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 | Postcodes: PA, PH, DD, AB, IV, & KW | 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
Please ensure you have pre-booked your collection slot before travelling to site.
When arriving to collect your order, please report to a member of our Warehouse Team who will register your arrival and locate your goods. Once ready, your items will be picked and brought to your vehicle loading area.
During busy periods, there may be a short wait while our yard team assist other customers or complete other loading tasks. We always do our best to work within your booked collection time.
We respectfully draw your attention to the following important points:
- Loading is ultimately the customer’s responsibility. While our team can assist with mechanical loading using forklifts, we cannot handball items into enclosed vehicles. Customers must ensure their vehicle is suitable and that goods are safely loaded and adequately secured before leaving the premises.
- Sharp sheeting, metal goods, and long/heavy items may pose additional handling risks. Please come prepared with high-quality protective gloves, and any appropriate protection materials to avoid damage to your vehicle or restraints (e.g. ropes or straps). The edges of roofing sheets and metal products can be extremely sharp, and care should be taken when handling.
- We strongly recommend that customers bring their own straps, ropes, or other securing materials, as we are unable to provide these at the point of collection.
- If you are unsure of your vehicle’s load capacity, we can advise the approximate weight of your order in advance. It is your responsibility to ensure your vehicle is suitable for transporting the goods safely and legally.
- Cladco will not be held liable for any damage to your vehicle or goods once they have been loaded and leave our premises. Loading assistance is provided entirely at the customer’s own risk.
Click & Collect – Pre-Booking Required
You are welcome to collect your order from either our Okehampton (Devon) or Andover (Hampshire) site. All collections must be pre-booked in advance so your items can be picked, packed and ready for you.
Please do not travel to site without a confirmed collection time, as we cannot guarantee your order will be available.
Once your items are ready, you will receive an email with a link to book your collection slot. Please note, same-day collections are not available and bookings must be made at least two hours in advance.
When you arrive, please bring your order confirmation and follow the signage to the collection area where a member of our team will assist you.
