CLS Studwork Timber – C16 Kiln-Dried 3x2 & 4x2

Our CLS studwork timber is C16-graded, kiln-dried softwood with a planed finish and eased edges, available in 3x2 (38x63mm) and 4x2 (38x89mm) sizes and lengths from 2.4m to 4.8m. Manufactured to Canadian Lumber Standard (CLS) specifications for consistent sizing and stability, it is ideal for internal stud walls, partitions and roof framing, with a 3-5 working day lead time to mainland UK.

CLS Timber Sizes

CLS timber is sized to Canadian Lumber Standard, so the actual planed dimensions (38x63mm and 38x89mm) are slightly smaller than the nominal imperial size. The rounded corners and planed faces are standard CLS features.

Technical Specification

Common Uses

CLS studwork timber is widely used for internal stud wall framing, partition walls and door linings, roof trusses and loft framing, boxing in pipework, lightweight furniture framing and, when treated, sheltered structures such as sheds and fencing rails. Its consistent sizing and planed finish make it the standard choice for fast, accurate stud work.

C16 Grade and Kiln Drying

The C16 structural grade provides reliable strength for load-bearing applications, while kiln drying reduces moisture content to help prevent warping or shrinking after installation. The planed surfaces with eased edges allow safe handling and clean, accurate fitting.

Delivery Information

Lead times are currently 3-5 working days to mainland UK addresses. Longer lengths are bulky items, so suitable delivery access is required.

Frequently Asked Questions

What is 3x2 and 4x2 timber used for?
3x2 and 4x2 timber (38x63mm and 38x89mm) in C16 grade is used for internal stud walls, partitions, dry-lining frames and light framing. It is one of the most commonly specified timber sizes in UK construction.

What does C16 graded mean?
C16 is a structural strength grade under BS EN 338. C16 is suited to non-structural and light-duty applications like studwork and battens.

Is 3x2 and 4x2 timber pressure treated?
Yes. All our sawn treated timber is pressure-treated with preservative under high vacuum, forcing the treatment deep into the wood fibres. This protects against rot, fungal decay and insect attack for 15-25+ years depending on exposure. Suitable for outdoor and in-ground use.

What is the surface finish of 3x2 and 4x2 timber?
This timber is planed all round with eased (rounded) edges for a smooth, consistent finish. CLS is the standard choice for internal stud walls and partitions where a neat finish matters.

What lengths are available for 3x2 and 4x2 timber?
Check the variant options on the product page for the specific lengths available. Standard lengths are typically 2.4m, 3.0m, 3.6m and 4.8m depending on the section size.