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132-263 264+ £2.50£3.00 £2.45£2.94 
47 x 50mm Treated Carcassing Timber (2” x 2”) 2400mm
Our C16 graded 2×2 timber that stays straight and strong, it is kiln dried and minimises movement. The pressure treatment resists rot and pests. It comes from a slow-grown softwood, which means a smoother finish, excellent stability and robust load performance.
£2.58£3.10 Ex VATInc VAT£1.08£1.30 Per M Add to cart -
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168-335 336+ £2.97£3.56 £2.91£3.49 
38 x 63mm CLS Sawn Timber C16 Graded (3” x 2”) 2400mm
C16 CLS 3×2, is kiln-dried for controlled moisture and straightness. Sanded all round with soften edges on the timbers for less risky and easier operations. CLS 38mm x 63mm is reliable for stud walls, overall wall framing and floor lining, stable and ready for a variety of both; non-structural and structural use.
£3.06£3.67 Ex VATInc VAT£1.28£1.54 Per M Add to cart -
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90-179 180+ £3.58£4.30 £3.51£4.21 
47 x 75mm Treated Carcassing Timber (3” x 2”) 2400mm
Our C16 graded 3×2 timber that stays straight and strong, it is kiln dried and minimises movement. The pressure treatment resists rot and pests. It comes from a slow-grown softwood, which means a smoother finish, excellent stability and robust load performance.
£3.69£4.43 Ex VATInc VAT£1.54£1.85 Per M Add to cart -
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224-447 448+ £3.94£4.73 £3.82£4.58 
38 x 89mm CLS Sawn Timber C16 Graded (4” x 2”) 2400mm
C16 CLS 4×2, is kiln-dried for controlled moisture and straightness. Sanded all round with soften edges on the timbers for less risky and easier operations. CLS 38mm x 89mm is reliable for stud walls, overall wall framing and floor lining, stable and ready for a variety of both; non-structural and structural use.
£4.15£4.98 Ex VATInc VAT£1.73£2.08 Per M Add to cart -
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66-131 132+ £4.70£5.64 £4.61£5.53 
47 x 100mm Treated Carcassing Timber (4” x 2”) 2400mm
Our C24 graded 4×2 timber that stays straight and strong, it is kiln dried and minimises movement. The pressure treatment resists rot and pests. It comes from a slow-grown softwood, which means a smoother finish, excellent stability and robust load performance.
£4.85£5.82 Ex VATInc VAT£2.02£2.42 Per M Add to cart
C16 Timber 2400mm
Every build starts with a decision about what will actually hold everything together. C16 timber is chosen when you need wood that behaves properly once fixed in place and does not surprise you later. Walls stay straight. Floors feel solid. Joists do their job quietly. Builders trust it, and homeowners rely on it.
What is Timber C16?
Timber C16 is strength-graded structural softwood that has been properly tested. The C16 grade tells you how the wood performs under load. How stiff it is. How predictable it will be once installed. It is typically kiln-dried to reduce movement after fixing. C16 wood is widely available across the UK because it suits real builds. Stud walls, floors, and roof structures. Everyday construction where reliability matters more than perfect looks. When treated C16 timber also gains protection against moisture, rot and decay. That makes it suitable for both internal framing and external projects where durability is essential. Simple material. Clear purpose. Proven performance.
What is C16 timber used for?
C16 timber is used where structure comes first. Across homes, gardens and commercial builds. Inside the house, it is a standard choice for stud walls, partitions and floor joists. C16 joists provide dependable support for floors that need to feel firm under daily use. No bounce. No movement.
In lofts and roofs, timber C16 works well for rafters and framing where loads are known and properly calculated. Straight lengths help speed up installation and reduce waste on site.
Outside, treated C16 timber is widely used in gardens. Decking frames, pergolas, BBQ zones, play areas, raised platforms, garden rooms and sheds. It handles damp conditions when installed correctly and kept off standing water.
Whether you are building a family garden space or managing a larger site, C16 timber gives you flexibility without overcomplicating the job.
Types of C16 timber joists
C16 timber joists are available in a wide range of sizes to suit different structural needs. The idea is simple. Lighter sections for smaller builds. Deeper sections require more support.
Common thicknesses range from 50mm to 100mm. Deeper sections are chosen for floor structures, longer spans and areas where load matters more. Imperial sizes including 2×2, 3×2 and 4×2 are commonly used on UK sites, making planning, cutting and fixing straightforward. Widths are usually 38mm or 47mm, which align with standard UK construction practices. C16 timber joists are supplied in practical lengths, including 2400mm, 3000mm and 3600mm. This helps reduce joints, minimise waste and keep structures cleaner and stronger once installed.
Both untreated and moisture resistant options are available. Untreated joists suit dry internal environments. Treated C16 timber is the better choice where there is exposure to damp conditions or where added protection gives peace of mind.
Benefits of C16 joists
- Predictable structural performance once installed.
- Suitable for a wide range of standard UK builds.
- Strength graded for reliable load handling.
- Consistent sizing for easier planning and fixing.
- Available in multiple depths and lengths to match the project.
- Works well with standard fixings, insulation and flooring systems.
- Straightforward to cut, position and install on site.
- Treated options available for added protection in damp conditions.
Why choose our timber C16?
If you are choosing C16 timber, you already know what matters. Straight stock. Reliable grading. No surprises on site. At Sheet Materials Wholesale, timber C16 is priced for real projects, not just single purchases. We offer competitive prices and value for money, with trade discounts and bulk or volume pricing available.
You can buy C16 timber online. We provide nationwide delivery across the UK, with fast UK delivery and next-day delivery available on selected products. Orders can be sent by kerbside delivery to the site or home, or collected using Click & Collect, where timing is critical. Order tracking is included as standard.
Sheet Materials Wholesale is a trusted supplier of C16 timber, supplying both trade and DIY customers from UK stock. All timber is supplied with a VAT invoice. If you need to check quantities or pricing, we offer quotes in minutes, keeping decisions moving.
For larger requirements, you can purchase bulk orders, access volume discounts, and arrange site or residential delivery with ease. Request a fast quote, secure trade pricing, and source C16 timber with confidence.
FAQ
Can you paint C16 timber?
C16 timber can be painted once it is dry and properly prepared. For external projects, use a suitable exterior primer followed by a weather-resistant paint.
Can you use C16 timber for decking?
C16 timber is suitable for decking frames and supporting structures when treated for external use. C16 joists are commonly installed beneath decking boards, provided correct spacing, ventilation and drainage are allowed. Decking boards themselves are usually specified separately.
How to treat C16 timber for outdoor use?
If C16 timber is being used outside, it must be pressure treated. Treated C16 timber is designed to resist moisture and decay, but exposed cut ends should always be resealed. Keeping the timber raised off the ground and allowing water to drain freely will help it perform better over time.
Where to buy C16 timber?
C16 timber is available to order online from Sheet Materials Wholesale, including next-day delivery on selected products.