How to choose a cost-effective Polytunnel greenhouse?
Jul 21, 2025
Polytunnel greenhouses have become a popular choice for modern horticulture and agricultural planting due to their low cost, convenient installation, and wide applicability. However, the products on the market are uneven. How can we choose a truly cost-effective Polytunnel greenhouse?
Factors that determine the cost-effectiveness of Polytunnel greenhouses
① Frame material: galvanized steel vs. aluminum alloy
● Galvanized steel pipe (best cost-effectiveness): strong anti-rust performance, life of 5-10 years (ordinary steel pipe only 2-3 years), cost 15%-20% higher than ordinary steel pipe, but long-term maintenance cost is lower.
● Aluminum alloy (high-end demand): lighter, suitable for frequent disassembly, but the price is 2-3 times that of galvanized steel.
② Covering film: PE vs PVC vs EVA
| Material | Light transmittance | Lifespan | Price | Applicable scenarios |
| PE ordinary film | 85%-90% | 1-3 years | $0.2-0.5/㎡ | Short-term planting |
| PE anti-drip film | 80%-88% | 3-5 years | $0.6-1.2/㎡ | High humidity environment |
| PVC reinforced film | 75%-82% | 5-8 years | $1.5-2.5/㎡ | Extreme climate |
| EVA multifunctional film | 90%+ | 5-10 years | $2.0-3.5/㎡ | High-end greenhouse |
Purchasing recommendations:
Temperate climate: Choose PE anti-drip film (best value for money).
Windy/snowy areas: Choose PVC or EVA film, which is more tear-resistant.
③Structural design: wind resistance vs drainage
● Wind resistance: Arch spacing ≤ 0.65m, 40% higher wind resistance than 1m spacing, reinforced anchors (such as spiral ground nails) are more stable than ordinary ground pipes.
● Drainage system: Polytunnel with gutter design can reduce water accumulation and extend service life.
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