Polycarbonate Roofing Fasteners Series
POLY-FAST™ roofing fasteners feature a Thermal Expansion Hole Cutter that creates a much-required thermal expansion hole on plastic profiled roofing panels. The panels are then securely fastened onto the purlin support underneath in one–go.
A nominal 11mm diameter hole is created by the Thermal Expansion Hole Cutter during the process. When mated with the Thermal Expansion Hole Cutter, with the Depth Stop Knurls acts as a stopper, the height at where it stops upon coming in contact with the purlins; enough so that it prevents screw over-run or over-drive, provide a perfect seal to the enlarged hole, but not deform the corrugations. BDN Fasteners polycarbonate roof fasteners are designed to create precise thermal expansion holes for fixing polycarbonate roof sheets.
A large Domed Weatherseal EPDM washer with two concentric sealing rims on the washer underside completes the package.
- The domed structure provides superior strength against high winds.
- Two concentric sealing rims hold the 11mm Thermal Expansion Hole Cutter in place prior to drilling, and keep the expansion hole fully sealed after installation.
For fixing polycarbonate roof sheets to Steel
Product Code
BN4-SDHXPS12060C4
Specification
#12-14 X 60mm
Corrosion Resistance
True Australian Standard Class 4 Coating (C4)
SST 2000hrs + Kesternich 15 Cycles
Product Features
● Hex Washer Flange Head
● Integrated Depth Stop Knurls
● 11mm Expansion Hole Cutter
● Thunder Shot Self-Drilling Point
Steel Penetration
Max 4.5mm thick
Washer
Domed, Weatherseal, Anti-static EPDM Washer
Domed Structure: Superior strength against high winds.
Two Concentric Sealing Rims: Keeps the 11mm expansion hole fully sealed.
Adapter to use
Magnetic Hex Socket (5/16”)
For fixing polycarbonate roof sheets to timber battens
Product Code
BN4-T17HXPS1250C4
Specification
#12-11 X 50mm
Corrosion Resistance
True Australian Standard Class 4 Coating (C4)
SST 2000hrs + Kesternich 15 Cycles
Product Features
● Hex Washer Flange Head
● Integrated Depth Stop Knurls
● 11mm Expansion Hole Cutter
● Type 17 Needle Point
Timber Penetration
Min 25mm penetration
Washer
Domed, Weatherseal, Anti-static EPDM Washer
Domed Structure: Superior strength against high winds.
Two Concentric Sealing Rims: Keeps the 11mm expansion hole fully sealed.
Adapter to use
Magnetic Hex Socket (5/16”)
Compared to fixing metal roofing sheets, the biggest difference when fixing polycarbonate sheets is the high coefficient of thermal expansion rate. Common among most thermoplastics, allowances and extra spacing should be reserved on frames or purlins, and dedicated screws such as POLY-FAST™ and PolyXpand™ fasteners which create an expansion hole whilst drilling should also be used.
POLYF-FAST™ Polycarbonate roof fasteners save 50% of labor time – creates a perfectly round 11mm expansion hole, and fix sheets in one go.
A fool proof design for both beginners and professionals.
Installation Procedure:
- Press the drill point onto the corrugation crest.
- Use a lower RPM and tap in quick succession until the polycarbonate sheet is penetrated, and the drill point comes in contact with the wooden substrate.
- Continue to drill through the wooden substrate as you would with a standard Type 17 screw or TEK srew.
- The circular saw will penetrate the polycarbonate sheet and form a perfect expansion hole.
- Stop drilling when the domed EPDM conforms to the corrugation, which forms a weathertight seal.
Besides the polycarbonate roof screws, other article you may interested in >>
Polycarbonate Roofing Fixing Instructions: 8 Roof Fixing Tips
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