Australia's most experienced
and largest manufacturer of fibreglass roofing introduced "Wonderglas
GC" gel coated sheeting to Australia in 1994, adapting the process
originally developed by BP chemicals in the United States, to expressly
combat Australia's very harsh environment.
For more information on
Ampelite’s Gel Coat technology, click here.
Strength And Flexibility
Over the life of the sheet "Wonderglas
GC" retains it's strength and flexibility, it does not lose it's tensile
strength or become brittle as happens with film surface coated and
polycarbonate materials. Generally speaking, film coated
fibreglass reinforced polyester sheeting has a history of failure under
Australian conditions. While it has been a means of delivering
natural light, the short comings of erosion, combined with loss of light
transmission, discolouration and water penetration, have called for a
decided improvement. Wonderglas GC, with a UV resistant Gel Coat
of 100 microns in thickness, replacing surface film of just 20 microns,
has provided this improvement.
Since then Wonderglas GC has been proven
in many thousands of installations throughout Australia and New Zealand,
and in many Asian regions. Ampelite's policy of continual product
improvement, as new technology and materials are available, ensures
product leadership. The highly UV resistant resins used in the
manufacture of Wonderglas GC provide the ultimate in protection - ahead
of even the latest surface film technology. The 100 micron thick
gel coat is integral with the sheet (chemically cross bonded), and no
delamination is possible. The gel coated sheet surface becomes an
almost impenetrable barrier that reduces surface erosion and loss of
light transmission to negligible proportions. The proven
performance of Wonderglas GC remains unsurpassed and puts this
Australian made product at the cutting edge of world resin technology.
In addition to exceptional performance,
even under adverse conditions, Wonderglas GC has a very high resistance
to a range of common chemicals. So much so, that entire industrial
plants are clad with gel coated woven mat reinforced fibreglass
("Webglas GC" also an Ampelite product) to eliminate corrosion.
The benefits of Ampelite's "Cool-lite"
Heat Reduction sheeting, or "SR76" Fire Retardant sheeting can be
incorporated into Wonderglas GC. Many installations utilise these
options, sometimes combining them.
All current profiles
(see link below) such as
Corrugated, Trimdek, Speed-dek,
etc. plus most superseded profiles are available. Click here to
Australian made Wonderglas GC premium grade
glass reinforced polyester sheeting is
manufactured in strict
AS/NZS 4256.3:1994. Standards Licence No.986.
Ampelite is a quality Endorsed Company
complying with AS/NZS ISO 9001:1994, Licence QEC 4787.
Ampelite warrant series 2400 (and
upwards) Wonderglas GC premium grade gel coated industrial fibreglass
sheeting against damage from hailstones up to 20mm in diameter
accompanied by winds up to 100 km/hr for 10 years.
Superior Features of Wonderglas GC
Light transmission is
maintained. Loss of light
transmission after 10 years is just 10% compared to a loss of 30% for
standard 20 micron surface film protected fibreglass sheeting.
Wonderglas GC has a highly UV resistant gel coat of 100 microns.
Very high resistance to
yellowing and discolouration.
Over 10 years changes are negligible and are covered by warranty.
Only minor changes may occur in later years.
Surface erosion (fibre show)
is eliminated. It is covered by
warranty for 25 years.
Low surface erosion. This also
improves weathering properties. The 100 micron gel coated surface
provides an impenetrable barrier and the sheet is warranted against
water penetration for 25 years. Inbuilt UV protection eliminates
99% of harmful UV rays.
and Cost Effectiveness
Fibreglass sheeting has
progressively overcome UV attack with the development of UV Stable
Resins, and has retarded weathering by the application of surface films.
However, surface films, are just 20 microns thick, and only prolong
weathering and do not defeat it. The newer surface films have no
history in actual use, and must rely on "Weathermeter" testing to
predict likely deterioration over a long period of years.
