100% Recycled Plastic Joist - 50mm x 100mm - 3000mm
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- Order placedToday
- Route scheduledPlanned around your postcode
- At your door1–3 working days
Standard delivery within 5 working days maximum.
Monday–Friday, including bank holidays. Remote mainland areas may take up to 2 extra working days.
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Select Pick up at checkout to arrange collection. Please wait for your ready-to-collect confirmation before travelling.
Warehouse details & opening hoursNeed help planning your project?
DELIVERED BY MAJESTIC
From our warehouse to your project.
Most mainland orders arrive in 1–3 working days, delivered by our own vans and drivers. Standard mainland delivery is within five working days; remote mainland locations may take up to two additional working days. We also deliver on bank holidays.
Delivery at a glance
Free standard mainland delivery on goods orders of £1,500 or more. All prices below include VAT. Thresholds apply to goods value, excluding delivery; your final delivery charge is shown at checkout.
| Destination | Below £1,500 | £1,500 or more |
|---|---|---|
| England, outside the areas below | £79 | Free |
| Southwest mainland | £99 | Free |
| Scotland & Wales | £99 | Free |
| Northern Ireland | £499 | Free |
Isle of Wight · PO30–PO41
£250 on orders up to and including £5,000. Free on orders over £5,000. A ferry crossing is required; our team will arrange delivery with you.
Which postcodes have the southwest rate?
PL, EX, TQ, TA, DT, BH and mainland TR postcodes, including Plymouth, Exeter, Torquay, Taunton, Dorchester, Bournemouth and Truro.
Isles of Scilly postcodes TR21–TR25 are excluded from mainland rates. Please contact us before ordering for delivery to the Isles of Scilly or other offshore destinations. The Cotswolds remains within the standard England rate.
Samples, fixings & mixed orders
Products assigned to our Samples and Fixings delivery profiles receive free UK Royal Mail Tracked 24 delivery. Mixed baskets containing boards or other larger materials follow the applicable delivery charge shown at checkout.
We aim to deliver project materials together. Items coming from another warehouse or a manufacturer may have different lead times; we will confirm the arrangements.
Preparing for delivery
Tell us about narrow roads, restricted access or unloading requirements before delivery. Please keep the unloading area clear. Our team will confirm arrangements for large or heavy orders and unload where it is safe and practical.
Read our delivery and safe-place information for full details.
Prefer to collect?
Collection is available from Manchester Warehouse, Unit 1B Invar Road, Wardley Industrial Estate, Worsley, Manchester, M27 9HF.
Usually ready in 24 hours. You’ll receive an email after placing your order; please wait for confirmation that your items are ready before travelling.
Monday–Friday: 8am–6pm
Saturday: 10am–1pm
Need help with your delivery?
Have your postcode and order number ready and we’ll help you plan the next step.
Installation Guide
To download our decking subframe installation guide PDF, click here.
100% Recycled Plastic Joist – 50mm x 100mm x 3000mm
Durable, Low-Maintenance Subframe Solution for Composite Decking
Engineered for strength and built to last, our 100% Recycled Plastic Joist (50mm x 100mm x 3000mm) is the ideal choice for constructing long-lasting, maintenance-free subframes for composite decking. Manufactured from high-quality recycled plastic, this joist offers exceptional resistance to rot, moisture, insect damage, and general wear – far outperforming traditional timber joists in outdoor environments.
With its solid, non-absorbent construction, this joist is perfect for ground-level and raised decking projects. It won’t warp, crack, or deteriorate over time, making it the smart and sustainable alternative to wooden subframes.
At 3000mm in length, this plastic joist reduces the number of joins in your substructure, helping to speed up installation while increasing structural integrity. Whether you’re building a garden deck, balcony platform, or outdoor feature, this joist delivers dependable, low-maintenance performance from the ground up.
Key Benefits:
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Dimensions: 50mm x 100mm x 3000mm – ideal for composite decking subframes
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Material: 100% recycled plastic – eco-conscious and sustainable
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Weatherproof: Will not rot, swell, splinter or absorb moisture
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Maintenance-Free: No painting, staining, or treating required
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Applications: Ideal for composite decking substructures, garden buildings, outdoor platforms, and landscaping frameworks
Why Choose Recycled Plastic Joists?
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Long-lasting performance in wet, shaded, or high-moisture areas
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Resistant to ground contact decay and insect infestation
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Supports composite decking boards with lasting strength and alignment
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Reduces labour, maintenance, and replacement costs over time
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Environmentally responsible alternative to treated timber joists
Build your deck on a foundation you can trust. Our 50mm x 100mm recycled plastic joist provides superior durability, stability, and sustainability – all with zero maintenance.
Smart, strong, and sustainable – the perfect base for composite decking.
Installation guides
Download our illustrated, step-by-step installation guidance before starting your project.