Sigma Spiral Staircase

✅ Premium spiral staircase combining laminated beech treads with a powder-coated steel structure for modern interiors.
🚚 FREE UK Mainland Standard Delivery — tracked service included.
� ️ Designed for lofts, mezzanines and contemporary spaces where a compact footprint and strong visual impact are required.

Technical

• Use Type: Domestic

• Structure Material: Powder Coated Steel

• Tread Material: Laminated Beech

• Tread Finish: Varnished

• Tread Thickness: 38 mm

• Adjustable Tread Rise: 190 mm – 235 mm

• Floor-to-Floor Height Range: 2470 mm – 3055 mm

• Staircase Diameter Options: 1200 mm or 1400 mm

• Minimum Floor Opening Length: 1250 mm

• Minimum Floor Opening Width: 1250 mm

• Maximum Point Load: 200 kg

• Maximum Surface Load: 620 kg

• Building Regulation Compliance: Yes

• Guarantee: Lifetime Guarantee

Key Benefits

• Compact Spiral Design
  Ideal for interiors where floor space is limited but access between levels is required.

• Premium Laminated Beech Treads
  38 mm thick varnished treads provide strength, durability and a high-quality finish.

• Adjustable Rise System
  Tread height can be adjusted between 19 cm and 23.5 cm for accurate installation.

• Modern Steel Structure
  Powder-coated steel frame delivers long-term durability with a contemporary finish.

• Multiple Diameter Options
  Available in 120 cm and 140 cm to suit different room sizes and layouts.

• Integrated Balustrade System
  Designed for safe everyday use with multiple balusters per tread.

📏 Sizes & Dimensions

Choose this staircase if you need a compact spiral solution with premium materials and adjustable installation.

How Does It Compare?

Compared with basic spiral staircases, the Sigma offers superior materials, better adjustability and a more refined architectural finish.

Full Product Overview

The Sigma Spiral Staircase is designed to deliver both visual impact and practical functionality in modern interiors. Combining laminated beech treads with a powder-coated steel structure, it creates a striking architectural feature while maintaining a compact footprint.

With adjustable risers and a floor-to-floor height range of up to 3.05 m, the Sigma staircase can be tailored to suit a variety of installations including loft conversions, mezzanine floors and contemporary living spaces. The spiral layout minimises floor usage while still providing safe and comfortable access between levels.

Available in two diameters, 120 cm and 140 cm, the Sigma staircase adapts to both tighter and more open interior layouts.

Safety & Build Details

• Laminated beech treads for strength and durability.

• Powder-coated steel structure for long-term stability.

• Adjustable riser system for accurate installation.

• Multi-baluster design for improved safety.

• Tested to 200 kg point load and 620 kg surface load.

• Complies with EN 1991 and EN 1993 structural standards.

Final Verdict

If you’re looking for a spiral staircase that combines premium materials with compact design, the Sigma Spiral Staircaseis an excellent choice. With adjustable rise, strong structural performance and a modern finish, it delivers both style and reliability — backed by a Lifetime Guarantee.