The introduction of
Wonderglas GC in 1994 has proven to be a very significant advance in
fibreglass sheeting. Wonderglas GC has a highly UV resistant gel
coat 100 microns thick chemically cross bonded to the UV resistant base
resin. The gel coat is 5 times the thickness of surface film, it
is integral with the sheet and cannot delaminate. Premium grade
Wonderglas GC permanently withstands weathering, retards fading,
maintains excellent light transmission and has a higher resistance to a
range of common chemicals than standard fibreglass sheeting.
Actual usage has proved that gel coated Wonderglas GC is eminently
suitable for long term industrial and commercial use.
In determining the cost
effectiveness of Wonderglas GC over a term of 25 years, or the life of
the building, consideration must be given to the benefits. These
include lower maintenance or replacement costs, the continuing benefit
of excellent natural lighting with only minor deterioration over the
products lifetime. Also, lack of brittleness and high resistance
to hailstones over many years. Finally, the sound weatherproofing
of the building and its better appearance long after other materials
It is estimated that
commonly used surface film protected fibreglass sheeting can actually
cost up to 300% more based on replacement of product at useful life
intervals, at present day cost per square meter. Testing
undertaken by CRC (an independant government body) in Report No.
CRC-P-TR-030 came to the conclusions that: "Gel coat was the most
resistant coating. A correctly formulated gel coat being more
effective than the use of weather resistant thermoplastic surface
GC has also been tested at Allunga QLD, through the Allunga Exposure
Laboratory. Allunga is an independent laboratory that specialises
in natural weather testing, and is well known in Australia and overseas.
All methods of testing are performed to strict Australian Standards.
The Altrac system (in which the sample tracks the sun), is generally
accepted to have a 5:1 weathering value. The Wonderglas GC result
was a light loss of 22% over a period equivalent to 20 years exposure.
The test product still displays a very smooth, glossy surface with no
fibreshow at all.
Wonderglas GC technology was developed in the United States through BP
Chemicals, and has been in the American market for in excess of 25 years
and widely used throughout Australia since 1994.
|Industrial Standard and Premium Grades
The above spans are recommended for wind loads up to 1 kPa.
For information regarding recommended spans in high wind
and cyclonic regions please contact your local Ampelite office.
Important: Heavier grades give the specifier the option to use
Ampelite sheeting in cyclonic zones, or match the span of the nominated steel
roofing material (see 'Spanning Capacity' above).
Light and Heat Transmission
For Light and
Heat transmission of other series (grades), please contact your local Ampelite
office. Other colours can be produced to order for viable quantities.
Materials Expansion Comparison. 0° to 40° Temperature
Variation. Sheet Length 12 metres
||3.0 x 10-5
||6.75 x 10-5
||1.2 x 10-5
||2.4 x 10-5
|Modulus of Elasticity
||3.0 x 10-5 cm/°C
||.2% in 24hrs./26°C
|Curved Roof Radius
||2400g/m2 "Corrugated" and "5-Rib"
|Recommended Service Temperature Range
||-20° to +96°C
The following installation
procedures are recommended by the product manufacturers — Ampelite
Australia Pty Ltd.
These recommendations closely
follow the Australian Standard: Design and installation of Sheet Roof
and Wall Cladding, Part 3: Plastic. AS 1562.3-2006
Where wire safety mesh is incorporated under the fibreglass
sheeting and over a purlin, a protective purlin strip must be installed
to prevent fracturing. Ampelite manufacture a 65 mm wide self adhesive
fibreglass strip which, when viewed from below is not visible.
In roofing applications, fixings shall be fitted
through the crest of any profile. Oversize screw holes from 10 mm up to
15 mm must be drilled at all points of fixing. Only 32 mm 'Weatherlok'
seals should be used. These seals are large enough to cover the oversize
hole and are sufficiently flexible to contour to any corrugation (or
rib) when medium pressure is applied. Medium pressure means that the
'Weatherlok' seal is contoured to the shape of the corrugation (or rib),
but rib or corrugation must retain its shape without any sign of
Contractors must make sure that the fixing is located
in the centre of the oversize hole, or the benefit of the larger hole is
lost. To ensure accuracy, Ampelite recommends the following:
Fasten fibreglass sheeting in the same manner as
When Job is completed, remove fasteners on
Using the existing screw hole as a guide, drill an
oversize hole, swap neoprene washer (used in step 1) with
'Weatherlok' seal and reinstall the fastener.
