designers and owners.

Topglass GC can also be supplied in “solid colours” providing an excellent alternative to metal roofing and cladding systems in corrosive environments.— See Topclad page.


 

Key Benefits

  • Manufactured from an acrylic modified polyester resin system and incorporating additional ultra violet stabilisers, Topglass GC utilises anti-static high quality glass fibre rovings to give maximum strength during the curing and bonding process;
  • The ultimate benefit of the Topglass GC product over general purpose grades of GRP natural roof lighting products is the addition of a UV-stabilised 100 micron gel-coated surface which is reactive thermo-set to provide a high gloss surface;
  • Topglass GC, which is manufactured to meet the requirements of AS/NZS 4256:3.1994, is economical and provides flexibility whilst resisting UV degradation and yellowing much longer than is commonly experienced with general purpose grade translucent roofing products.



 

Applications

  • Roof and wall lighting to all commercial, industrial, institutional and other buildings requiring long term natural lighting without early surface degradation;
  • School/Kindergarten and public outdoor areas requiring good UV protection.


 

Special Applications

  • Topglass GC can be pigmented to meet varying light transmission requirements

 

Surface Coatings

The gel coat used in the manufacture of Topglass GC gives very good protection against solar deterioration. The reverse side of the sheeting is protected with a 20 micron stabilised Polyester film. Where corrosive atmospheres exist which affect the underside of the sheeting, a Proprietary high-sheen corrosive resistant surface can be supplied in place of the film.

 

Colours

Topglass GC is available in standard colours of Clear, Opal, and Cream.
Cool versions can be supplied as Topglass SPF 4, and Topglass SPF 8 along with Topglass GC Cool. (See heat reducing sheeting) Other colours and pigment variations are available on request to suit specific design applications. Consult FGW Corporation as minimum quantities apply.


 

Heat Reducing Sheeting

Topglass GC can be supplied as heat reflective translucent roof sheeting. Topglass SPF, and Topglass GC Cool

Topglass SPF:Supplied as Topglass GC SPF 4 and SPF 8, these revolutionary new products utilise a purpose developed compound, similar to that used in the manufacture of modern day Sunglasses, whereby the product differentiates and then separates Infra-Red (heat) whilst continuing to maintain maximum light transmission . Topglass GC SPF is available to match all roofing profiles

Topglass GC Cool: A lower cost product than Topglass GC SPF, which utilises innovative pigments to absorb and reflect heat away form the interior of a building whilst maintaining long-term effective light transmission. Topglass GC Cool is available to match all roofing profiles
Operating Temperature

The operating temperature parameter of Topglass GC is-30ºC to + 70º C.

 

Fire Retardant

Topglass GC can be supplied as fire retardant sheeting.

 

Trafficability

Where trafficability is of concern contact FGW Corporation for specific technical support.

 

Severe Corrosion Environments

In areas where corrosion is severe Topglass GC can be manufactured using a special purpose vinyl ester corrosion-resistant resin system.

 

Specification

The Translucent roofing shall be Topglass GC (Insert tint/colour) reinforced Polyester roof sheeting as manufactured by FGW Corporation to comply with AS/NZS 4256.3:2006
The sheeting shall be .........g/m2 or .........mm and manufactured to conform to the nominated roofing and cladding profile. Installation shall be carried out in accordance with the requirements of AS/NZS 1562.3: 1994, Australian Roofing Code of Practice and FGW Corporation Technical catalogue.

 

Warranty

Topglass GC is supported by a comprehensive 25 year project warranty. Specific targeted project warranties maybe available. Refer to the FGW Corporation Technical Catalogue for warranty details or contact FGW Corporation.


 

Span Capacity Chart

 

Spanning Capacity Eco-Lite 10 and Topglass Grades

 

                                   Sheet Weight g/m2                   

   Recommended number of fasteners

 

2400

3050

3660

4270

4880

                Roof

                Wall

Profile

                                 Purlin Spacings                      

Mid Span

End Span

Mid Span

End Span

Corrugated

1200

1500

1700

 

 

4

6

6

6

Trimdek

1500

1700

2000

2300

 

5

5

5

5

Spandek

1600

2000

2300

2600

2800

5

5

5

5

Longspan

1600

2000

2300

2600

2800

5

5

5

5

Kliplok 406

1400

1700

2000

2300

2600

3

3

3

3

Kliplok 700

1400

1700

2000

2300

2600

4

4

4

4

Speedek

1400

1700

2000

2300

2600

3

3

3

3

The above spans are recommended for wind loads up to 1 Kpa

 

 

 

 

Physical Properties Chart

Specific Gravity 1.45
Tensile strength 90 Mpa
Surface Hardness minimum 40 Barcol
Impact strength minimum 1.96 Mpa
Shear strength 90 Mpa
Modulus of Elasticity 5,500 Mpa
Thermal Expansion 2.0 x 105 cm/°C
Water Absorption 0.2% in 24 hrs at 26°C
Flexible strength 145 Mpa
Service temperatures -20 to 95°C
Available colours Opal, other colours available upon request (Min order qty)

 



Expansion Data Chart

Material Expansion Comparisons 0 - 40°C temperature variation
  Fibreglass Polycarbonate Steel Aluminium
Thermal
expansion
7.2mm 16.2mm 2.9mm 5.8mm
Thermal
coefficient
3x10-5cm/cm/°C 6.75x10-5cm/cm/°C 1.2x10-5cm/cm/°C 2.4x10-5cm/cm/°C





Weights Chart

Series Weight Kg/M2
2400 2.4
3050 3.05
3660 3.66
4270 4.27
4880 4.88

 

 

Visible light & Solar Transmission Chart

Visible Light and Solar Transmission
  Clear Opal Cool
  Light             Solar Light             Solar Light             Solar
1800g
(1.1mm)
84%             75% 78%            69% 38%           31%
2400g
(1.5mm)
74%            65% 65%            60% 30%           28%
3660g
(2.5mm)
62%            58% 60%           56% 24%            21%
Further Topglass GC Solar, Optical and Ultra Violet Transmission information is contained in the technical catalogue

 



Download Installation Instructions   (requires Adobe Acrobat to view)

Download Topglass GC brochure

Design considerations

Profiles

Safety Data



** Nominal 100 micron gel coat

    
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