POLYXPAND™ – CREST FIXING PLASTIC SKYLIGHT FASTENERS
POLYXPAND™ skylight fixing fasteners are designed to create a much-required thermal expansion hole on plastic roofing materials and then securely fastened onto the purlin underneath in one-go.
Owing to the wings on the drilling tip, a 10mm diameter thermal expansion hole is created during the process, which then snaps off immediately upon coming in contact with steel.
A large domed BAZ washer completes the package, covering the expansion hole while providing superior strength against high winds.
POLYXPAND™ Crest Fixing Fasteners can be used on all kinds of plastic glazing material and especially effective when used as corrugated roof screws, with its length designed to accommodate the crest height of our ROMA and GRECA profiles.
*Note that because water, along with other liquids flows to the lowest point, PolyXpand fasteners have to be fixed at the crest on roofing sheets.
• True Australian AS3566 Standard
Hex Washer Flanged Head:
Separate EPDM steel bonded washer NOT required. (No risk of leakage)
• Thermoset 100% EPDM BAZ washer:
√ Weathering Resistant (UV / Ozone / Acid)
√ 100% Leak proof sealing
√ Perfect fit under hex washer flange
√ Optional metal washer add-on
√ Shock absorbing (for high wind areas)
• Creates a 10mm dia. thermal expansion hole for plastics.
• Winged Drilling Tip:
Wings break off once in contact with the steel purlins,
keeping the plastics sheets securely fastened.
*Incorrect screws create stress cracks and thus leakage on Polycarbonate or other Plastic Sheets. Contact us for more information on where and how to install PolyXpand Crest Fixing fasteners.
Thermoset 100% EPDM BAZ Washer:
√ Weathering Resistant (UV / Ozone / Acid)
√ 100% Leak proof sealing
√ Perfect fit under hex washer flange
√ Shock absorbing (for high wind areas)
√ Optional pre-assembled metal washer – suitable for extremely high wind areas.
