Decking Screws

About Decking Screws

Decking screws are specialised fasteners designed specifically for securing deck boards to joists and outdoor timber frameworks. Unlike standard wood screws, these purpose-built fixings feature corrosion-resistant materials, advanced thread patterns, and self-countersinking heads that deliver superior holding power whilst minimising timber splitting. MyToolShed.co.uk stocks premium decking screws from trusted manufacturers including Spax and ForgeFix, available in A2 and A4 stainless steel grades as well as anti-corrosion treated carbon steel variants.

These professional-grade fixings come with advanced drive systems such as Torx and Pozi heads that provide excellent torque transfer and reduce cam-out during installation. Available in various finishes including antique bronze, green anti-corrosion coatings, and natural stainless steel, they allow you to match your decking timber aesthetics whilst ensuring maximum durability against harsh British weather conditions.

Applications

• Landscape Gardeners – Building residential and commercial decking areas as part of garden design projects
• Carpenters and Joiners – Installing outdoor structures, pergolas, and timber frameworks requiring weather-resistant fixings
• General Builders – Incorporating decking into home extensions and renovation projects
• Decking Specialists – Professional contractors focused on deck construction and maintenance
• Property Maintenance Teams – Repairing or replacing public walkways and outdoor structures
• DIY Enthusiasts – Homeowners undertaking garden improvement and self-build decking installations

Choosing The Right Decking Screws

Material Selection: For standard UK gardens, green anti-corrosion treated or A2 stainless steel screws provide excellent longevity. Coastal locations or areas with high industrial pollution require A4 marine-grade stainless steel to prevent premature corrosion. Stainless steel also prevents black staining when used with tannin-rich hardwoods like oak.

Screw Length: For typical 28mm thick deck boards, choose 60-75mm long screws to achieve at least 40mm penetration into joists for structural integrity. Adjust length accordingly for thicker boards or when installing over joist tape.

Drive System: Torx drive systems offer significant advantages over traditional Pozi heads, particularly for large installations. The improved grip reduces cam-out, prevents driver wear, and speeds installation when using power tools.

Timber Compatibility: Modern decking screws from brands like Spax feature cutting points that eliminate pre-drilling in most softwoods. However, pre-drilling is recommended within 50mm of board ends, when working with hardwoods or composite materials, and in particularly dense timber to prevent splitting.

Frequently Asked Questions

Should I use stainless steel or coated carbon steel decking screws?

Quality anti-corrosion treated carbon steel screws offer excellent value for most UK applications, lasting 15-20 years in typical conditions. However, stainless steel is worth the investment for coastal locations, premium projects, or visible fixings where guaranteed longevity matters. MyToolShed.co.uk stocks both A2 grade for standard outdoor use and A4 grade for marine environments.

How many decking screws do I need per square metre?

Expect to use approximately 30-40 screws per square metre with standard 150mm wide boards on 400mm joist centres. Each board end requires 2 screws minimum, with additional fixings at each joist intersection. Always order 10-15% extra to account for wastage and future repairs.

What tools do I need to install decking screws?

An impact driver delivers significantly better results than standard drill drivers, providing superior torque and virtually eliminating cam-out when combined with quality Torx bits. For installations over a few square metres, a cordless impact driver from brands like Makita, DeWalt, or Milwaukee will transform the installation experience.