The Sigma is a robust and practical greenhouse, measuring 3 × 12 m (9.8 × 39.4 ft) with a total area of 36 m². Its square galvanised steel frame combines strength with simplified installation, while shock-resistant glazing ensures resilience against adverse weather. With its expansive proportions, the Sigma is an elegant solution for ambitious gardeners who demand both durability and scale.
Key Features
- Square galvanised steel frame, profile 40 × 20 mm, engineered for strength and ease of assembly.
- 4 & 6 mm UV-protected polycarbonate panels manufactured in Europe.
- Two doors and two windows positioned at opposite ends for ventilation.
- Shock-resistant polycarbonate roofing for added durability.
- Supplied with clear and illustrated instructions for ease of installation.
- Reliable protection for plants in all weather conditions.
Technical Specifications
| Width | 3.0 m |
| Length | 12.0 m |
| Height | 2.1 m |
| Area | 36 m² |
| Frame | Square galvanised steel, 40 × 20 mm profile |
| Glazing | 6 mm UV-protected polycarbonate |
| Doors | Two single doors |
| Ventilation | Two windows, opposite ends |
| Foundation | Not required (anchors included) |
| Warranty | 5-year frame warranty and 10-year UV protection guarantee on polycarbonate. |
Applications
With 36 m² of growing space, the Sigma offers exceptional capacity for large-scale cultivation. Ideal for vegetables, flowers, and experimental growing, its generous height and straight interior lines make it suitable for shelving, raised beds, and vertical systems.
Delivery
Supplied with frame, panels, doors, and fixings. Illustrated instructions included. UK mainland delivery as standard.
Enhancements
- Roof windows
- Automatic window openers
- Galvanised steel shelving
- Professional installation
Why Premium Greenhouses
Our greenhouses are crafted in Europe with galvanised steel frames and UV-protected polycarbonate, designed to withstand the British climate.
With elegant design, reliable durability, and a range of models for every garden, Premium Greenhouses deliver quality without compromise.
Shipping Service
All greenhouses are shipped directly from our warehouse in England, ensuring fast and reliable delivery across the UK. Orders are dispatched from:
Unit 5, Upper Moorend Farm,
Mamble, Kidderminster,
Worcestershire, DY14 9JD, England
Private consultations are available by appointment, offering personalised advice to help you choose the right greenhouse for your garden.
Sigma: Strong by Design, Simple to Install.
Combines resilience, elegance, and ease.
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