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Joists & accessories
WPC Decking Joist, Teak Brown — 3100 × 40 × 30 mm | DECNO Decking Substructure
- Dimensions
- 3100 × 40 × 30 mm
- Stock
- Casablanca
DECNO WPC decking joist — 3100 × 40 × 30 mm. A wood-plastic composite structural profile in teak brown for laying outdoor decking boards. Longitudinal grooves for fixing clips, ventilation notch underneath, resistant to UV, moisture and insects. Fast installation with concealed clips. Request your DECNO quote.
- Longitudinal grooves for concealed clips — the top face of the joist carries profiled grooves that take the fixing clips of the decking boards — a fast, clean, invisible installation that gives a professional result with no visible screws.
- Ventilation notch underneath — the underside is profiled with a dovetail notch that lets air move under the terrace — essential to prevent moisture building up and to keep the whole structure durable.
- High-strength WPC — a wood-plastic composite that combines the mechanical strength of timber with the water resistance of plastic — no rot, no swelling, no distortion, even after years of exposure.
- Full UV and weather resistance — the DECNO WPC joist resists UV, wide temperature swings, rain and damp — well suited to the Moroccan climate with its large thermal ranges and intense rainy spells.
- Resistant to insects and fungi — unlike timber joists, the WPC joist has nothing to fear from termites, fungi or mould — a sound, durable structure with no chemical treatment.
DECNO WPC Decking Joist 3100 × 40 × 30 mm — The Invisible Structure Behind a Terrace That Lasts
A good composite terrace starts with a sound installation structure. The DECNO WPC decking joist, 3100 × 40 × 30 mm, is the reference bearer for professional installation of DECNO composite decking boards. Made from high-strength wood-plastic composite, it combines structural rigidity, weather resistance and ease of installation in a single profile. Its built-in longitudinal grooves for fixing clips and its ventilation notch underneath make for a fast, solid and durable installation on any outdoor terrace in Morocco.
Why choose the DECNO WPC decking joist?
- ✓ Longitudinal grooves for concealed clips: a fast, clean, invisible installation with no visible screws.
- ✓ Ventilation notch underneath: lets air move under the terrace, essential to prevent moisture building up.
- ✓ High-strength WPC: no rot, no swelling, no distortion, even after years of exposure.
- ✓ Full UV and weather resistance: well suited to the Moroccan climate and its large thermal ranges.
- ✓ Resistant to insects and fungi: nothing to fear from termites, fungi or mould, with no chemical treatment.
- ✓ Generous 3100 mm length: large areas covered with a minimum of joints.
- ✓ Matched to DECNO decking boards: full compatibility for a complete installation system.
Where it is used
- ✓ Villa and house terraces
- ✓ Apartment terraces and rooftops
- ✓ Pool areas and pool decks
- ✓ Hotel and resort terraces
- ✓ Restaurant and café outdoor areas
- ✓ Garden and outdoor landscaping
Request your tailored quote
For prices, stock availability or installation guidance, use our online quote form. The DECNO team comes back quickly with an offer matched to your composite decking project.
Frequently Asked Questions
Frequently asked questions
Everything about
this product
What is a WPC decking joist?
A WPC decking joist is the invisible structural profile that supports composite decking boards. It is laid perpendicular to the boards, fixed to the slab or the supporting ground, and takes the boards’ fixing clips. The DECNO WPC joist is a clear improvement on timber joists: it does not rot, does not swell and needs no treatment.
What spacing between joists for a composite terrace?
For DECNO composite decking boards we recommend 40 to 50 cm between joist centres in standard installation. For terraces taking heavy loads or vehicle access, reduce the centres to 30 cm. Our team can advise on the setting-out for your project when you request a quote.
How is the WPC joist fixed to the slab?
The DECNO WPC joist is fixed directly to the concrete slab or the existing substrate with suitable stainless screws, or on adjustable decking pedestals. It can also rest on adjustable pedestals for raised terraces or roof terraces. The grooved face must always face upwards to take the boards’ fixing clips.
Is the WPC joist suitable around a pool?
Yes. The DECNO WPC joist is 100 % waterproof and resistant to pool chlorine products. Its ventilation notch underneath helps it dry quickly after splashes or rain. It is the ideal structural solution for poolsides, pool decks and outdoor water areas.
What does the WPC decking joist cost in Morocco?
The price of the DECNO WPC decking joist varies with the quantities ordered and the project. Contact us through our quote form to get a price tailored to the area of your terrace and your specific needs.
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