It is a little more durable and longer lasting; it can last on your greenhouse upwards of three years before it begins to turn brittle and break. It’s a great choice for high arched structures, overwintering plants, or single-season use.However, when you’re building a greenhouse that needs to withstand multiple seasons, you’re likely going to want the heavier option of 6mil plastic. This type of plastic is perfect for wrapping around different sizes and shapes of greenhouse structures, and can be framed around vents, doors, and windows. Do not sacrifice your plants zone 5 and above. If it’s in the elements for more than a few months, it’s only good for a single use as it’ll begin to deteriorate.If you are constructing a really large greenhouse or are doing a controlled growing environment, this plastic will be great. It can last for up to a decade if cared for correctly. It is actually knitted instead of just formed into sheets. This type of plastic is also available in two different strengths: commercial grade for large industrial applications and a utility grade for personal use. I created Epic Gardening to help teach As an Amazon Associate, I earn from qualifying purchases.While you're here, why not follow us on Facebook and YouTube? Types of Greenhouse Plastic Thanks to all authors for creating a page that has been read 18,207 times.wikiHow is where trusted research and expert knowledge come together. To create this article, 9 people, some anonymous, worked to edit and improve it over time. Some of these may be affiliate links, meaning we earn a small commission if items are purchased. Then, you’ll probably want something that’s thicker. However, because it’s rigid or only slightly flexible, polycarbonate will last for much longer, and provides more protection in colder winter environments.Polycarbonate is also fantastic for use when building a One other type of plastic which is used occasionally for greenhouse plastic is polyvinyl chloride (PVC). But it certainly may extend the lifespan by another year or two.There’s a lot of factors to take into consideration when choosing the best greenhouse plastic. However, it does cost more than utility grade. Anti-drip and anti-dust properties We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/40\/Make-a-Hillbilly-Greenhouse-Step-1.jpg\/v4-460px-Make-a-Hillbilly-Greenhouse-Step-1.jpg","bigUrl":"\/images\/thumb\/4\/40\/Make-a-Hillbilly-Greenhouse-Step-1.jpg\/aid1555277-v4-728px-Make-a-Hillbilly-Greenhouse-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"