Trimax® Gardentop Staircase – Anthracite Outdoor Staircase
At a Glance
Use Type: Permanent Outdoor Staircase System
Structure Material: Hot-Dip Galvanised Steel
Tread Material: TRIMAX® Fibreglass-Reinforced Composite
Tread Finish: Anthracite Anti-Slip Surface
Tread Depth: 220 mm
Tread Thickness: 40 mm
Floor-to-Floor Height Range: 0.36 m – 2.64 m
Maximum Load Capacity: 200 kg
Width Options: 800 mm or 1000 mm
Guarantee: Lifetime Guarantee
Full Product Overview
The Trimax® Gardentop Staircase – Anthracite is a premium modular outdoor staircase system designed to deliver safe, weather-resistant and long-lasting access between external levels.
Ideal for raised patios, decking, terraces, balconies, garden rooms and landscaped outdoor spaces, this staircase combines hot-dip galvanised steel construction with high-performance TRIMAX® composite treads to provide dependable structural performance in demanding outdoor environments.
Its anthracite fibreglass-reinforced composite treads feature an anti-slip perforated surface that improves grip underfoot during wet weather conditions, helping provide safer everyday access throughout the year. Unlike traditional timber steps, the TRIMAX® material resists warping, cracking and rot, making it exceptionally low maintenance and highly durable in exterior applications.
The modular design allows configurations from 2 up to 12 treads, enabling the staircase to accommodate floor-to-floor heights ranging from 0.36 m up to 2.64 m while maintaining a clean, modern architectural appearance.
Constructed using corrosion-resistant galvanised steel, the staircase is engineered for permanent outdoor installation and backed by a Lifetime Guarantee for long-term confidence and reliability.
Sizes & Dimensions
| No. of Treads | Min Floor-to-Floor Height | Max Floor-to-Floor Height | Tread Depth | Tread Thickness | Staircase Width |
|---|
| 2 Tread | 0.36 m | 0.44 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 3 Tread | 0.54 m | 0.66 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 4 Tread | 0.72 m | 0.88 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 5 Tread | 0.90 m | 1.10 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 6 Tread | 1.08 m | 1.32 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 7 Tread | 1.26 m | 1.54 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 8 Tread | 1.44 m | 1.76 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 9 Tread | 1.62 m | 1.98 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 10 Tread | 1.80 m | 2.20 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 11 Tread | 1.98 m | 2.42 m | 220 mm | 40 mm | 800 mm / 1000 mm |
| 12 Tread | 2.16 m | 2.64 m | 220 mm | 40 mm | 800 mm / 1000 mm |
Choose the correct staircase configuration based on your finished floor-to-floor height requirements.
Key Benefits
Modular staircase system
Available in configurations from 2 to 12 treads for flexible installation heights.
Weather-resistant galvanised steel frame
Designed to withstand rain, frost and changing outdoor conditions.
TRIMAX® anti-slip composite treads
Fibreglass-reinforced tread surfaces provide excellent grip in wet weather.
Low-maintenance outdoor materials
Composite treads resist rot, cracking and warping unlike traditional timber steps.
Wide comfortable tread surface
220 mm deep treads improve comfort and confidence during everyday use.
Modern anthracite finish
Contemporary styling complements decking, terraces and modern outdoor spaces.
Lifetime Guarantee included
Built for long-term reliability and backed for added peace of mind.
Final Verdict
The Trimax® Gardentop Staircase – Anthracite delivers a premium outdoor access solution combining modular flexibility, anti-slip safety and outstanding weather resistance.
With galvanised steel construction, durable TRIMAX® composite treads and configurations covering heights up to 2.64 m, it provides a reliable and low-maintenance staircase system for terraces, balconies, decking and garden installations. Backed by a Lifetime Guarantee, it is an excellent long-term solution for modern outdoor access projects.
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