The main function of hoop house plastic is to form a protective barrier that filters sunlight, traps heat, and maintains an even temperature inside the structure. When stretched over a steel or PVC frame, hoop house plastic acts as a lightweight but tough cover that moderates external conditions. During colder months, it helps retain heat through infrared additives or multi-layer cons... https://greenhouseplastic.com/product/hoop-house-poly-plastic/