Collection:Screws for wooden joists

Quick screwing, long-lasting hold, easy to install. Cobra stainless steel screws cover all your terrace projects: composite, softwood & hardwood, wood & aluminum joists.

A complete range of stainless steel screws

A durable terrace relies on suitable fixings. Cobrafastener stainless steel screws pass through hardwood, composite and aluminum without shifting thanks to their Torx sockets.

Compliant with DTU 51.4, they are available in several dimensions depending on your configuration: wooden or aluminum joists, exotic, resinous or composite wood slats.

Stainless steel screws for wooden joists

Made from A2 (304) stainless steel, these screws even penetrate hardwoods like ipe thanks to their perforating tip. The special shape of this tip, called "cut", facilitates penetration into dense exotic species. Countersunk head creates a flush surface when fastening is complete.

Several dimensions adapt to common blade thicknesses. The deep Torx recess integrated into the head limits bit rejection during screwdriving. The supplied bit ensures good tightening torque. On hard and exotic woods, pre-drilling remains mandatory, respecting a minimum distance of 2 cm from the edges to avoid splitting. This step improves the durability of the terrace.

Screws for aluminum and wood joists

Thanks to its perforating point, the screw passes through the blade then pierces the aluminum joist, ensuring solid anchoring without prior drilling. This versatility allows the same product to be used on wooden joists as well, simplifying the management of different projects. The special thread ensures good hold in these two materials.

Made from A4 (316), they are resistant to salty atmospheres and are suitable for installations by the sea or around swimming pools.

Several sizes are available depending on the thickness of the decking. Once screwed, the heads fit discreetly onto the terrace.

Colorful and discreet screws for composite boards

Available in different colors, these screws blend into the boards for an almost invisible fixing despite their visible installation. Their reduced-lobe concave head retains excess melt during screwdriving, creating a clean surface.

The double cylindrical thread constitutes the advantage of these fasteners: it reduces the rise of material, a frequent phenomenon with composites.

Available in several dimensions depending on the thickness of the decking. On dense composite wood (solid boards), pre-drilling improves the quality of anchoring and limits the risk of cracking.

What type of screw to choose for a wooden terrace?

On wooden joists, use A2 screws with countersunk heads. This type is suitable for standard exterior uses and passes through softwoods efficiently.

Dense species such as ipe or cumaru require screws with a perforating point which facilitates penetration without causing splitting.

For composite boards, opt for a double-threaded deck screw which limits the rise of material when screwing.

What length of terrace screw to choose?

The length is calculated simply: multiply the thickness of the boards by 2.5 to obtain good anchoring in the joist. 20mm thick boards require a 5x50 screw, while 24mm boards require a 5x60. For thicknesses of 28 mm, choose 5x70.

In a saline environment, prefer A4 screws, which are more resistant.

A perfect pose, quite simply.

The quality of a terrace depends on its installation. This is why, beyond our innovative bindings, we share our expertise : follow our guides and professional advice for simple, quick and flawless installation. With Cobrafastener, ensure impeccable and long-lasting results.

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