7x2 Treated Timber

Some materials sit quietly behind the plasterboard. Others carry the entire structure without ever being seen. 7×2 treated timber belongs to the second category. It is the kind of timber chosen when strength is not negotiable, and the build needs to stay straight, stable and reliable for years.

Builders across the UK recognise this size immediately. It feels substantial in hand. It gives confidence before the first fixing goes in. Straight boards save time. Stable timber prevents future problems.

What is 175×47 treated timber?

175×47 treated timber is a structural softwood beam that has been precision machined and pressure treated to improve durability. The size refers to the finished dimensions in millimetres. This is the modern metric equivalent of the traditional 7×2 timber size used throughout the UK construction industry.

Pressure treatment protects the timber from moisture, rot and insect damage. The preservative is forced deep into the wood fibres. It does not sit only on the surface. This provides deeper protection within the timber. It increases durability. It ensures consistent performance over time. Even in conditions where untreated wood would weaken and deteriorate.

The finished section measures 47mm wide and 175mm deep. This profile provides the strength needed for structural framing while remaining practical to handle on-site. It is strength graded to C24 standard, which confirms consistent density and reliable load-bearing performance. The traditional imperial size is recognised as 7×2, a format still widely specified across UK construction drawings and plans. Standard lengths include 3600mm.

What is carcassing timber 47×175 used for?

It is commonly used as floor joists, the beams that support the floor from below. They carry a daily load and keep the floor solid. The same size is also used in roof joists and horizontal supports. It helps keep the roof straight and properly supported.

In timber frame builds, this timber is used to form the wall frame. It creates the structure that walls, openings and other elements are built around. In house extensions allow new structural sections to integrate properly with the existing building. This makes it easier to extend floor and roof lines without compromising strength.

It is used to build the main frame of garden rooms, sheds, workshops, summer houses and garages. It supports the external shell and gives the building its structural integrity.

Decking subframes use it to create a stable base that keeps boards level. Raised flooring systems depend on it to maintain alignment and strength. In lofts, it is often used to reinforce or upgrade the existing structure before new flooring is installed.

Benefits of 7×2 treated timber

• C24 grading confirms consistent strength and dependable performance.
• Suitable for structural use in both internal and external applications.
• Maintains a stable shape with reduced risk of twisting and distortion.
• Easy to cut, position, and install on-site.
• Standardised sizing ensures accurate framing.
• Long service life in structural applications.
• Trusted size widely used in UK construction.

Why choose our 7×2 C24 timber?

Sheet Materials Wholesale supplies 7×4 treated timber selected to meet those expectations from the moment it reaches your site.

Competitive prices help keep your project within budget. You can order a few lengths or pallet quantities depending on your needs. Larger orders benefit from volume discounts, helping reduce the overall cost of bigger builds.

You can order products online quickly and securely. The ordering process is designed for both trade professionals and homeowners working on structural builds. All timber is supplied from UK stock.

Fast UK delivery keeps projects moving. Materials arrive ready for installation, reducing downtime on site. Every order includes a VAT invoice, making documentation simple and clear.

Sheet Materials Wholesale keeps project-ready stock prepared for construction use. The timber arrives straight, properly graded and ready to perform from the moment it is installed.