Screws for timber

Structural timber screws for modern timber construction

Structural timber screws are the backbone of contemporary timber engineering, transferring load between members in everything from domestic timber frame to large-scale CLT and glulam buildings. At TimbA Systems we supply the full Rothoblaas range of structural timber screws in the UK, backed by the technical support of a working structural engineering consultancy. Whether you are detailing a connection to Eurocode 5 or simply need reliable frame fixing screws for site, the right screw makes the difference between a connection that performs and one that merely holds.

Choosing the right structural timber screw

Not all timber screws are equal. Selection depends on the load path, the timber species and service class, and whether the screw is working in withdrawal, shear, or as reinforcement. Partially threaded screws draw two members tightly together, making them ideal for timber-to-timber lap joints and connector fixing. Fully threaded timber frame screws, by contrast, resist withdrawal along their entire length and are used to reinforce beams, secure notches, and strengthen joints loaded in tension. For exposed or high-humidity environments, coated or stainless structural timber screws protect against corrosion and meet the demands of service class 3.

Partially threaded vs fully threaded

A common question we are asked is when to use each thread form. As a rule of thumb, reach for a partially threaded screw when you need to clamp two pieces of timber together, because the smooth shank lets the head pull the upper member down onto the lower one. Choose a fully threaded screw when the joint is loaded in withdrawal or when you are reinforcing against splitting, since the thread engages the full depth of both members and resists pull-out far more effectively. Many structural details combine both, and our team is happy to advise on the correct mix.

Where structural timber screws are used

• Timber frame construction: wall plates, studs, and racking connections where timber frame screws carry repeated structural loads.
• CLT and glulam: panel-to-panel joints and beam reinforcement in mass timber, where long structural timber screws replace heavier traditional connectors.
• Roof and floor framing: fixing joists, rafters, and decking substructure with consistent, engineered pull-out values.
• Connector fastening: securing angle brackets, hangers, and hold-downs, where the screw's characteristic capacity governs the whole connection.

Why specify Rothoblaas structural timber screws

Rothoblaas screws are supported by European Technical Assessments and published characteristic values, which means the structural timber screws you buy from us can be designed into a connection with confidence rather than guesswork. For specifiers in the UK, that documented performance is essential for sign-off. Each screw geometry, from the self-drilling tip to the thread pitch and head form, is engineered to reduce splitting, speed installation, and deliver repeatable capacity. Using a fastener with a recognised approval also simplifies your design calculations, because the characteristic withdrawal and shear values are already established and traceable.

Technical support from a structural engineering team

What sets TimbA Systems apart from a general fixings supplier is that we are engineers as well as distributors. If you are unsure which structural timber screws suit your connection, how many fasteners a joint requires, or how to detail a withdrawal-loaded reinforcement, our team can advise. We help architects, engineers, and contractors specify the correct screw the first time, reducing waste and avoiding costly redesign on site.

Order structural timber screws in the UK

We hold core lines of structural timber screws in stock for next-day UK delivery, with the wider Rothoblaas range available on short lead times. Trade pricing is available for regular accounts, and every product page lists the sizes, drives, and pack quantities so you can order exactly what your project needs. Browse the range below, or get in touch for project-specific advice on timber frame screws, frame fixing screws, and reinforcement fasteners.