The popularity of 6 mil thickness in greenhouse plastic sheeting comes from years of agricultural use that proved its reliability under a wide range of climates. Thinner plastics often tear too easily or fail under prolonged UV exposure, while thicker materials can become too heavy, costly, or difficult to install. 6 mil thickness sits in the middle, offering strength to withstand str... https://greenhouseplastic.com/product/hoop-house-poly-plastic/