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Correct Installation is important:
Carefully follow all Ampelite fixing instructions. Allowance needs to be made when drilling screw holes so that the sheet can move freely as it expands and contracts. Screw holes must have a minimum diameter of 10mm. All screws must be fitted with 26mm Ampelite grey domed weather-proof seals. Avoid over tightening as this may cause the sheet to crack or split. Sunclear is fixed and flashed on similar principles as steel roofing. Minimum fall is 5 degrees. Start by fixing the first sheet at the end farthermost from the usual wind direction. If end laps are necessary, start at the bottom corner. Where the sheet is lapping into existing steel roofing, paint the metal white at the overlap area, flashing should also be painted white. The tops of the timber frame work that ‘Sunclear' is to be fastened to also be painted white. Before fixing sheets apply white paint along the battens or purlins to minimise heat build up under the sheet. Where the sheet is lapping into existing steel roofing, paint the metal white at the overlap area, flashing should also be painted white. Heat build up will cause damage to the sheet and cause it to discolour and deform. Start by fixing the first sheet at the end farthest from the usual wind direction. The side laps then face away from the wind. If end laps are necessary. Start laying at a bottom corner.
Side Laps:
The standard corrugated profile is side lapped by one corrugation, but depending on the degree of exposure and weatherproofing required, this can be increased to 2 ribs. Mini corrugate is lapped two corrugations.
SCREWS, WEATHERPROOF SEALS AND SEALANT: Roofing sheets are crest fixed, but walls can be valley fixed. It is important to only use only 26mm Ampelite grey domed seals, that are chemically compatible with PVC.If sealing is required at the side and end laps, or screw seals, use a co-polymer sealant specifically formulated to be compatible with PVC. Incompatible sealants weaken the sheeting and their use voids warranty.
DRILLING SCREW HOLES: To allow for the expansion and contraction of sheets, holes must be drilled oversize. Screw holes must have a minimum diameter of 10mm for sheet lengths up to 3.6m. To fix standard corrugated use 50mm x 10g screws and for the mini corrugated profile use 45mm x 10g screws.
CUTTING OF SUNCLEAR SHEET: Sunclear is best cut with sharp snips; small cuts can be made with sharp scissors. It is recommended to cut and drill Sunclear on warmer days. Attempting to cut or drill PVC sheeting on cold days may cause the sheet to crack and split.If a power saw is used, it should be fitted with a fine tooth blade designed to cut plastics. Do not use high speed cut-off wheels or similar as they cause melting.
SPANS, OVERHANG AND END LAPS: Please refer to the Span Tables and do not exceed the measurements shown. Overhang at the eave must not exceed 100mm and be less in high wind areas. Total end lap at battens or purlins should not exceed 200mm as shown above.
CLEANING: Use only a soft brush and soapy water, No abrasives. We recommend cleaning twice a year and when bird soil and dirt is apparent.
CONDENSATION: Under single skin roofs and especially in cold weather, some condensation is generally unavoidable. Good ventilation will always help minimise condensation.
STORAGE: Sheets should be stored in cool, sheltered surroundings. Do not place heavy materials on the sheet. Always support the sheet when moving. Sheeting exposed to the sun and rain or stored under tarps etc, can be damaged either by distortion or condensation between sheets. Damage caused by incorrect storage or handling is not covered by the warranty.
Important: Do not store stacks of sheets in direct sunlight because sheets at top of the stack will act like a magnifying glass and could cause damage or distortion to the sheets at the bottom of the stack. Like all plastic roofing products Sunclear is subject to the effects of weathering and the very high levels of ultra violet light which are present in New Zealand. This means that over the years there will be some loss of light transmission and impact resistance.
Handy Tips: Handy tips: You could try some practise holes using an off cut or part of a sheet which would be covered by ridging, flashings etc. You may find it easier to drill the hole for the screw first and then enlarge this to 10mm for the washer.
A piece of wood with a hole drilled in it can serve as a useful drill guide.
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