Overwintering Film 6 Mil Clear Plastic Film - Durable Greenhouse

In this review of the Overwintering Film from Farm Plastic Supply, the bottom line is simple: gardeners and small commercial growers who need a durable, heat-retaining greenhouse cover will find this product effective. The film is aimed at winter protection and energy conservation, and its single biggest strength is the way it holds heat while providing controlled light transmission so plants avoid cold stress. It reads as a practical, workmanlike solution rather than a decorative covering, and the review focuses on how it performs for frost protection and year-round greenhouse stability.

Key Features

• Energy conservation: The film reduces heat loss from the greenhouse, helping to lower supplemental heating needs and cut energy costs in colder months.
• Light diffusion: Made from opaque plastic that diffuses incoming light, it reduces harsh direct rays and eliminates deep shadows for more even canopy illumination.
• 55% light transmission: The specified light transmission keeps a consistent interior temperature by reducing hot spots and cold spots across the bench or bed.
• Plant protection: By shielding plants from extreme cold, frost, and wind, the film helps maintain stable growing conditions that support healthier growth and better yields.
• Strong material: Constructed from durable opaque plastic, the sheeting resists wear from handling and the elements for longer service life.

Who It's For

The film is best for hobby growers, market gardeners and small greenhouse operators who need an affordable way to overwinter tender plants and reduce heating bills. Its 55% light transmission and diffusion properties suit leafy greens, seedlings and other crops that need steady light without scorching or shadowing.

It is less appropriate for operations requiring maximum clarity or passive solar gain where higher light transmission is essential, or for decorative hoop houses where appearance is a priority rather than utility.

Pros & Cons

Pros

• High build quality and perceived durability make it easy to handle and long lasting.
• Effective at conserving energy by retaining heat, which can lower winter heating costs.
• Light diffusion and 55% transmission provide even lighting and temperature control for sensitive crops.

Cons

• Opaque construction means it does not offer the maximum possible light clarity for sun-loving crops.

Specifications

Product type	Overwintering greenhouse film
Thickness	6 mil (sold as 4 mil 12' x 100' variant)
Light transmission	55%
Material	Durable opaque plastic sheeting
Primary benefit	Energy conservation and frost protection
Intended use	Greenhouse covering and plant overwintering

Our Verdict

For growers seeking a practical overwintering cover that balances heat retention and even light, this film is a solid value. It performs well where frost protection and energy savings matter most, and its durable construction means fewer replacements. Choose a different film only if you need higher clarity or maximum sunlight transmission for full-sun crops.

Frequently Asked Questions

Will this film help reduce my heating bills?
Yes. The film reduces heat loss by retaining interior warmth, which lowers the need for supplemental heating in winter.

How much light do plants receive through the film?
The film transmits about 55% of light and diffuses direct rays to prevent hot spots and shadows.

Is the material easy to handle and install?
Customers report the plastic is durable yet manageable to cut and install on greenhouse frames.