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The UK's most affordable, high-quality decking board

4m Structural Composite 100x50mm Joist

£40.00

About this product

Designed for Wall Cladding or Decking projects with a hollow core construction for a lightweight subframe, Cladco 4m Structural Composite Joists offer a wide supporting surface for the base of your project.

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Total Price: £40.00 Inc VAT
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4m Structural Composite 100x50mm Joist

4m Structural Composite 100x50mm Joist
4m Structural Composite 100x50mm Joist Everything you need to know about Cladco Composite Joists and Structural Composite Joists

Online Decking Calculator

Use our calculator to work out how many boards and fixings you need for your project.

Details

More About Cladco 4m Structural Composite Joists

Making sure you begin your project the right way is crucial, and our 4m Structural Composite Joists will do exactly that, enabling you to place Composite Decking Boards correctly. Ideally placed onto a concrete base underneath, Structural Composite Decking Joists will ensure that everything is positioned for a strong foundation for your project.

Produced from 60% recycled hardwood fibres and 40% recycled plastics. and measuring 4000mm x 100mm x 50mm, Cladco Structural Composite Joists are available in Charcoal colour. The colour of these Joists does not need to match the rest of your installation as they will be installed within the foundations and can be hidden with Decking Boards and Fascia Boards.

Specifications:
Joist Length: 4m
Joist Width: 100mm
Joist Thickness: 50mm
Joist Weight: 17.24kg

Decking Joist Support You Can Trust

Used for elevated Decking areas, you can also place Structural Composite Joists directly onto grass if a solid concrete base isn’t an option. These are designed to ensure hard-wearing and long-lasting use for many years.

We recommend purchasing one Structural Composite Joist for every square metre of Decking and should be spaced no more than 400mm apart at a maximum so that your base is as strong and reliable as possible. For more on how to install correctly, consult our Installation Guides.

Cladco Structural Joists will require support every one metre for the substructure of the joist system itself. When installing Composite Decking onto Structural Joists, we advise 400mm centres.

*Cladco Composite products are available as FSC® Certified for the same cost. If you require FSC® Certified products, please ask for these when placing your order.

Delivery
Information

Please click on the variable options on our checkout page.

Cladco offer a Nationwide delivery service (UK Mainland) We offer a range of options, please see the table below.

Useful Links: Delivery Policy | Collection Policy

Delivery

Delivery is estimated 5 working days (1 week).


Collection

Collection from our Okehampton or Andover warehouse. Please note we need 2 hour notice.


Sample Packs

Sample packs are sent via Courier and delivered within 3-5 working days.

Pricing Table

TYPE WHEN? HOW MUCH?
 
National Delivery (Orders under £1,000) Estimated 5 working days* £192.00
(Orders over £1,000) Estimated 5 working days* £96.00
(Orders over £1,500) Estimated 5 working days* FREE
Scotland Delivery Estimated 15 working days* £360.00
 
Millboard Delivery (Orders under £2,000) Estimated 5 working days* £192.00
(Orders over £2,000) Estimated 5 working days* FREE
 
Parcelforce Standard
(Small Parcels)
3-5 Working Days £8.50
Parcelforce Standard
(Large Parcels)
3-5 working days £30.00
 
Sample Packs 5 Working Days FREE
*Please allow for public holidays and weekends (non-delivery days)

When your goods are delivered these are sometimes delivered on a pallet with the necessary associated packaging to ensure they arrive with you in the best possible condition. We view the pallet and packaging as necessary for the protection of the goods and therefore will be a part of what is delivered to you. It is your responsibility to dispose of these items in a responsible manner when appropriate.

Features Video
Frequently Asked Questions
What are Cladco Structural Composite Joists used for?

They are used to provide a strong foundation for Composite Decking Boards, ensuring everything is positioned correctly for a durable Decking project.

Do the joists need to match the colour of the Decking Boards?

No, the joists are available in Charcoal and don’t need to match the rest of your installation as they will be hidden within the foundations.

What support is required for Cladco Structural Joists?

The Joists will require support every one metre for the substructure of the joist system itself. When installing Composite Decking onto Structural Joists, 400mm centres are advised.

Why is it important to double Joist and use two Clips at adjoining Boards?

When our Composite Decking Boards expand and contract, they must be securely fastened to minimise movement. A single Joist may not provide sufficient surface area for the ends of two Boards to be properly anchored. Using double Joists at adjoining points ensures each Board end is attached to a joist, increasing the stability of your project. Adjoining Boards should never share the same Clip, and should be secured using two clips per Board end.

 

This method will improve the structural integrity of your Decking; especially in high-stress areas like the ends, where foot traffic, weathering and material contraction or expansion increase the strain on your Decking.

 

Adhering to these guidelines will help ensure proper installation and longevity of your Composite Decking. Failure to follow these guidelines will invalidate the product’s warranty.

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