8x20 Polycarbonate Greenhouse with Twin-Wall Insulated Panels

8x20 Polycarbonate Greenhouse with Twin-Wall Insulated PanelsHigh Capacity 8x20 Greenhouse for All Season Growing and Climate Control 6mm Twin Wall Polycarbonate for Insulation and UV Protection This 8x20ft greenhouse is built with 6mm twin wall polycarbonate panels for reliable insulation and light diffusion. The glazing is UV protected on both sides, helping to maintain a consistent internal climate while protecting plants from temperature extremes and sunburn. Extra Ventilation with 8 Roof Vents and a Rust

High-Capacity 8x20 Greenhouse for All-Season Growing and Climate Control

6mm Twin-Wall Polycarbonate for Insulation and UV Protection

This 8x20ft greenhouse is built with 6mm twin-wall polycarbonate panels for reliable insulation and light diffusion. The glazing is UV-protected on both sides, helping to maintain a consistent internal climate while protecting plants from temperature extremes and sunburn.

Extra Ventilation with 8 Roof Vents and a Rust-Resistant Frame

With eight roof vents included as standard, this greenhouse delivers excellent airflow across its extended layout. The matt-black aluminium frame is powder-coated for rust resistance and built to endure Australia’s harshest conditions.

Designed in New Zealand. Assembled in Australia.

Manufactured in New Zealand and assembled locally, this glasshouse is purpose-built for Australian conditions. Unlike many imported kits designed for milder climates, Winter Gardenz structures are engineered to handle the extreme weather seen in regional and coastal Australia — from strong winds to temperature swings.

Large-Scale Layout for Experienced Growers

At 2596mm wide x 6386mm long, this greenhouse provides the room serious growers need — ideal for food production, propagation zones, or diverse growing systems under one roof. It's a robust and scalable solution for high-output gardens or semi-commercial use.

• Dimensions: 2596mm (W) x 6386mm (L) x 2615mm (H to ridge)
• Height to gutter: 1620mm
• Glazing: 6mm twin-wall polycarbonate (UV-protected both sides)
• Frame: Matt-black powder-coated aluminium
• Roof vents: 8 included for enhanced airflow
• Wind Rating: Up to 150km/h when installed to specification

Download Installation Resources

To make installation easier, we’ve included both a detailed foundation plan and a general guide. These documents will help you set up your greenhouse safely and securely.

Download Foundation Plans Download General Foundation Guide

Recommended Accessories for the 8x20ft Poly Greenhouse

Customize your greenhouse for maximum efficiency and comfort with these popular upgrades:

✅ 6x Automatic Vent Openers

✅ 4x Greenhouse Louvre Vent Kits

✅ 2x 10ft 3-Tier Adjustable Greenhouse Shelving

✅ 2x 8x10ft Shade Cover Kits

✅ 1x Aluminium Mesh Screen Door

✅ Extra Set of Sliding Doors for Back Wall

Please note: Greenhouses can only be delivered to your nearest Mainfreight Depot.