Dual Roof Anti Condensation System

Overview

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.

CONDENSATION FACTORS

Condensation 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.

Independent 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 insulation.

DUAL ROOF BENEFITS

• Eliminates condensation.

• Great energy savings.

• Cost Effective.

• Can Be combined with Webglas GC or ClearSlide which allows for longer sheet lengths.

• Effective thermal insulation.

Available Profiles

Most current and superseded roofing profiles can be used with the Dual Roof System. Please contact your nearest Ampelite Office for details.

Click here to view profiles.

Quality

Ampelite premium Industrial grade "Dual Roof" fibreglass is manufactured in strict accordance with AS/NZS 4256 parts 1 & 3: 1994. Standards Licence No.986.

N.B."Dual Roof" incorporates gel coat surface protection as used for "Wonderglas GC" premium grade sheeting. The highest quality materials available and the very latest resin technology are used in the manufacturing process.

Spanning Capacity

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.

Sheeting Grades

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').

Fixing Allocation

Other profiles can be used - please consult an Ampelite office for further information.

Installation

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 buckling.

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:

1. Fasten fibreglass sheeting in the same manner as metal.

2. When Job is completed, remove fasteners on fibreglass section.

3. 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.

• Alternatively, Ampelite recommends the use of Fibreglass Teks or Clearfix industrial fasteners which drill an oversize hole as they fix.

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 side.

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 foot traffic.

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.

Safety Data

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 particles

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 attention.

Skin (contact) Can cause irritation. Shower thoroughly using soap and a cloth or sponge.

Inhalation (breathing) Dust masks are recommended although particles are not respirable.

Ingestion (swallowing) 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.

1. Use a self contained breathing apparatus.

2. Fire may be controlled by use of sand, carbon dioxide, dry powder or foam extinguishers.

3. Water can be used to prevent fire from spreading to other goods or buildings.

Ampelite Fibreglass

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 Retardant resins.

Physical Description: 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.

Ingredients: Polyester 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.

Warranty

Dual Roof features a limited 25 year warranty. For full warranty details, please contact your nearest Ampelite office.

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Dual Roof Anti Condensation System