Timber Decking Done Right: Why SIHGA Fixings Make All the Difference

Timber decking continues to be one of the most popular ways to transform outdoor spaces, offering a natural, warm aesthetic that complements both modern and traditional homes. But whilst the choice of timber often gets the spotlight, the fixings you use are just as critical to the long-term performance, appearance, and safety of your deck.

This is where SIHGA’s innovative fixing systems stand out. Designed with precision engineering and durability in mind, products like the JustiFix®, TefaFix®, SenoFix FT® and L-BohrFix® A4 offer reliable, professional solutions that elevate any decking project.

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Why fixings matter more than you think

Poor-quality or incorrect fixings can lead to a range of issues over time:

• Splitting timber.
• Visible screw heads ruining the finish.
• Movement and instability.
• Corrosion and staining.

High-performance fixings don’t just hold your deck together: they protect your investment, enhance the visual finish, and reduce maintenance over time.

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JustiFix® II JK: A solid foundation for decking installation

Strong decking starts with a properly supported and level substructure. JustiFix® II JK is designed to create a stable, adjustable base between your substructure and the ground.

What are the key benefits?

• Wide height adjustment range: Typically, from 30mm up to 545mm depending on configuration.
• Integrated slope compensation: Automatically adjusts for gradients up to 3%.
• High load capacity: Supports up to 6.0kN per foot for dependable structural performance.
• Improved ventilation: Lifts the substructure off the ground to prevent moisture build-up and prolong the timber’s lifespan.
• Time-saving installation: Can reduce installation time by up to 70% compared to traditional solutions.

The system also integrates seamlessly with substructure solutions like TefaFix® and SymbioFix®, clicking securely into place for added stability.

In short, JustiFix® II JK ensures your decking is perfectly level, well-ventilated and built to last.

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TefaFix®: Built for substructure reliability

A deck is only as strong as its substructure, and this is where TefaFix® excels.

What are the key benefits?

• Secure structural connections: Ideal for joists and load-bearing elements.
• High load capacity: Engineered for stability and durability.
• Efficient installation: Designed to speed up on-site installation.
• Long-term performance: Minimises movement and loosening over time.
• Optimised force transfer: Ensures loads are evenly distributed across the substructure.

Using the right fixings below the surface ensures your deck remains solid, safe and level for years to come. When paired with JustiFix® II JK, it creates a robust and fully integrated substructure system.

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SenoFix® FT: Hidden strength, clean finish

If you’re aiming for a sleek, fixing-free finish on your decking, SenoFix® FT is the perfect way to achieve this – without the need for additional clamps or belts.  

What are the key benefits?

• Hidden fixing system: Creates a flawless, uninterrupted surface.
• Prevents splitting: Designed to work with timber movement rather than against it.
• Consistent spacing: Ensures even 7mm gaps between boards for drainage and expansion. As well as 8mm spacing from the substructure.
• Time-saving installation: Only 1 screw per attachment point. Requires 50% less installation time and provides perfect grip.
• Enhanced board longevity: Reduces surface damage and exposure, helping extend the life of the decking boards.

This system is ideal for homeowners and installers who want a premium aesthetic without compromising structural integrity.

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L-BohrFix® A4 screws: Precision meets durability

When working with hardwoods or dense timber species, standard screws often struggle. L-BohrFix® A4 screws are specifically engineered to overcome these challenges.

What are the key benefits?

• Integrated drill tip: Reduces the need for pre-drilling.
• A4 stainless steel: Exceptional corrosion resistance, perfect for outdoor pool areas and coastal environments.
• Clean countersinking: Leaves a neat, professional finish.
• High strength: Reliable fixing even in the toughest timbers.
• Reduced splitting and surface damage: Ensures cleaner installation and preserves the timber’s aesthetic.

Whether you’re working around a pool, in coastal locations, or simply want long-lasting performance, L-BohrFix® A4 screws deliver both strength and peace of mind.

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The SIHGA advantage

What sets SIHGA fixings apart is their focus on system-based solutions. Rather than offering generic systems, they provide purpose-built products that work together to improve:

• Installation speed.
• Structural integrity.
• Visual appeal.
• Longevity of your decking.

Beautiful timber decking isn’t just about the boards you choose, it’s about how everything is fixed together. By investing in high-quality solutions like JustiFix®, TefaFix®, SenoFix® FT and L-BohrFix® A4 you’re ensuring a professional finish that lasts – because in decking, it’s what you don’t see that often matters most.

Want to learn more about using SIHGA® accessories? Get in touch with our technical team.