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Rough Sawn Timber

Rough Sawn Timber is also referred to as carcassing timber.  It is used to create floor joists and timber framing in structural applications. Usually rough sawn timber comes in 3 different types of grading: C16 timber, C24 Timber and part graded timber.

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  • Rough Sawn Timber 100 x 100mm Rough Sawn Timber 100 x 100mm

    Rough Sawn Timber 100 x 100mm

    £11.90 - £91.23 (Ex VAT)
    £14.28 - £109.48 (Inc VAT)
    Treated graded carcassing is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. It is machined to have rounded edges, smooth faces and sides, for a more uniformed piece of timber. It is kiln dried to...
  • C24 Timber Joists Untreated Regularised PEFC 97 x 197mm C24 Timber Joists Untreated Regularised PEFC 97 x 197mm

    C24 Timber Joists Untreated Regularised PEFC 97 x 197mm

    £19.48 - £149.32 (Ex VAT)
    £23.38 - £179.18 (Inc VAT)
    Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form floors, walls, ceilings and roofs of properties for example.
  • C24 Timber Joists Untreated Regularised PEFC 97 x 297mm C24 Timber Joists Untreated Regularised PEFC 97 x 297mm

    C24 Timber Joists Untreated Regularised PEFC 97 x 297mm

    £24.30 - £186.30 (Ex VAT)
    £29.16 - £223.56 (Inc VAT)
    Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form floors, walls, ceilings and roofs of properties for example.
  • Rough Sawn Timber UC2 Treated FSC 19 x 38mm Rough Sawn Timber UC2 Treated FSC 19 x 38mm

    Rough Sawn Timber UC2 Treated FSC 19 x 38mm

    £0.78 - £5.98 (Ex VAT)
    £0.94 - £7.18 (Inc VAT)
    All Glennon Brothers timber is sourced and produced in the British Isles, reducing the carbon footprint of timber products compared to imported products. The sawn treated carcassing has a rough sawn finish, which is pressure treated to prolong timbers...
  • Rough Sawn Timber UC2 Treated PEFC 19 x 38mm Rough Sawn Timber UC2 Treated PEFC 19 x 38mm

    Rough Sawn Timber UC2 Treated PEFC 19 x 38mm

    £0.78 - £5.98 (Ex VAT)
    £0.94 - £7.18 (Inc VAT)
    All Glennon Brothers timber is sourced and produced in the British Isles, reducing the carbon footprint of timber products compared to imported products. The sawn treated carcassing has a rough sawn finish, which is pressure treated to prolong timbers...
  • Rough Sawn Timber Unseasoned FSC 22 x 100mm Rough Sawn Timber Unseasoned FSC 22 x 100mm

    Rough Sawn Timber Unseasoned FSC 22 x 100mm

    £1.44 - £11.06 (Ex VAT)
    £1.73 - £13.27 (Inc VAT)
    The UC4 incised posts has a minimum 15 years expected service life. The incising process helps the pressure treatment penetrate further into the timber. FSC approved. This means our timber is sourced responsibly.
  • Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 100mm Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 100mm

    Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 100mm

    £1.74 - £13.32 (Ex VAT)
    £2.09 - £15.98 (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. Carcassing is a...
  • 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

    £1.99 - £15.22 (Ex VAT)
    £2.39 - £18.26 (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.
  • Rough Sawn Timber Unseasoned FSC 22 x 150mm Rough Sawn Timber Unseasoned FSC 22 x 150mm

    Rough Sawn Timber Unseasoned FSC 22 x 150mm

    £2.16 - £16.60 (Ex VAT)
    £2.59 - £19.92 (Inc VAT)
    The UC4 incised posts has a minimum 15 years expected service life. The incising process helps the pressure treatment penetrate further into the timber. FSC approved. This means our timber is sourced responsibly.
  • Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 200mm Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 200mm

    Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 200mm

    £3.57 - £27.40 (Ex VAT)
    £4.28 - £32.88 (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.
  • Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 225mm Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 225mm

    Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 225mm

    £4.02 - £30.83 (Ex VAT)
    £4.82 - £37.00 (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.
  • Rough Sawn Timber Unseasoned FSC 22 x 75mm Rough Sawn Timber Unseasoned FSC 22 x 75mm

    Rough Sawn Timber Unseasoned FSC 22 x 75mm

    £1.08 - £8.30 (Ex VAT)
    £1.30 - £9.96 (Inc VAT)
    The UC4 incised posts has a minimum 15 years expected service life. The incising process helps the pressure treatment penetrate further into the timber. FSC approved. This means our timber is sourced responsibly.
  • Rough Sawn Timber UC3u Treated Unseasoned FSC 22 x 75mm Rough Sawn Timber UC3u Treated Unseasoned FSC 22 x 75mm

