Polygal Twin Wall Sheeting
York Precision Plastics is an exclusive distributor of the premium Polygal range of twin-wall roofing products with the inherent integrity of Polygal roofing sheet offering a wealth of structural variations for all glazing requirements.
Applications
Pergolas
Greenhouses
Pool Enclosures
Sunrooms
Atriums
Covered Walkways
Verandahs
Skylights
Stock Colours Dimensions
Polygal Solar Grade
Colours: Clear, Bronze Tint, Grey Tint and Opal.
Available in: 8mm x 700mm, 8mm x 1220mm and 10mm x 980mm
Sheet lengths mm: 2500, 3000, 3500, 4000, 4500, 5000, 6000, 7000, 8000, 10,000
Accessories
Aluminium Sealing Tape, Fasteners, Aluminium Joining Bars with Neoprene Gaskets, Ridge Profiles, Flashing Profiles, Aluminium End Capping
Installation Guide
Fastners: Use only Polygal screws with 25mm metal bond washer. Pre drill holes to 10mm to allow for expansion and contraction. Sheets should be fastened every 305mm. Do not screw closer than 40mm to edge of sheet.
Fixing: Fix sheet with UV protection facing the sun. The UV protected side of Polygal sheets are indicated on the blue masking and must be glazed to the outside. The green masking indicates the underside of the sheet.
Roof Fall: Polygal is not recommended for roofs with slope or pitch less than 5º (87mm/1000). eg. 1x3m sheet = 261mm fall. Ribs should run vertically to allow condensation to drain and prevent algae growth within the ribs.
Overhang: To avoid sheet damage in high wind areas the maximum overhang at the roof edge or gutter line should no exceed 50mm. It may be necessary to screw through sheeting along purlins or battens.
Cutting: Polygal sheets can easily be cut using a sharp knife, handsaw, jigsaw or circular saw with a fine tooth blade. When using a saw swarf will enter fluting. This can easily be removed with a vacuum cleaner or air hose.
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