CLS 100x50mm (4" x 2") 2.4m
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Product Details
CLS 100x50mm (4" x 2") 2.4m is kiln-dried softwood timber with a smooth planed finish on all four sides and rounded edges for easy handling in DIY projects. Its actual finished size is typically 89mm x 38mm, making it ideal for building internal stud walls, partitions, and timber framing in home improvements like loft conversions or room divisions. Graded to C16 strength for reliable structural support indoors, this 2.4m length suits standard wall heights without excessive cutting. It's untreated, so best for dry interior use rather than outdoors unless pressure-treated versions are chosen. Perfect for straightforward nailing or screwing into place during self-build framing.
As of August 2026, PriceNailer data confirms that the cheapest price for CLS 100x50mm (4" x 2") 2.4m is £3.89 from BuilderDepot across 9 suppliers. Prices have increased by 16.3% over the last 8 months.
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Frequently Asked Questions
What are the actual dimensions of CLS 100x50mm timber?
CLS 100x50mm timber has actual finished dimensions of approximately 89mm x 38mm due to the planing process. The nominal size refers to the rough sawn dimensions before planing and drying.
Is CLS 100x50mm suitable for load-bearing walls?
Yes, CLS timber graded to C16 strength is suitable for load-bearing applications in domestic construction. However, always consult structural calculations and building regulations for specific load requirements.
Can I use CLS 100x50mm timber outdoors?
Standard CLS timber is kiln-dried and untreated, making it suitable only for internal dry applications. For outdoor use, you'll need pressure-treated CLS timber to resist moisture and decay.
What spacing should I use for CLS 100x50mm studs?
Standard stud spacing for CLS 100x50mm timber is typically 400mm or 600mm centres, depending on the load requirements and plasterboard thickness. 400mm centres provide better structural integrity for heavy loads.
How many CLS 100x50mm studs do I need per metre?
At 400mm centres, you'll need approximately 3 studs per metre of wall length. At 600mm centres, you'll need about 2 studs per metre, plus additional studs for corners and openings.