Plastic film is the most cost-effective material for greenhouses. In addition to affordability, it is also durable. There is no “one size fits all” when choosing a greenhouse plastic. There are several factors to consider when trying to select the correct greenhouse plastic for any operation.
How Thick Should The Plastic Be?
Plastic sheeting is measured in “mils.” A mil is equal to one-thousandth of an inch (0.001 inches). A grocery store bag is .5 mil. Greenhouse plastic typically measures between 5 and 8 mils. Some products are available with a thin twine built in the film for reinforcement and structure, and some have UV inhibitors.
Consider the geographic location of the greenhouse when selecting the correct thicknesses (mil) of film. The wind is a significant factor in plastic damage, and you don’t want to replace your plastic film multiple times a year. A thicker mil product, 6-8mil, with double the tensile strength, increases the protection of the film and crops during mild wind gusts.
Careful evaluation of the environment and the risks involved will help you select the right mil of film.