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9x2 Timber Treated (5 Products)

9x2 treated C24 timber outshines lower grades of timber (such as C16) in both its strength and durability; the higher the grade, the greater its strength and load-bearing. 9x2 C24 timber's composition comprises considerably fewer physical defects and knots. Applicable in structural applications such as flooring joists, roofing, as well as timber frame stud walls, our 9x2 sawn timber range is sawn to length and pressure-treated with chemicals to prevent insect attack and fungal decay.

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9x2 Timber Treated


9x2 carcassing timber is perfect for first-fix structural applications such as floor joists, roof joists, and timber framing construction.

We recommend 9x2 carcassing timber for the following applications: 

  • Stud walls

  • Joists - roofs, floors and decking

  • Structural and general joinery applications

  • Timber framing construction


We stock 9x2 timber in lengths of 3.6m, 4.2m, 4.8m, 6m and 7.2m - these are also available for delivery in packs of 55.


It's not just building materials that we sell, however, we also stock a collection of accessories (such as wood screws) to help you get your project underway. 


Should you require a different size, we stock a huge range of sizes and metre lengths of timber to accommodate your project needs.

9x2 Timber Specifications


  • Stress graded to a superior C24 standard - excellent tensile strength
  • Planed on all four sides with rounded edges - easy handling
  • High-density
  • Pressure treated with Tanalith 'E' - helps to prevent rot and protect from moisture 
  • Kiln dried to remove moisture 
  • FSC Certified - responsibly sourced 


Please note: timber is a natural product that may vary in colour, visual details, knots, grain, and texture.

What Does C24 Grade Mean?


The C stands for conifer, the type of tree that the timber comes from, while the 16 and 24 refer to the strength grade. 

Factors taken into account include when assessing a timber grade are: 

  • Knots 
  • Splits along the grain 
  • The slope of the grain 
  • Woodworm holes 

How Does C24 Timber Outperform C16 Timber? 


C24 grade offers a stronger, more robust product than lower-graded timbers such as C16. This is due to the fact it comprises considerably fewer knots and has a tighter grain. 


It is this increased strength which ensures C24-graded timber is able to deliver in structural applications that require durability and sturdiness. 


C16 timber is more budget-friendly than other grades because it often features a few imperfections, such as grain deviations that can weaken the wood or cosmetic damage like sap stains and uneven surfaces.

C24 timber does not have this same issue and is particularly efficient at bearing heavy loads and spanning wider areas. 

Why Choose Treated Timber? 


Without treatment, timber is generally quite a vulnerable material. Not only is it susceptible to moisture damage but it is also prone to weaken with weathering and insect attack. Treated timber, on the other hand, is treated with chemicals and preservatives to prolong its lifespan. 

Here are just a handful of the benefits on offer with treated timber:  

  • It is treated to resist rot, decay and insect attacks
  • The most durable timber option which offers extra stability, making it ideal for outdoor use
  • Thanks to its treated nature, treated timber is also low-maintenance
  • You won't have to spend time and money regularly maintaining it

What Does Pressure Treated Mean? 


Pressure-treated wood goes through a process chemical infusion process to create a more durable and long-lasting product.


It's imperative to remember that while this type of treatment helps prevent rot and insects, weathering and corrosion are still possible over time.

Frequently Asked 9x2 Questions

What Is A First-Fix Construction?


In construction, the term 'first-fix' essentially entails the construction work required to take a structure from its foundation to the stage of applying internal surfaces - typically the plastering of internal walls.

Can I Trust The Grade of The Timber If I Cannot See A Printed Mark? 


Only use timber that has a C16 or C24 mark visible! If you can't see the mark, then the quality is likely not up to par.

How Is Timber Sized On Materials Market?


Here at Materials Market, we list timber sizes in a couple of different ways. Timber lengths are usually referred to in imperial terms (inches rather than millimetres) and are characterised by their width and height. The most popular way we refer to size is in inches like '7 x 2' but we also use metric, which measures in millimeters (mm).


For 7 x 2 timber this would be 175mm x 50mm or 47mm x 175mm. We sell 47mm x 175mm on this website and this is used interchangeably with 7 x 2 to refer to the same size of product. The slight discrepancy of 3mm between 47mm (finished size) and 50mm (nominal size) just means that the finish at the ends is a lot more even and easier to work with.


Whatever your project, our site is proud to present a wide range of standard sizes for easy fitting; offering timber products that will be of interest to both new and seasoned builders.

Can You Burn Pressure-Treated Wood?


Under no circumstances should pressure-treated wood be set alight. The fumes released when pressure-treated wood burns can be harmful to health and the ash itself is toxic.

We advise against using pressure-treated wood for making any form of food preparation surface due to this toxicity.

Is It Possible To Paint 9x2 Timber C24?


Pressure-treated wood can be painted or stained, but to get a finish that lasts and looks premium, you'll first need to evaluate the moisture content of the timber.

Once you are sure the timber is dry, you can then move on to using a suitable primer and paint finish. We recommend using a latex primer with compatible exterior latex paint—water-based paint. Oil-based paints are not recommended.

How Should I Store 9x2 Treated Timber? 

C24 timber should be stored indoors away from direct sunlight to prevent timber shrinkage/expansion. 

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