Screws and connectors for decks

Timber decking screws and concealed deck connectors

Timber decking screws and connectors are what hold a deck together and keep it looking good for years, so they deserve as much thought as the boards themselves. At TimbA Systems we supply the Rothoblaas range of decking screws and connectors in the UK, from stainless steel deck screws for hardwood and coastal projects to concealed fastening systems that leave the deck surface completely clean. Whatever the substructure and board material, we can help you specify a fixing that lasts.

Choosing timber decking screws

Decking lives outdoors, so corrosion resistance is the first consideration. Stainless steel deck screws are the gold standard for hardwood, tropical timbers, and coastal or high-humidity sites, where lesser fixings stain the board and fail early. Coated carbon-steel decking screws suit softwood and treated timber decks where exposure is less severe. Head type matters too: countersunk screws sit flush in the board, while concealed connectors remove visible fixings altogether for a premium finish.

Concealed fastening and deck connectors

Concealed deck connectors clip into grooved boards and fix down to the joist, hiding the fastener and creating consistent gaps for drainage and ventilation. This protects the timber by letting water and air move freely beneath the board, reducing the cupping and rot that come from trapped moisture. For grooveless boards, surface-fixed stainless steel deck screws remain the reliable choice, and we stock colour-matched options so the fixings disappear into the board.

Protecting the substructure

A deck is only as durable as the joists beneath it. Joist protection tape applied along the top of each bearer shields the timber from standing water at every fixing point, dramatically extending substructure life. Combined with the right timber connectors and a ventilated build-up, it is the single most cost-effective upgrade you can make to a deck's longevity.

Typical decking applications

• Hardwood decks: stainless steel deck screws that resist staining and corrosion in dense timbers.
• Softwood and treated decks: coated decking screws for everyday garden and patio projects.
• Premium finishes: concealed connectors and timber connectors for a fastener-free surface.
• Substructure: joist protection tape and substructure screws for a longer-lasting frame.

Fixing centres and board movement

Timber and composite boards expand and contract with temperature and moisture, so decking screws and connectors must allow for that movement while holding the board secure. As a general guide, fix boards at every joist crossing and keep consistent gaps between boards for drainage and airflow. Concealed connectors handle this automatically by setting a fixed gap, while surface-fixed stainless steel deck screws give you control over placement on site. Getting fixing centres and gaps right is what prevents cupping, squeaks, and popped fixings down the line.

Why specify Rothoblaas decking screws

Rothoblaas decking screws and connectors are engineered for outdoor durability, with corrosion-resistant coatings and stainless grades matched to real service conditions. The concealed systems are designed around board geometry for consistent spacing and quick installation, saving time on site. As a structural distributor with engineering expertise, we can advise on fixing centres, board movement, and the right combination of timber decking screws and connectors for your build.

Order decking screws in the UK

Core decking lines are held in stock for next-day UK delivery, with trade pricing for regular accounts. Each product page lists sizes, finishes, and pack quantities so you can order the right fixings in the right quantity. Browse our timber decking screws, stainless steel deck screws, and concealed connectors below, or contact our team for advice on your project.