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At Ridgeons we offer an unrivalled selection of sizes, lengths and options available from stock within the Ridgeon group.
Ridgeons are probably one of the largest processors and suppliers of Carcassing timber across East Anglia and with a range including timber studs, machined and sawn timber, treated battens and scaffold boards you will surely find exactly what is required for your project.
Kiln Dried Construction Carcassing Timber
Moisture content 20%
Reduces shrinkage and distortion
Consistent in Size -
Important for floors and stud walls
Machined with eased corners -
Easier to handle
Chain of Custody -
Strength Graded -
Strength Class C16 Timber
Strength Class C24 Timber available to order
Satisfies Building regulations for internal structural applications
Grading is for Strength Not Appearance
(For exposed structural timber components it may be possible to select for appearance.)
Splits or shakes in the centre of the timber do not affect the strength
Preservative-treated with Celcure -
Use Class 2
Use Class 3 (to order)
Pre-treated and supplied touch dry
Green in colour
Note: Timber freshly treated with Celcure will swell and require time to dry back to original dimension.
We recommend that floor joists treated to special order should be treated with Protim ClearChoice to avoid problems associated with timber moisture uptake.
ClearChoice Preservative Treated (to order)
Use Class 1 or 2
Supplied touch dry
Timber can be used immediately
Constructional Carcassing Timber Frequently Asked Questions
Q. What is Construction Carcassing Timber used for?
A. Constructional Carcassing Timber is generally used for structural purposes and hidden from sight. C16, for example, can be used for construction projects such as roof rafters or floor joists and Treated Sawn is perfect for outdoor garden projects, provided it is treated to the right specification for the job. Find our specification guide here.
Q. What Constructional Carcassing Timber options do Ridgeons offer?
A. We offer an unrivalled range of sizes & lengths ex-stock. The vast majority being Class C24 strength graded, kiln dried and preservative treated, check out our carcassing pocket guide for more information.
Q. Can I have treatments applied to my timber?
A. We have a stock range of timber that is Celcure Class 2 treated, however, Celcure Class 3 and Clearchoice Class 1 & 2 Preservative treatments are available to order – discuss your needs with your local branch.
Q. Can you supply other sizes or lengths other than what is listed?
A. Yes, we can source special sizes, patterns or longer lengths – contact your local Ridgeons branch and have a chat and discuss your needs with us.
Q. What’s the difference between C16 or C24 Strength Class?
A. Internal structure applications require the timber to be graded to either C16 or C24.
C16 is generally recommended for most applications and is the most cost-effective option if the correct spans are used. For more demanding, higher loads or wider span applications then C24 will be required. C24 graded structural timber has fewer/smaller knots than C16 and will carry a higher point load.
Q. What does CLS stand for?
A. CLS stands for Canadian Lumber Standard and was originally manufactured for use in the building of timber-framed houses in Canada. Over the years CLS timber has become more and more popular in the UK for stud walls and other framing projects. The 2 most popular sizes are 50x100mm <finish 38x89mm> & 50x75mm <finish 38x63mm>
Q. What does PAR stand for?
A. Planed All Round – meaning that all edge and side surfaces have been planed.
Q. What does PSE Stand for?
A. Planed Square Edge – The timber has been put through a moulding machine to create true square corners. PSE is the ideal choice for internal joinery work.
Q. What’s the difference between the Nominal size and Finished size?
A. The Nominal size is the actual size that the timber is machined from, and the Finished Size will be the size of the timber after any machining. For example, PAR timber studs that are 50x100mm Nominal size but will have a finished size of 38x89mm once planed all round.
Q. What are FSC & PEFC?
A. FSC is the Forest Stewardship Council and the PEFC is the Programme for the Endorsement of Forest Certification. Both FSC and PEFC are committed to achieving the certification of forests to credible, independently verified standards of responsible forest management. Find more information on FSC and PEFC here.
For any other questions please contact us at firstname.lastname@example.org