

Recycled Plastic Joist, 50mm x 125mm x 3m length, Black
Manufactured using 100% recycled plastics, these 50mm x 125mm joists are a high-quality, robust and durable product that is easy to handle during installation. Plastic joists will ensure your garden decking is well supported and structurally sound. Available in 3m lengths to fit specific decking subframe requirements.

Discover Our 100% Recycled 3m Plastic Joists
A sturdy base is crucial for any quality decking build. Properly installed, structurally sound, and secure joists are essential for long-lasting decking boards.
Our plastic joists are made from 100% recycled end-user plastics, for a robust and high-quality decking joist. These black joists can be installed underneath Nordeck, Millboard®, timber or composite decking boards.
Joist specifications
- Length: 3m
- Width: 125mm
- Height: 50mm
- Colour: black
To make these joists, the plastics are melted down, shaped into moulds and cooled to form strong and heavy-duty support battens. Not only do they offer eco-friendliness through recycling but also come with a 20-year warranty.
Other benefits include
- Greater strength compared to timber.
- Manufactured in the UK.
- Eco-friendly, lasting alternative to timber.
- Suitable for installation on grass, concrete, or uneven terrain.
- Compatible with multiple decking boards
Resistant to splintering and rot. - No need for varnish, treatment, or sanding
Virtually maintenance-free. - Simple to install, recycled plastic joists can be cut to custom sizes using traditional hand tools, ensuring a seamless fit for your decking project regardless of its shape or size.
Looking for a longer plastic post?
See our 3.6m recycled plastic joist, 50mm x 100mm
Looking for another size?
See our 3m recycled plastic joist, 100mm x 100mm
Or browse our recycled joist department for decking frames and more…
Order A Sample Pack!

Download the datasheet for Recycled Plastic Joist, 50mm x 125mm x 3m length, Black
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.