Dual Roof Anti
In today’s environment of conservation, the
reduction of energy consumption, the importance of environmentally friendly,
cost effective products is ever increasingly recognised.
The savings and benefits in supplying natural
daylight in the workplace and in recreational facilities can be maximised at a
fraction of the cost of dual glazing with Ampelite's Dual Roof System.
This system provides good, evenly diffused natural light, eliminates
condensation, and reduces transmitted heat.
The Ampelite Dual Roof
System utilises the fundamental principles of double glazing in an innovative
manner suited to the Australian climate; simplicity and ease of installation set
it apart from complicated and costly double glazed skylights originally designed
for overseas countries with cooler climates. Dual Roof is not unique in
theory, in practice it provides long term cost savings with valuable benefits
both to users and the environment..
Sports stadiums and multi-purpose halls
where condensation quickly forms on the skylight panels due to internal warm
moist air meeting with the cold skylight surface, have been quick to embrace the
Ampelite Dual Roof Anti Condensation Skylighting System to solve the problem.
will form on any surface having a temperature below the dew point
temperature of the air under consideration. The relative humidity
(amount of water vapour in the atmosphere) within a sports stadium can
change rapidly with large numbers of occupants. At normal
ventilation rates, a body of air will absorb moisture from the occupants
at the rate of 50 - 60g/person/hour. This may result in the
moisture content exceeding that of the external air by about 2g/kg of
dry air. Therefore the risk of condensation forming on cooler
surfaces increases dramatically.
engineer's testing has established that the Ampelite Dual Roof Anti
Condensation System displays superior thermal properties to conventional
single sheet skylighting systems. Effectively this means better
DUAL ROOF BENEFITS
Most current and superseded
roofing profiles can be used with the Dual Roof System. Please contact your
nearest Ampelite Office for details.
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Ampelite premium Industrial grade "Dual
Roof" fibreglass is
manufactured in strict accordance
with AS/NZS 4256 parts 1 &
3: 1994. Standards Licence No.986.
incorporates gel coat surface protection as used for "Wonderglas GC" premium
grade sheeting. The
materials available and the
very latest resin technology
are used in the
|Industrial Standard and
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').
The following table gives the recommended rib
allocation for Dual Roof Spacers.
Screw length includes
Weatherlok washers. All screws are 12#, Type 17 fixing to
timber or Metal Tek fixing to steel. The use of Clearfix
Industrial or Fibreglass Teks both with 32mm Weatherlok washers
are recommended. These screws cut an oversize expansion
hole as they drill.
||Ribs 2, 5, 8, 11
||Ribs 2, 4, 5, 7
||Ribs 2, 4, 6, 8
Other profiles can
be used - please consult an Ampelite office for further information.
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.
Dual Roof Anti