Protecting Your Greenhouse from Blizzard Damage
Winter storms and heavy snowfall can put immense pressure on greenhouse structures, often leading to torn plastic or collapsed frames. Whether you are using a professional polycarbonate setup or a DIY hoop house, understanding how to mitigate blizzard damage is essential for protecting your investment and your plants.
Common Greenhouse Structures and Their Resilience
Different materials offer varying levels of protection against severe winter weather. Selecting the right structure depends on your budget and the expected snow load in your region.
- Polycarbonate Greenhouses: High-finish options, such as 30 x 36′ polycarbonate structures, provide a rigid shell that is generally more durable than film.
- Cattle Panel Greenhouses: These are often used in smaller-scale plots, such as those seen at Edible Acres II, to provide a sturdy frame for plastic covering.
- PVC Half-Hoop Designs: While lighter, some PVC “half-hoop” greenhouses have proven capable of surviving blizzards when reinforced with materials like wooden battens.
Strategies to Prevent Structural Failure
Preventing a collapse during a snowstorm requires a combination of structural reinforcement and active maintenance.
1. Reinforce the Frame
The strength of a greenhouse is only as good as its support system. Using wooden battens or additional bracing can help PVC or metal frames withstand the weight of accumulated snow.
2. Manage Snow Accumulation
Snow buildup is the primary cause of poly film tearing and frame collapse. Some growers use double-layer inflated poly greenhouses, which allow for the use of blowers to help maintain the structure. There are also designs specifically intended to help knock snow off the roof to prevent critical weight loads.
3. Material Selection
The choice of covering significantly impacts longevity. While poly film is cost-effective, it is more susceptible to tearing during high winds and heavy snow compared to polycarbonate panels.
Key Takeaways for Winter Greenhouse Care
- Inspect Regularly: Check for tears in the poly film immediately after a storm to prevent further wind damage.
- Reinforce Weak Points: Use wooden supports or battens to stabilize hoop houses.
- Active Clearing: Implement a plan to remove snow from the roof before it reaches a critical mass.
- Choose Durable Materials: Consider polycarbonate for maximum structural integrity in high-snow areas.
Frequently Asked Questions
Can a PVC greenhouse survive a blizzard?
Yes, PVC “half-hoop” greenhouses can survive blizzards, provided they are properly supported with materials such as wooden battens.
What is the benefit of an inflated poly greenhouse?
Double-layer inflated poly greenhouses provide an air cushion that can offer better insulation and structural support, though cooling solutions may be needed during warmer transitions.
Which is better for snow: polycarbonate or poly film?
Polycarbonate is generally more robust and better suited for heavy snow loads than standard poly film, which is more prone to tearing under pressure.