

4m Composite Joists/Batten
Cladco 4m composite joists and battens offer a versatile solution for your outdoor projects. Use them as composite joists to support your garden decking or as composite battens for exterior wall cladding installations. Manufactured from the same durable wood-plastic composite material as our decking and cladding boards, they’re designed to work seamlessly as part of a complete system - ideal for long-lasting, low-maintenance substructures.
About Our 4m Composite Joists/Battens
Bring your composite decking or cladding to life with Cladco 4m composite joists/battens. Designed as a vital structural component, these joists and battens provide reliable support for the installation of composite boards.
Ideal for use as decking joists, they offer a durable, weather-resistant base for your outdoor space. Alternatively, they can be installed as cladding battens, either vertically or horizontally, depending on your project’s design. Made from the same composite material as our boards, they offer a consistent, low-maintenance solution for any outdoor build.
Joist specifications
- Length: 4m
- Width: 50mm
- Height: 30mm
- Weight (Approx.): 5.16kg
Cladco composite joists and battens are supplied in a dark charcoal colour, providing a sleek and modern finish to any substructure. For decking installations, joists should be spaced no more than 400mm apart, while for wall cladding applications, battens should be spaced at a maximum of 500mm apart to ensure proper support.
As a general guideline, we recommend one joist per square metre of decking. For best results, especially in decking projects, joists should be installed over a solid concrete base to create a sturdy, long-lasting foundation for your outdoor space.
Looking for an alternative?
For 4m structural joists see our 4m structural composite 100x50mm joist
For aluminium joists see our 4m aluminium decking joist 50mm x 50mm
Or browse our decking frame department for timber joists and more…
*Cladco composite products are available as FSC® certified at no additional cost. If you require FSC® certified products, please specify this when placing your order.
Please note that these 30mm x 50mm composite joists are non-structural and must be supported along their full length during any decking or cladding installation to ensure stability and performance.
Images shown are for illustration purposes only. Actual items and measurements may vary slightly.

Order A Sample Pack!

Click Here to view our installation guide.
Download the datasheet for 4m Composite Joists/Batten


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.