    Rough Sawn Timber UC3u Treated Unseasoned FSC 22 x 75mm

    £1.30 - £9.99 (Ex VAT)
    £1.56 - £11.99 (Inc VAT)
    Sleepers are always a popular product due to their versatility. They are often used as garden retainers, horizontally or sometimes dug into the ground and used vertically. Other popular applications are for steps and increasingly for growing vegetables...
  • Rough Sawn Timber UC2 Treated Type A FSC 25 x 38mm Rough Sawn Timber UC2 Treated Type A FSC 25 x 38mm

    Rough Sawn Timber UC2 Treated Type A FSC 25 x 38mm

    £1.03 - £7.87 (Ex VAT)
    £1.24 - £9.44 (Inc VAT)
    The sawn 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 and landscaping projects.
  • Rough Sawn Timber UC2 Treated Type A PEFC 25 x 38mm Rough Sawn Timber UC2 Treated Type A PEFC 25 x 38mm

    Rough Sawn Timber UC2 Treated Type A PEFC 25 x 38mm

    £1.03 - £7.87 (Ex VAT)
    £1.24 - £9.44 (Inc VAT)
    The sawn 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 and landscaping projects.
  • Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 38mm Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 38mm

    Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 38mm

    £1.17 - £8.99 (Ex VAT)
    £1.40 - £10.79 (Inc VAT)
    All Glennon Brothers timber is sourced and produced in the British Isles, reducing the carbon footprint of timber products compared to imported products. The sawn treated carcassing has a rough sawn finish, which is pressure treated to prolong timbers...
  • Rough Sawn Timber UC2 Treated Type A FSC 25 x 50mm Rough Sawn Timber UC2 Treated Type A FSC 25 x 50mm

    Rough Sawn Timber UC2 Treated Type A FSC 25 x 50mm

    £1.35 - £10.35 (Ex VAT)
    £1.62 - £12.42 (Inc VAT)
    The sawn 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 and landscaping projects.
  • Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 50mm Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 50mm

    Rough Sawn Timber UC2 Treated Tile Batten PEFC 25 x 50mm

    £1.54 - £11.83 (Ex VAT)
    £1.85 - £14.20 (Inc VAT)
    All Glennon Brothers timber is sourced and produced in the British Isles, reducing the carbon footprint of timber products compared to imported products. The sawn treated carcassing has a rough sawn finish, which is pressure treated to prolong timbers...
  • Rough Sawn Timber UC3u Treated Unseasoned UK FSC 25 x 50mm Rough Sawn Timber UC3u Treated Unseasoned UK FSC 25 x 50mm

    Rough Sawn Timber UC3u Treated Unseasoned UK FSC 25 x 50mm

    £0.99 - £7.56 (Ex VAT)
    £1.19 - £9.07 (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. Carcassing is a...
  • Scaffold Board Timber Banded Both Ends PEFC 38 x 225 x 3900mm Scaffold Board Timber Banded Both Ends PEFC 38 x 225 x 3900mm

    Scaffold Board Timber Banded Both Ends PEFC 38 x 225 x 3900mm

    £28.81 - £220.87 (Ex VAT)
    £34.57 - £265.04 (Inc VAT)
    With a long and proud tradition of supplying quality timber, timber products, and associated services, Howarth Timber & Building Supplies has established an enviable reputation for its versatility, reliability and expertise. Quality and range of...
  • Rough Sawn Timber Unseasoned 38 x 50mm Rough Sawn Timber Unseasoned 38 x 50mm

    Rough Sawn Timber Unseasoned 38 x 50mm

    £1.27 - £9.73 (Ex VAT)
    £1.52 - £11.68 (Inc VAT)
    The UC4 incised posts has a minimum 15 years expected service life. The incising process helps the pressure treatment penetrate further into the timber. FSC approved. This means our timber is sourced responsibly.
  • C16 Timber Joists Untreated Kiln Dried Regularised FSC 44 x 95mm C16 Timber Joists Untreated Kiln Dried Regularised FSC 44 x 95mm

    C16 Timber Joists Untreated Kiln Dried Regularised FSC 44 x 95mm

    £3.48 - £26.72 (Ex VAT)
    £4.18 - £32.06 (Inc VAT)
    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 44 x 95 x 4800mm C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 44 x 95 x 4800mm

    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 44 x 95 x 4800mm

    £3.72 - £28.49 (Ex VAT)
    £4.46 - £34.19 (Inc VAT)
    Our planed & regularised treated sawn timber is perfect for structural timber carcassing as it comes in��C24 grade. This timber is ideal for a number of uses in the home and garden. The pressure treatment on this timber protects it against wood...
  • C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 44 x 95 x 4800mm C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 44 x 95 x 4800mm

    C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 44 x 95 x 4800mm

    £4.07 - £31.20 (Ex VAT)
    £4.88 - £37.44 (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...

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.