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Garden Greenhouses

Agromax 4 × 20 m Polycarbonate Greenhouse, 4 mm

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Agromax 4 × 20 m Polycarbonate Greenhouse

An 80 m² area for growing The Agromax greenhouse measures 4 × 20 m, with a listed height of 2.96 m and an 80 m² area. Its clear polycarbonate covering is supplied as 17 sheets, each 4 mm thick. The frame is made from galvanised steel.

Features and dimensions

  1. A defined growing footprint: At 4 m wide and 20 m long, this greenhouse gives you a clear footprint to plan around. Check the dimensions against the space available for the structure and your intended layout.
  2. Galvanised steel frame: The frame material is galvanised steel. The listed profile sizes are 40 × 20 mm and 20 × 20 mm, with 200 cm between arches.
  3. Clear polycarbonate covering: The greenhouse comes with 17 clear polycarbonate sheets, 4 mm thick. The listed sheet count and thickness can help you check that the covering matches your requirements.
  4. 2.96 m overall height: The listed height is 2.96 m. Take this measurement into account when checking the available space and planning where the greenhouse will sit.
  5. Extensions are separate: The greenhouse can be lengthened in 2 m increments by adding an extension section in the middle of the structure, rather than at an end. Extension sections are sold separately and are not included with this 20 m model.

Experiences with Bloomcabin

  1. "Ordering from Bloomcabin was straightforward, and the team answered my questions before I purchased. I'm very happy with my choice." – Aoife Murphy
  2. "My order arrived carefully packaged and was exactly as described. The quality met my expectations, and I would happily purchase from Bloomcabin again." – Conor Walsh
  3. "I had a question about my delivery, and Bloomcabin's customer support was friendly and helpful. They kept me informed and made the whole experience easy." – Niamh O'Brien

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We offer flexible and secure payment methods to make your shopping experience smooth and convenient.

Order now and save 45% with Bloomcabin. Bring your home and garden ideas to life, with helpful customer support from choosing your product to arranging delivery.



  • Article number: Agromax-Frame-4x20-00342-8x00316-LC4-L17
  • Colour: Clear / transparent
  • Size: 4x20 m
  • Height: 2.96 m
  • Length: 20 m
  • Area: 80 m2
  • Arch spacing: 200 cm
  • Frame: Galvanised steel
  • Frame: 40x20 & 20x20 mm
  • Rust protection: Galvanisation
  • Polycarbonate: 4 mm
  • Polycarbonate sheets: 17 pcs
  • Packaging: Number of packages: 1; package dimensions: 166 × 99 × 9 cm; package weight: 25 kg; Number of packages: 1; package dimensions: 186 × 32 × 9 cm; package weight: 27 kg; Number of packages: 1; package dimensions: 166 × 99 × 5 cm; package weight: 27 kg; Number of packages: 1; package dimensions: 186 × 32 × 5 cm; package weight: 27 kg; Number of packages: 1; package dimensions: 120 × 194 × 9 cm; package weight: 10 kg; Number of packages: 1; package dimensions: 196 × 22 × 8 cm; package weight: 5 kg; Number of packages: 1; package dimensions: 182 × 12 × 8 cm; package weight: 4 kg; Number of packages: 1; package dimensions: 210 × 80 × 80 cm; package weight: 22 kg; Number of packages: 8; package dimensions: 166 × 99 × 5 cm; package weight: 17 kg; Number of packages: 8; package dimensions: 186 × 32 × 5 cm; package weight: 18 kg; Number of packages: 8; package dimensions: 210 × 60 × 60 cm; package weight: 22 kg
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10 year warranty
Bloomcabin is proud of its high-quality products and maintains these standards every day through a range of manufacturing and quality control processes. This is backed by a 20-year warranty against wood rot in timber structures and a 10-year warranty against functional defects.
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