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10ft x 18ft Straight Sided Polytunnel Kit, Heavy Duty Professional Greenhouse

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SKU:
10X18SSPOLY.1
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Was: £679.00
£610.00
Product Description

10ft x 18ft Heavy Duty Commercial Polytunnel Kit — Straight-Sided, High-Roof Design

Engineered for Professional Growers, Allotments & Small Gardens

Optimise your growing space with our 10ft × 18ft Heavy Duty Commercial Polytunnel Kit — a robust, professional-grade structure designed for allotments, serious home growers, and compact market garden spaces.

This high-roof, straight-sided design maximises usable internal height, making it perfect for tall crops like tomatoes, vines, and climbing vegetables — all in a compact footprint.

Built from premium materials and engineered for UK conditions, this polytunnel offers exceptional durability, growing performance, and year-round protection.


What’s Included

  • Frame: Heavy-duty 35 mm diameter Z35 galvanised steel hoops (1.2 mm wall thickness)

  • Spacing: 6 ft (1.8 m) hoop centres with integrated ridge bar and internal crop bars for extra strength

  • Bracing: 4 Wind brace corner struts included as standard

  • Cover: 720 g/m² UV-stabilised diffused polythene with anti-drip, anti-condensation coating and a 5-year guarantee

  • Fixings: Full set of galvanised clamps, brackets, bolts, and tensioning components

  • Base Anchoring: Heavy-duty ground tubes suitable for concreting or hammer-in ground installation

  • Protection Kit: Anti-hotspot tape, repair tape, and comprehensive printed assembly instructions


Optional Upgrades Available

  • Single or double-width hinged timber door kits

  • Additional internal crop bars or staging systems

  • Replacement covers and spare fittings for long-term maintenance


Dimensions & Technical Specifications

  • Width: 10 ft (3.05 m)

  • Length: 18 ft (5.48 m)

  • Ridge Height: Approx. 7 ft 6 in (2.29 m)

  • Side Clearance: Approx. 2 ft 6 in straight sides before arch — maximises usable vertical space

  • Steel Tubing: 35 mm Z35 galvanised steel

  • Cover Spec: 720 g/m² diffused light, anti-drip polythene, UV stabilised (5-year warranty)

  • Wind Performance: Suitable for all UK exposed sites when correctly installed

  • Straight-Sided High-Curve Design: Combines excellent headroom with structural strength


Why Choose the Direct Plants 10x18ft Polytunnel?

  • Commercial-Grade Strength – Built to last with premium steel and heavy-duty components

  • Compact but Tall Growing Space – Perfect for tomatoes, vines, tall crops and trellised plants

  • Advanced Light Diffusion – Encourages strong, even growth and reduces risk of leaf scorch

  • UK Weather Ready – Engineered for resilience in high winds and heavy weather

  • Peace of Mind – 5-year cover warranty and steel frame with a 20+ year lifespan

  • UK-Based Support – Ongoing technical support and easy access to spare parts


Installation Information

  • Supplied as a complete self-build kit

  • Requires 2–3 people for safe and efficient assembly

  • Typical build time: 1–2 days

  • Tools required: spanners, drill/driver, hammer, shovel/spade, spirit level

  • Must be installed on level ground, or levelled to your ground and securely anchored

  • Clear, step-by-step printed instructions included for easy setup


Delivery, Warranty & Customer Support

  • Fast UK mainland delivery – typically within 5–10 working days

  • Delivery surcharge applies to Scottish Highlands, Islands & remote areas

  • 5-Year cover warranty and 20+ year frame lifespan expected

  • UK-based customer service team available for technical advice and replacement parts


Order Your 10x18ft Commercial Polytunnel Kit Today

Compact footprint. Serious growing performance.
Add to basket now or contact our team for expert guidance on sizing, siting, and installation.

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