14ft x 42ft Heavy Duty Straight Sided Polytunnel Kit – Professional Greenhouse
£1,190.00
£1,329.00
Engineered for Professional Growers, Allotments & Smallholdings
Take your growing to the next level with our 14ft × 48ft Heavy Duty Commercial Polytunnel Kit — a robust, professional-grade structure designed to meet the demands of serious growers, market gardens, allotments, and small-scale commercial operations.
Built from high-spec materials and engineered for UK conditions, this polytunnel offers exceptional durability, generous internal space, and a reliable year-round growing environment.
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
Single or double-width hinged timber door kits
Additional internal crop bars or staging systems
Replacement covers and spare fittings for long-term maintenance
Width: 14 ft (4.27 m)
Length: 48 ft (14.63 m)
Ridge Height: Approx. 9 ft (2.74 m)
Side Clearance: Approx. 2 ft 6 in straight sides before arch begins – maximising usable head height
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: Ideal for tall crops and increased working headroom throughout
Commercial-Grade Strength – Engineered for long-term use and high-performance growing
Tall Growing Environment – 9ft central height with straight sides offers optimal space for tomatoes, vines, and tall crops
Advanced Light Diffusion – Reduces plant scorch and promotes uniform growth
UK Weather Ready – Designed to withstand high winds and variable weather conditions
Peace of Mind – 5-year cover warranty and durable steel frame with a 20+ year lifespan
UK-Based Support – Full after-sales service and spare parts always available
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
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
Invest in a structure that grows with your ambition.
Add to basket now or contact our team for expert guidance on sizing, siting, and installation.