Ampelite design and recommend the fibreglass sheets to
be installed on top of metal roofing on both sides. The sheet rib can
still go over and under when fibreglass sheets are installed side by
Where fibreglass sheets are end lapped including those
with dissimilar materials, two lines of Lapseal Tape or a flexible
sealant shall be placed across the full width of sheet. Each strip is
placed approximately 150 mm apart with one line located 25 mm from the
end of the fibreglass sheet. Ampelite recommends the use of 25 mm
Lapseal Tape as silicone sealants can harden and cure due to exposure to
daylight. The over-lapping sheets then become locked together as one
sheet, effectively stopping movement between the sheets, and possibly
causing buckling. With decking profiles install Lapseal Tape in the tray
only or use a flexible sealant.
Fibreglass sheeting is not easily reshaped after
manufacture, and will require special weather seals to be provided at
all flashing and capping points. Typically, a foam closure strip
matching the profile of the fibreglass sheet should be bonded to the
pans or valleys with a flexible weatherproof sealant. Ideally it should
be fitted at least 100 mm behind the turn down of the flashing.
Ampelite fibreglass sheeting (with the exception of
Webglas GC) is a non-trafficable material. Sheets should be handled with
care to avoid damage to the surface coating which is either Melinex film
or Gel Coat according to the grade. Guarantees will not apply to
sheeting that has been damaged in handling, or mechanical damage due to
Furthermore, unless the above instructions are
strictly adhered to, Ampelite Australia Pty Ltd cannot accept any
responsibility for consequent leakage problems, caused by sheets
buckling or "ocean waving".
Further information can be
obtained from an Ampelite office in your area.
Products: Industrial and Premium
grade Industrial Fibreglass Sheeting. Manufactured to AS 4256.3-2006.
There are no ill effects from handling Ampelite
Fibreglass sheets as a finished product.
Some exposure to air-borne particles occurs on
drilling, cutting and trimming of the material. Although there are no
known cases of harmful effect, even after long term exposure, it is
recommended to take certain precautionary steps.
Effects of exposure to dust
Eye (contact) Can cause
irritation. Appropriate eye protection should be worn. If irritation
occurs due to exposure to dust particles, wash eyes with running water
using an eye bath or wash bottle. If irritation persists seek medical
Skin (contact) Can cause
irritation. Shower thoroughly using soap and a cloth or sponge.
Dust masks are recommended although particles are not respirable.
Non-toxic. Extensive studies have revealed no serious effects.
Emergency Fire Fighting Action
In the case of an indoor fire relating to stored
Fibreglass Sheets the following action is necessary.
Use a self contained breathing apparatus.
Fire may be controlled by use of sand, carbon
dioxide, dry powder or foam extinguishers.
Water can be used to prevent fire from spreading
to other goods or buildings.
Use: Generally as a
translucent, light transmitting, panel in roofs or walls of buildings.
May find use in specialty applications due to resistance to corrosion.
Can also comply with Building Code requirements when using Fire
Ampelite roof sheeting is the product of the halogenated polymerization
of polyester resin by the addition of a suitable catalyst. The resin is
supported by a matrix of chopped glass reinforcement. The sheeting is
glass like in appearance and is odourless.
resin is an unsaturated thermosetting resin resulting from the
esterification of suitable poly vasis acids and polyhydric alcohols
dissolved in selected vinyl monomers. The catalyst system uses an
addition of cumene hydro peroxide solution. The reinforcing is
translucent sheet roving manufactured from E Type glass. The
polymerization results in an inert resinous material.
Fire: Fire Retardant
Sheeting has been tested in accordance with AS/NZS 1530.3-1999. It will
support combustion and sheeting will only burn when flame assisted. All
normal extinguishing media may be used. Thermal decomposition products
include carbon monoxide, styrene, methyl methacrylate, acrid smoke and
hydrogen chloride and bromide.
For further information contact
your local Ampelite Office.
features a limited 25 year warranty. For full warranty details, please contact
your nearest Ampelite office.