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4x2 CLS Timber

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Actualise your framing visions with 4x2 C16 CLS Studwork Timber. This type of timber, also known as Canadian Lumber Standard Timber (a set of regulations and grading standards to assess timber quality in Canada) is simply indispensable when it comes to constructing internal walls and partitions. Kiln dried for extra stability and sourced from slow-grown FSC-certified softwood, C16 timber is the most commonly used form of timber due to its affordability and versatility. 

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What Is 4x2 CLS Timber?

If you're looking to build something that's going to last, 4x2 CLS timber is a must-have in your arsenal. This type of softwood timber has been carefully selected and planed smooth on all four sides, ensuring a high-quality finish that's both strong and sturdy. And with its C16 grade rating, you can be sure that it meets the strict strength and stiffness requirements laid out by the UK's TRADA grading rules.


The "4x2" size refers to the nominal finished size of the timber while the "CLS" refers to Canadian Lumber Standard.

This timber is often kiln-dried to reduce its moisture content and increase its stability, making it less likely to warp or twist over time.


Overall, 4x2 CLS timber C16 grade is a reliable and versatile choice for a wide range of building and internal DIY projects.

4x2 CLS Timber Key Features & Benefits

  • FSC certified softwood
  • Nominal Size: 50mm x 100mm (4" x 2")
  • Finished Size: 38mm x 89mm (3.5" x 1.5")
  • Length: 2.4m, 3m and 4.8m
  • Ideal for interior framing and carcassing applications
  • Rounded edges and planed on all four sides - easy to handle
  • Kiln dried for extra stability
  • Slow-grown to ensure stable composition
  • Not suitable for direct ground contact due to its natural tendency to expand and contract
  • As a natural product, timber can be affected by changes in temperature and humidity

4x2 CLS Timber Applications

If you're looking for a reliable and flexible material for your interior construction projects, look no further than 4x2 CLS timber. This building material is an excellent choice for framing and carcassing, providing a sturdy foundation for all sorts of structures - from simple partitions to more complex frames. 


With its versatility and ease of use, 4x2 CLS timber is the perfect solution for anyone looking to make the most of their interior space.


For all other timber products that we supply, please refer to our Timber & Sheet homepage. For other product categories such as insulation, sheet materials, or products of a particular brand, please navigate our handy headings on the Materials Market homepage.


For product information and further details, please refer to individual product pages and datasheets (if applicable). 

What is C16 Timber?

C16 graded timber is a type of softwood that is graded for use in construction. The “C” in C16 stands for “conifer,” while the “16” refers to the timber’s strength.


C16 timber has a minimum strength of 16 N/mm², which means it can handle a certain amount of weight or load. This type of timber is commonly used in building projects such as roofing, flooring, and wall framing.


C16 timber is typically made from softwood species such as spruce, pine, and fir. It is known for its good quality and durability, making it a popular choice for construction projects. C16 timber is also known for its affordability, making it a great option for those on a budget.


The most common application for C16 timber is for internal construction projects, including wall, floor and roof joist applications.

Frequently Asked 4x2 CLS Questions

What's The Difference Between Treated Timber And Non-Treated Timber?

When it comes to choosing the right type of timber for your construction project, it's important to consider the benefits of both treated and untreated wood. While untreated timber is a natural and eco-friendly option, it may not be as durable or resistant to pests and rot as treated wood. 


At Materials Market, we supply pressure-treated timber that has been treated with preservatives and kiln-dried to ensure maximum durability and protection. 


Our tanalised timber is not only long-lasting but also planed all around, making it easy to handle and work with. 

Is 4x2 CLS Timber Suitable For Outdoor Use?

No, 4x2 CLS timber is not recommended for outdoor use or direct ground contact. It is best suited for interior applications such as studwork, partitioning, and joinery.

How Does 4x2 CLS Timber Compare To Other Types of Timber?

4x2 CLS timber stands out from other softwoods for its remarkable sturdiness, stability and ease of use. Its polished finish and superior grading make it a favourite amongst builders as well as DIY enthusiasts.

What Are Some Creative Uses For 4x2 CLS Timber?

In addition to its more traditional uses in construction and joinery, 4x2 CLS timber can be used in a variety of creative ways. For example, it can be used to make furniture, shelving, or decorative wall features.

How Can I Ensure That My 4x2 CLS Timber Is Of Good Quality?

To ensure that you are getting high-quality 4x2 CLS timber, look for reputable suppliers who offer timber that is kiln-dried and graded to meet industry standards. Also, be sure to inspect the timber for any cracks, knots, or other defects before using it.

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