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![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 150mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 150mm")
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 150mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 150mm")
C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 150mm
Treated C24 is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. The use of C24 grade timber, which has a smaller cross section, allows for higher loads, and longer spans. C24 grade has fewer... -
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm")
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm")
C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm
Treated C24 is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. The use of C24 grade timber, which has a smaller cross section, allows for higher loads, and longer spans. C24 grade has fewer... -
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 200mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 200mm")
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 200mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 200mm")
C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 200mm
Treated C24 is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. The use of C24 grade timber, which has a smaller cross section, allows for higher loads, and longer spans. C24 grade has fewer... -
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 220mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 220mm")
![C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 220mm]( "C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 220mm")
C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 220mm
£16.68 - £95.92 per piece (Ex VAT)£20.02 - £115.10 per piece (Inc VAT)Treated C24 is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. The use of C24 grade timber, which has a smaller cross section, allows for higher loads, and longer spans. C24 grade has fewer... -
![Green Treated UC3u Unseasoned Rough Sawn Timber FSC 22 x 150 x 1800mm]( "Green Treated UC3u Unseasoned Rough Sawn Timber FSC 22 x 150 x 1800mm")
![Green Treated UC3u Unseasoned Rough Sawn Timber FSC 22 x 150 x 1800mm]( "Green Treated UC3u Unseasoned Rough Sawn Timber FSC 22 x 150 x 1800mm")
Green Treated UC3u Unseasoned Rough Sawn Timber FSC 22 x 150 x 1800mm
Green Treated Fence Boards 1.8m are pressure treated to ensure durability and prevent rot and are ideal to create a traditional boarded fence. This fence board may be used to support a row of wooden fence panels. Our fencing panels are available in a... -
![Rough Sawn Timber Kiln Dried Regularised FSC 47 x 50mm]( "Rough Sawn Timber Kiln Dried Regularised FSC 47 x 50mm")
Rough Sawn Timber Kiln Dried Regularised FSC 47 x 50mm
£2.09 - £12.01 per piece (Ex VAT)£2.51 - £14.41 per piece (Inc VAT)Carcassing is a generic trade term term meaning the timber is used to form floors, walls, ceilings and roofs of properties. All our timber has full chain of custody, meaning our timber is sourced responsibly. It is kiln dried to minimise moisture content... -
![Rough Sawn Timber UC2 Treated Type A 25 x 38mm]( "Rough Sawn Timber UC2 Treated Type A 25 x 38mm")
Rough Sawn Timber UC2 Treated Type A 25 x 38mm
£1.33 - £3.55 per piece (Ex VAT)£1.60 - £4.26 per piece (Inc VAT)This UC2 treated carcassing has a rough sawn finish, which is pressure treated to prolong timbers lifespan and protect rot or insect attack. This non- structural softwood is ideal for construction projects. This product has FSC certification and full... -
![Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 125mm]( "Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 125mm")
![Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 125mm]( "Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 125mm")
Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 125mm
£2.46 - £12.10 per piece (Ex VAT)£2.95 - £14.52 per piece (Inc VAT)Treated timber is suitable to be used externally and is suitable for wet areas or areas where the timber will be coming into contact with the ground. Examples of treated timber uses are outdoor decking, shed bases, posts, sleepers. -
![Scaffold Board Timber Banded Both Ends PEFC 36 x 225 x 3000mm]( "Scaffold Board Timber Banded Both Ends PEFC 36 x 225 x 3000mm")
![Scaffold Board Timber Banded Both Ends PEFC 36 x 225 x 3000mm]( "Scaffold Board Timber Banded Both Ends PEFC 36 x 225 x 3000mm")
Scaffold Board Timber Banded Both Ends PEFC 36 x 225 x 3000mm
Our 38 x 225 Scaffold Board, are timber planks that are perfect for access platforms and walkways are straight and sturdy with a steel band on both ends. This board is made from responsibly sourced wood that is PEFC Certified and holds a Full chain of... -
![Tapered Timber Firring for Flat Roofs 67mm to 3mm PEFC 47 x 75 x 4200mm]( "Tapered Timber Firring for Flat Roofs 67mm to 3mm PEFC 47 x 75 x 4200mm")
![Tapered Timber Firring for Flat Roofs 67mm to 3mm PEFC 47 x 75 x 4200mm]( "Tapered Timber Firring for Flat Roofs 67mm to 3mm PEFC 47 x 75 x 4200mm")
Tapered Timber Firring for Flat Roofs 67mm to 3mm PEFC 47 x 75 x 4200mm
Softwood timber furrings or also known as tapers are strips of timber (or a batten) that has been cut at an angle along its length diagonally so that it tapers, with one edge being deeper than the other. An ideal solution for flat roofs as it will allow... -
Special Offer
![C24 Timber Joists UC4 Treated Redwood 47 x 150 x 4800mm]( "C24 Timber Joists UC4 Treated Redwood 47 x 150 x 4800mm")
![C24 Timber Joists UC4 Treated Redwood 47 x 150 x 4800mm]( "C24 Timber Joists UC4 Treated Redwood 47 x 150 x 4800mm")
Special OfferC24 Timber Joists UC4 Treated Redwood 47 x 150 x 4800mm
C24 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. C24 graded timber is a premium loadbearing grade...
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.
Frequently Asked Questions
What is the difference between each type ie C16, C24 and part graded timber?
All graded timbers are slow-grown and kiln-dried so that there is no more than 20% of moisture in the wood. This is in keeping with relevant building regulations, as the kiln-drying process creates a timber that is incredibly strong, guaranteeing stability.
What is C16 Timber?
C16 graded structural timber is the most cost-effective option and meets performance requirements. Kiln dried C16 is generally recommended for most applications if the correct spans are used and is mainly used internally for floor and roof joists. Lengths commonly available are 3.0, 3.6, 4.2 and 4.8 meter.
What is C24 Timber?
C24 graded premium structural timber offers greater strength than C16 timber, making it a more demanding grade that can handle higher loads and wider spans. It is the better-quality structural option because it can take up to 50% longer for these timbers to grow, meaning that they have more growth rings. The more growth rings a piece of wood has, the higher its overall density, which in turn means that it has greater natural durability and improved stability. The tighter the growth rings of the wood, the better-quality piece of wood that you are dealing with.