Structural Stability
Provides strong, dimensionally stable substructure
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TerraBase™ Composite Decking Joists
Stable Below. Beautiful Above. Built to Last.
Moisture-resistant composite decking joists for a stable, low-maintenance substructure beneath terraces and balconies. Swedish-designed and EU-made.
75%
European hard wood fibre
15% virgin HDPE, 10% additives
Warranty
Up to 20 years warranty*
Colors
Available in Graphite Black — a discreet structural black designed to disappear beneath the deck for a clean finished appearance.
- Made in EU
- Expert Support
- Easy Installation
Available Colors
Available in Graphite Black — a discreet structural black designed to disappear beneath the deck for a clean finished appearance.
Features and comparison
Moisture Resistant
Unaffected by ground moisture and humidity
Composite Construction
High-density composite for consistent strength
System Compatible
Works with Green Plank® fastening systems
Compared to wooden joists
- No rot, decay, or termite damage
- No warping or settling over time
- Consistent load-bearing capacity
- No maintenance treatments required
Compared to aluminum
- Better thermal properties
- Lower cost than aluminum
- Better aesthetic integration
- Better fastening compatibility
Available Lengths
Choose the perfect length for your project
300 cm lm
Board Length
400 cm lm
Board Length
Installation
Installation System
- System
- Mechanical fixing or pedestal
- Method
- Installed on concrete, pedestals, or base
- Joist Spacing
- 300–400 mm c/c depending on decking
Pro Tips
- Ensure level and stable base
- Use correct spacing for selection
- Allow ventilation beneath surface
- Follow system guidelines
Specifications and warranty
Dimensions
- Width
- approx. 70 mm
- Height
- approx. 40 mm
- Weight
- approx. 2.2 kg/m
Material
- Material
- High-density composite
Warranty
- Residential
- Up to 20 Years*
Applications, maintenance, and sustainability
Applications
Recommended uses and environments for this product.
- Residential decking substructures
- Commercial terraces
- Balconies and rooftop decks
- Public walkways and platforms
Maintenance
Simple care tips to keep your installation looking its best for years.
- No maintenance required
- Does not require treatment
- Inspect periodically
Sustainability
Material origin, environmental impact, and certifications.
- Made in
- 🇪🇺 Made in Europe
- CO₂ footprint
- 🌱 Reduced CO₂ footprint
- Recyclable
- Yes
Certifications
- Recyclable composite material
- Long service life reduces material waste