The One Shot Timber Screws Laserlite 50 mm are purpose-built fasteners for fixing polycarbonate roofing and cladding sheets to timber rafters or battens. Supplied in a handy pack of 50, they combine speed of installation with long-term weather resistance, making them the ideal companion for Laserlite multiwall, corrugated and greca profiles.

Each screw features a patented cutting wing and drill point that forms a clearance hole through the polycarbonate sheet as it drives into the timber below. This single-step action removes the need for pre-drilling and ensures the hole is perfectly sized to allow thermal expansion and contraction of the sheet, preventing stress cracks around the fixing point.

Key features

Attribute	Detail
Length	50 mm
Gauge	#12 (approx. 6.3 mm)
Head style	5/16″ hex with captive sealing washer
Washer	29 mm clear polycarbonate backed by UV-stable EPDM
Drive material	Hardened carbon steel
Protective finish	Class 4 corrosion-resistant coating to AS 3566
Pack size	50 screws

Performance benefits

Time-saving installation – drill, countersink and seal in a single drive.
Weather-tight seal – oversized polycarbonate/EPDM washer compresses uniformly, keeping water out and allowing sheets to flex naturally.
Superior grip in timber – coarse Type 17 thread cuts its own path for high pull-out strength.
Long-life coating – engineered for exposure in coastal and industrial environments without red rust.

Variations available

Although this pack contains the popular 50 mm length suited to most single-sheet roofing jobs, complementary One Shot screws are available in 65 mm and 75 mm for insulated or multi-layer assemblies. All lengths share the same head, washer and protective finish, ensuring visual and structural consistency across a project.

Typical uses

Pergolas, verandas and patio roofs
Greenhouses and nursery shelters
Carports and covered walkways
Transparent wall cladding where sheets meet timber framing

Installation guidance

Position the sheet and align with purlins or rafters.
Drive the screw perpendicular to the surface until the polycarbonate washer just begins to compress—do not over-tighten.
Space fixings at sheet peaks every 300 mm on edges and every second corrugation on internal supports.
Remove any swarf or debris to maintain optical clarity.

For a professional, leak-free finish on every polycarbonate roof, choose the One Shot Timber Screws Laserlite 50 mm pack from Singh Roofing Supplies—engineered to save time today and protect your installation for years to come.