Greenhouse cover thickness is a critical feature of your polyethylene cover, and growers unsure of the thickness they need should consult experienced and knowledgeable professionals.
The right mil thickness of a greenhouse cover really depends on weather conditions.
Greenhouse covers are typically offered in a range from 6 mil – 12 mil, with the most common greenhouse cover thickness being 6 mil. It’s important to note that, when it comes to plastic sheeting, “mil” is not a millimeter, but a unit of measurement equalling one one-thousandth of an inch. For instance, .006 could also be read as 6 mil. An Imperial millimeter is approximately 39 mils thick. A thickness gauge can help you determine the thickness of your plastic sheeting.
What Thickness Does My Greenhouse Cover Need to Be?
Generally, a thicker cover offers increased strength and durability. However, added thickness also adds weight to the overall product, making it slightly more expensive to ship.
Related Article: How to Install a Greenhouse Cover
Weather Conditions
Thicker greenhouse covers should be used where the weather conditions are windy and the greenhouse is subject to seasonal changes. Consider a reinforced greenhouse cover like SolaScrim™. Growers should keep in mind that, in hot weather conditions, metal frames can cause stress to the plastic, in addition, PVC off-gassing can also damage your cover. You can avoid contact damage from any frame material by applying a felt barrier which reduces the deterioration. Additionally, UV inhibitors prevent the greenhouse cover from deteriorating when exposed to UV rays for extended periods of time.
Related Article: Greenhouse Cover Tips: Should I Repair it or Replace It?
Does Greenhouse Cover Thickness Have Anything to Do With Longevity?
As a general gauge, 2 to 5 mil film is common for one year use on narrow tunnels and overwintering houses. Four-year greenhouse covers typically start at 6 mil. There are additional features like string reinforcement that can extend the life of a greenhouse cover.
String reinforced sheeting can increase durability without increasing thickness, lengthening the life of your greenhouse cover. When additional strength is needed, such as in high wind locations, a woven poly or nylon scrim-reinforced material should be considered. Growers can quickly and inexpensively repair torn greenhouse covers with Reinforced Greenhouse Repair Tape to buy some time until your next replacement cover.
Americover is the premiere plastic sheeting provider for the nation. Growers can maximize their investment by choosing the right cover for their unique needs and environment. Other tips to extend the life of the cover is to keep it clean and clear of debris, and place a barrier between the cover and the frame. Growers can ensure that they have the best materials when they consult our experts with over 30 years of experience.
| Learn more about SolaScrim™ 4 Year 10 mil Clear Reinforced Greenhouse Cover | Learn more about Clear Woven Plastic Film | Learn more about Reinforced Greenhouse Repair Tape |
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