Check local branch stock
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Green Paling Fence Board Treated Rough Sawn Timber UC3u Unseasoned FSC 22 x 100mm (4x1)
Discover the robustness and sustainability of our Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22x100mm planks, perfect for supporting your outdoor projects. Crafted from responsibly sourced spruce/pine and fir, this timber upholds the full chain... -
Green Paling Fence Board Treated Rough Sawn Timber UC3u Unseasoned FSC 22 x 150mm (6x1)
Discover the unparalleled versatility and sustainability of our Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 150mm fencing boards. Crafted from FSC certified timber, with full chain of custody, you can be assured of environmentally conscious... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 100mm (4x2)
Discover the incredible strength and versatility of our C16 Timber Joists. These structural wood pieces are kiln dried and expertly pressure treated, making them resistant to wood-destroying fungi and ideal for both indoor and outdoor projects. With... -
Sawn Timber UC3u Treated Kiln Dried Regularised FSC 47 x 50mm (2x2)
Discover the versatility and resilience of our Rough Sawn Timber UC3u Treated Kiln Dried Regularised FSC 44x44mm (2x2). This timber is expertly treated to user classification 3 or UC3u, making it ideal for external use, providing it is used above... -
Green Slatted Treated Timber R4E Fence Screen Batten Redwood UC3 FSC 25 x 50mm
Introducing our Round Edge Redwood Planed Landscape Batten, expertly crafted from FSC certified timber, ensuring that you contribute to sustainable forestry with every project. This premium quality batten measures 25 x 50mm, providing the optimum size... -
C16 Timber UC3u Treated Kiln Dried Regularised FSC 47 x 75mm (3x2)
Due to the size of this 3x2 C16 graded timber carcassing, we recommended using it purely for vertical non-load bearing stud positions. C16 Timber Joists, expertly crafted for those who seek durability and reliability in construction projects. These... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 150mm (6x2)
Transform your outdoor spaces with our Timber Floor Joist, designed specifically for external use, making them perfect for decking joists. These robust timber joists are your go-to solution for projects requiring reliable structural support in... -
Green Paling Fence Board Treated Timber UC3u Unseasoned FSC 22 x 75mm (3x1)
UC3u Treatment Class Crafted from UC3u treated timber, these provide robust protection against rot and decay. Ideally suited for above-ground outdoor applications such as constructing pergolas and garden structures. UC3u is not recommended for a raised... -
Special Offer
Special OfferC24 Timber Decking Joists UC4 Treated Green Kiln Dried Regularised Redwood PEFC 47 x 150mm (6x2)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
Special Offer
Special OfferC24 Timber Decking Joists UC4 Treated Green Kiln Dried Regularised Redwood PEFC 47 x 100mm (4x2)
Our C24 timber joists are a perfect for supporting your decked area. This timber is UC4 treated, meaning that not only is it ideal for outdoor use, but it is also suitable for direct contact with the ground. C16 and C24 are strength grades; the higher... -
Green Paling Fence Board Treated Rough Sawn Timber UC3u Unseasoned FSC 22 x 200mm (8x1)
UC3u Treatment Class Crafted from UC3u treated timber, these provide robust protection against rot and decay. Ideally suited for above-ground outdoor applications such as constructing pergolas and garden structures. UC3u is not recommended for a raised... -
Special Offer
Special OfferC16 Timber Decking Joists UC4 Treated Green Incised Kiln Dried Regularised FSC 47 x 100mm (4x2)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 125mm (5x2)
C24 Graded Timber C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also... -
Green Paling Fence Board Treated Timber UC3u Unseasoned FSC 22 x 225mm (9x1)
UC3u Treatment Class Crafted from UC3u treated timber, these provide robust protection against rot and decay. Ideally suited for above-ground outdoor applications such as constructing pergolas and garden structures. UC3u is not recommended for a raised... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 200mm (8x2)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 225mm (9x2)
Treated timber is suitable to be used externally and is suitable for wet areas or areas where the timber will not be coming into contact with the ground. Examples of treated timber uses are outdoor decking, shed bases, posts, sleepers. Regularised... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 175mm (7x2)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
Special Offer
Special OfferC16 Timber Decking Joists UC4 Treated Green Incised Kiln Dried Regularised FSC 47 x 150mm (6x2)
C16 deck joists are perfect for supporting your decked area. This timber is UC4 treated, meaning that not only is it ideal for outdoor use, but it is also suitable for direct contact with the ground. C16 graded timber is home grown conifer timber such... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 100mm (4x3)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 150mm (6x3)
C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 175mm (7x3)
These C16 carcassing timber lengths are UC3u treated timber, meaning they perfect for outdoor use providing it is above ground. Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 200mm (8x3)
These C16 carcassing timber lengths are UC3u treated timber, meaning they perfect for outdoor use providing it is above ground. Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form... -
C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 225mm (9x3)
These C16 carcassing timber lengths are UC3u treated timber, meaning they perfect for outdoor use providing it is above ground. Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form... -
Green Treated Timber Fence Post 4-Way Diamond Top Tanalised FSC 200 x 200 x 3000mm
A strong and dependable choice for structural outdoor applications, this heavy-duty sawn timber post offers lasting performance and a clean, traditional look. Pressure-treated for enhanced protection against decay and weathering, it is ideal for fencing,...
Rough Sawn Timber
What is Structural Carcassing Timber?
Often referred to as carcassing timber, this type of wood is most commonly used in structural applications that involve the timber being used in an area that won’t be seen, and typically comes in three gradings:
- C16 Timber
- C24 Timber
- Part Graded Timber
Do I need Treated Structural Timber?
If the timber is going to be placed in an area where attacks from external problems such as moisture or fungal attacks, are likely to cause major problems, then we strongly recommend purchasing treated structural timber.
For all the following applications, we generally recommend using a treated structural timber:
- Roof Rafters
- Timber Framing
- Ceiling Joists
- Floor Joists
- Deck Joists
I need a Sawn Finish Structural Timber
Sawn Carcassing Timber has largely been replaced in UK stockists with “eased edge” stock being introduced in the UK in 2004.
Eased Edged means that the timber is semi-surfaced and finished to a uniform finish that is relatively smooth. Four corners are radiused to reduce the likelihood of splinters.
Most of our branches do hold stock of sawn boards that are either treated or untreated. However, if you require a sawn unsurfaced finish, please contact your nearest branch, who will be able to source this as a special item to meet your requirements. Most sizes can be obtained within 5 to 10 working days.
Confused about C16 and C24 structural timber and which grade you will need? Your nearest branch will be more than happy to help.