Cladco Composite Structural Joist – 100mm x 50mm x 4m

£40.01 incl. VAT

Direct Delivery
Delivery Time: 5 to 10 Working Days

 Nationwide Delivery

Delivery Time: 5 to 10 Working Days
Delivery costs are calculated in the checkout based on products and delivery address. To read more about our delivery service click here.
Delivery Time: 5 to 10 Working Days
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Product Description

Ensuring that your project begins correctly is essential, and our structural composite joists can help you achieve that by providing a strong foundation for your deck boards or cladding to be placed correctly. Ideally placed onto a concrete base, these structural composite decking joists are made from recycled plastics and measure 4000mm x 100mm x 50mm.

The structural composite joists come in charcoal colour only. However, their colour 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.

Joist Specification

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

When building elevated decked areas, you need reliable support for your decking joists. Our structural composite joists are designed to provide just that, ensuring hard-wearing and long-lasting use for years to come.

If a solid concrete base isn’t an option, you can also place the structural composite joists directly onto the grass. To ensure maximum strength and reliability, we recommend purchasing one structural composite joist for every square meter of decking, with a maximum spacing of 400mm between each joist. For detailed installation instructions, please consult our installation guides.

Please note that Cladco Structural Joists require support every 1m for the structure of the joist itself. When installing composite decking onto structural joists, we advise 400mm centres. For PVC decking installations, we advise 300mm centres.

Additional information


Delivery Costs

At Roofin Online, we offer Everyday Low Prices across an ever-expanding range of roofing and construction materials online. We offer a fast and direct nationwide delivery service, utilising an efficient mix of couriers, haulage and manufacturers’ transport, enabling us to offer competitive prices to our customers.

This means that our delivery costs are calculated in the basket and checkout, as they depend on the products (i.e. brand, quantity, weight, length etc) and the delivery address.

Delivery costs are based on delivery to a single address within the UK Mainland, excluding the Scottish Highlands and Islands where additional costs may apply.

Please see examples of our delivery costs below:

Standard Parcels from £5.95

Small items, such as Ridge Kits, Dry Verge Units and Small Gutter Components etc.

Long Items from £12.00

Long items, such as Cavity Closers, Membranes, Guttering, Continuous Verge and Pipe etc.

Palletised Delivery from £40.00

Heavier products like roof tiles, lead rolls, paving etc require palletised delivery.

Clear Amber Delivery

Orders under £200 + VAT = £40.00 + VAT
Orders over £200 + VAT = £30.00 + VAT

Specialist dedicated transport for large items like roof sheets (Corrapol, Axiome, Axgard, Alukap-XR, Alukap-SS, Snapa, Aluflow and Alupave).

Delivery Updates

When Ordering: We give estimated delivery times upfront on the individual product pages. These delivery times are given in standard working days, which are Monday to Friday from 09:00 until 17:00 (excluding Bank Holidays). After Ordering: We will provide you with more accurate delivery updates after we have processed your order, the information provided will depend on the delivery service that’s available for the products you order and will be sent to the email address you enter during checkout. We may provide a planned delivery date, tracking information or simply further instructions if updates are to come directly from a supplier or delivery partner. Before Delivery: Deliveries are made on commercial vehicles up to 18-tonne rigid lorries, so please let us know about access restrictions, safe places and further instructions ASAP, as failed deliveries may incur additional costs, especially for bulky or palletised deliveries. During Delivery: Small items will be delivered to your door via courier, however, bulkier items, will require a specialist or palletised services. Palletised deliveries will be made on a lorry equipped with a tail-lift and pallet truck, so the driver will unload your order and place it at the nearest road access point to the delivery address (kerbside delivery). The delivery drivers will not provide labour and physically move the building materials to where you need them, so please ensure that somebody with the ability and willingness to handle the goods accepts the delivery. Please keep in mind that if you order in the evening, a weekend or on a bank holiday then your order will be processed by a member of our team the next working day. For example, if you order at 6 pm on Friday, and the products are on a 1-3 Working Day delivery time. Then you will receive delivery updates when your order is processed/dispatched the following Monday, meaning that Tuesday would be delivery day number 1. You can read more about our delivery service by visiting our delivery information page.