30mm x 40mm Black Composite Subframe Joist – 5m Image

30mm x 40mm Black Composite Subframe Joist – 5m

SKU: WPCDF50-SUB

Brand: Dex

Perfect Compatibility: Designed specifically for use with the Decking Range for a secure, level foundation.
Enhanced Drainage: Elevates the deck to promote airflow, drainage, and protection from moisture damage.
Solid Base Installation: Ideal for use on solid ground surfaces—not suitable for pedestal systems.
Sustainable Construction: Made from eco-friendly WPC (Wood Plastic Composite) materials.
Durable & Reliable: Backed by a 10-year warranty for long-lasting performance and peace of mind.

Description

30mm x 40mm Triton Natural Composite Subframe Joist – 5m

The Essential Foundation for a Strong, Long-Lasting Deck

Accompanying our Triton WPC Decking range, the Triton Natural Composite Subframe Joist is a crucial component of any decking installation. Though it may not be visible once installed, it plays a vital role in ensuring your deck’s stability, safety, and longevity.

Designed to sit securely between the ground and your decking boards, this durable subframe creates a solid base that promotes drainage and protects against moisture—keeping your decking structure strong for years to come.

✅ Key Features

Size: 30mm x 40mm
Length: 5m
Colour: Natural
Material: Wood Plastic Composite (WPC)
10-Year Warranty: Backed by a trusted manufacturer’s guarantee
For Use With: Triton Composite Decking Range
Installation Base: Suitable for use on a solid base (not designed for pedestal systems)
Eco-Friendly Construction: Made from sustainable wood-plastic composite materials
UV Weather Stability: Resistant to warping, rotting, and fading
Anti-Slip Surface: Provides added safety during installation
Low Maintenance: No staining, sealing, or repainting required

🏗️ Built for Performance

Engineered for Safety: Creates a solid, reliable foundation for your deck, reducing the risk of movement or instability.
Built to Endure: Virtually maintenance-free, weather-resistant, and designed to withstand years of exposure to the elements.
Effortless Upkeep: Keeps your deck strong and stable without ongoing maintenance demands.
Smart Design: Promotes proper drainage and ventilation beneath the decking surface.

While it may remain hidden, the Triton Natural Composite Subframe Joist is the backbone of your decking system—providing the strength, stability, and peace of mind every great deck deserves.

Technical Information

Lead Time: Into Order 3-5 Days
Delivery: 1-2 Working Days
Size: 40mm(W) x 30mm(H) x 5000mm(L)
Weight: 5.10 Kg
Colour: Black
Material: WPC
Guarantee: 10 Years Manufacturers

Delivery & Returns

Delivery

The despatch timings we publish are estimates and due consideration needs to be made when making purchases with tight deadlines and as such we shall not be liable for any losses, costs, damages, charges, or expenses caused by any delay for delivery of the goods.

Returns Policy For Brissco Online

We appreciate that there may be occasions you may wish to return items. To help you with this process please see our returns policy below.

Returning an item – Damaged

In the event you receive damaged goods we will arrange a replacement item for you. However, it is your responsibility to notify us within 72 hours of receipt that an item has been received damaged (please see risk below).

Returning an item – Risk

On receipt of the delivery you the customer, are responsible for those goods and any loss or damage to the goods shall be at your own risk.

Returning an item – Incorrect

If you receive incorrect goods it is your responsibility to notify us within 72 hours of receipt at which point we will make the necessary arrangements.

Delivery shortages

Firstly, our carrier delivers parcels/packages. Any shortages of them must be reported to the driver on receipt. Secondly, shortages of contents of the parcel(s)/package(s) against the enclosed Brissco advice note must be made within 72 hours.

PDFs

Decking Brochure

FAQs

1. What is the Triton Composite Subframe Joist used for?

The subframe joist forms the structural base of your Triton Composite Decking system. It sits between the decking boards and the ground, providing support, stability, and proper drainage for long-term performance.

2. Why is a subframe important for composite decking?

Although it’s not visible once installed, the subframe is crucial for maintaining the strength and integrity of your deck. It prevents movement, ensures even weight distribution, and helps protect against moisture damage.

3. What material is the subframe made from?

It’s made from sustainable WPC (wood-plastic composite) — the same durable, eco-friendly material used in Triton decking. This ensures consistency in performance and longevity across your entire deck system.

4. What are the dimensions and length of the joist?

Each subframe joist measures 30mm x 40mm and is supplied in 5m lengths, ideal for a range of decking layouts and sizes.

5. Is the subframe suitable for all types of installations?

The joist is best suited for installations on solid, level bases such as concrete or patio slabs. It is not designed for use with pedestals or raised deck structures.

6. What are the main benefits of using the Triton WPC Subframe?

Provides a solid, stable foundation for decking
Elevates the deck for improved drainage and ventilation
Prevents warping, rot, and moisture damage
UV weather-stable and maintenance-free
Anti-slip surface for safety during installation
10-year manufacturer’s warranty

7. How should the subframe be installed?

Lay the joists evenly spaced and securely fixed to a solid base. Ensure proper alignment to support the decking boards above and maintain consistent spacing for drainage and airflow.

8. Does the subframe require maintenance?

No. The WPC subframe is virtually maintenance-free, requiring no painting, sealing, or staining. A quick wash with mild soap and water is all that’s needed if dirt builds up during installation.

9. Can the subframe joist be cut to size?

Yes. The WPC joist can be easily cut using standard tools like a fine-tooth saw to achieve the required length for your deck layout.

10. Why choose Triton Composite Subframe Joists?

They offer durability, sustainability, and structural peace of mind — ensuring your Triton decking not only looks stunning but also stands strong for years to come.