Treated Sawn Reg Timber C24 Graded 47mm x 100mm (4x2)

Treated sawn C24 graded timber in 47mm x 100mm (4x2) is a structural softwood suitable for floor joists, roof rafters, stud walls and decking subframes. Kiln dried and Tanalised pressure treated for durability, it meets BS 4978 strength grading requirements and current building regulations for structural softwood.

Specifications

What it's used for

• Floor joists and structural floor frameworks in new build and renovation projects
• Roof rafters, ceiling joists and general roof structures
• Timber stud walls and internal partition framing
• Decking subframes and outdoor structural bases where preservative treatment is required

Fitting and handling

Store timber flat and off the ground on bearers, covered and well ventilated, to prevent warping before installation. Kiln dried to 20% moisture content or below, this timber is ready for most site conditions, though allowing a short acclimatisation period in the working environment will further reduce on-site movement. Use hot-dip galvanised or stainless steel fixings with Tanalised timber to avoid corrosive reactions with the preservative treatment.

FAQ

Is C24 graded timber suitable for structural use under UK building regulations?

Yes. C24 is a structural strength grade to BS 4978 and is widely accepted for load-bearing applications including floor joists and roof rafters under current UK building regulations. Always consult your structural engineer or building control officer for project-specific requirements.

Can I use Tanalised 4x2 timber outdoors?

Yes. Tanalised pressure treatment makes this timber suitable for exposed above-ground applications such as decking subframes and outdoor structures. The preservative treatment protects against rot and insect attack, extending the service life of the timber significantly compared with untreated softwood.

Browse the full range of C24 graded timber at Nottage Timber Merchants. We supply trade and retail customers across Bridgend and South Wales, with next-day delivery available to many local postcodes. Contact us for volume pricing and cut-to-length options.