C24 Sawn Green Treated Timber Support 47mm x 100mm
Create a strong, long-lasting structural base with Cladco’s C24 sawn green treated timber supports. FSC®-certified, Tanalith ‘E’ treated, and ideal for roofing or decking subframes. Available in 4.2m or 4.8m lengths, this 47mm × 100mm timber delivers excellent durability and load-bearing performance.
Built for Structural Strength - Ideal for Roofing and Decking Frameworks
Our 47mm × 100mm C24 sawn green treated timber joist provides a robust, weather-resistant solution for structural applications. Graded to the C24 strength class and treated with Tanalith ‘E’ preservative, this timber offers superior durability, making it ideal for both roofing supports and decking subframes.
Compared to standard C16 timber, C24 timber is approximately 50% stronger, featuring fewer knots and a denser grain structure. This allows for longer spans and increased loading without compromising stability, making it a reliable option for demanding builds.
Each timber piece is FSC®-certified, ensuring responsible sourcing. The green treatment enhances longevity by helping to protect the timber from rot, insect attack, and moisture-related decay. When installed on a solid concrete foundation, these supports offer a stable and lasting base for your decking or roofing project.
Timber specifications
- Lengths: 4.2m and 4.8m
- Width: 100mm
- Depth: 47mm
- Weight (Approx.): 9.96 kg (4.2m)
- Weight (Approx.): 11.38 kg (4.8m)
This timber can be sawn, planed or drilled as required, making it adaptable for use across a wide range of structural tasks. For decking applications, the joists form the essential understructure beneath your boards, especially when paired with Cladco’s recommended timber posts and fixings. For roofing, the same strength and treatment make these supports suitable for forming key structural layers such as purlins or rafters.
When using as a decking joist, Cladco strongly advises using a level concrete base for the flattest, most stable installation surface. Comprehensive installation guides are available to support best practices throughout your project.
Looking for an alternative timber support?
See our C24 sawn green treated timber decking joist 47mm x 150mm
Looking for a joist hanger?
See our face fix joist hangers 50 x 75mm (individual)
Or browse our framework category for roofing framework, decking framework and more…
Please note images may vary from the actual item supplied due to lighting variations and camera angles.
Order A Sample Pack!
Click Here to view our installation guide.
Download the datasheet for C24 Sawn Green Treated Timber Support 47mm x 100mm
| Type | When? | Cost? | ||
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National Delivery | Orders under £1,000 | Est. 5 working days* Roofing items 7-10 working days* |
£192.00 |
| Orders over £1,000 | Est. 5 working days* Roofing items 7-10 working days* |
£96.00 | ||
| Orders over £1,500 | Est. 5 working days* Roofing items 7-10 working days* |
FREE | ||
| Scotland Delivery | Est. 15 working days* Roofing items 7-10 working days* |
£360.00 | ||
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Millboard Delivery | Orders under £2,000 | Est. 5 working days* | £192.00 |
| Orders over £2,000 | Est. 5 working days* | FREE | ||
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Parcelforce Standard | (Small Parcels) | 3-5 working days* | £8.50 |
| Parcelforce Standard | (Large Parcels) | 3-5 working days* | £30.00 | |
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Sample Packs via Courier | 5 working days* | FREE | |
*Please allow for public holidays and weekends (non-delivery days)
Some of our products are available for collection from our warehouses in Okehampton (Devon) and Andover (Hampshire) - This option will show at checkout, when available.
Standard collection lead time is 3-5 working days, this may vary depending on the product. If you would like to collect your order after 2 hours, please choose this option at checkout.
Please note that collections are only available from Monday-Friday, 08:00 - 17:00 & Saturday, 08:00 - 12:30 (Note: this IS the cut off time for collections, despite our closing time of 13:00)
Please Note The Following Prior To Collection:
Vehicles we can and cannot load
Cladco Profiles will only load flatbed lorries and flatbed trailers for insurance purposes. If the appropriate vehicle is not available, two people would be required for a collection.
Cladco Profiles will NOT load any vehicles with roof racks, horse boxes, cattle lorries or fixed-sided trailers. Cladco Profiles has the right to refuse loading a vehicle for any reason.
Before arranging a collection, please read our Customer Collection Notice below.
Our Okehampton HQ and Warehouses (Devon)
Our Andover Warehouses (Hampshire)
Customer Collection Notice
For those customers wishing to collect materials, we ask you report to the office first in order to be seen by a member of the sales team. Your goods will then be picked and brought to your vehicle.
Please note that during busy periods you may experience a wait while our yard staff serve other customers or are loading/unloading other vehicles.
We respectfully draw your attention to the following points:
- It is the ultimately the responsibility of the customer to load his/her vehicle and to ensure the goods are safely/ securely strapped down.
- Our staff will be happy to assist you load your goods onto appropriate vehicles by way of fork lift trucks. Our staff will not handball any goods into enclose vehicles. The loading of the vehicle is carried out entirely at the customers own risk. We will not be held liable for any damage that may occur to your vehicle or goods collected from our premises during the transport of said goods.
- It is the responsibility of the customer to ensure both their vehicle and the goods are safe when they leave our premises.
- We can advise the approximate weight of materials prior to you arriving so that you can be sure your vehicle is capable of carrying the intended load. Please ensure that you bring appropriate ropes, straps or other securing materials as we are unable to provide you with any upon arrival.
- We strongly recommend you bring suitable protection materials to prevent your ropes/straps etc. be damaged by these edges. We recommend that you use good quality protective gloves when handling materials.
