Greenhouse Poly Film for Commercial Greenhouses
Our greenhouse poly film solutions are built around high-performance greenhouse polyethylene film engineered to maximize light transmission, control condensation, and extend service life in demanding climates. Designed for 7.2 mil double poly greenhouse coverings, our films combine advanced materials science with proven durability for professional growers.
The greenhouse polyethylene film used by Harnois is manufactured using advanced 8-layer technology, specifically optimized for 7.2 mil double poly greenhouse systems. This construction delivers consistent performance across light transmission, thermal efficiency, and long-term durability.
Key performance objectives:
Maximize usable light for crop growth
Prevent condensation and mist formation
Maintain flexibility and strength in cold conditions
Extend greenhouse covering lifespan
Clear greenhouse poly film (7,2mil)
Product type
IMPORTANT NOTICE : it is the client’s responsibility to properly evaluate the size of greenhouse film needed. No returns are accepted for this product.
Note: Pricing varies by project and order volume. This list is provided for product identification only.
Details
The Longest-Lasting Anti-Drip Film on the Market
Our greenhouse poly film is developed with exclusive 8-layer nanotechnology, delivering industry-leading anti-drip performance, even in very low temperatures or on flatter greenhouse roof slopes.
Benefits and features
- Excellent light transmission (90–91%)
- Efficient thermal insulation
- Multi-year service life without loss of anti-drip efficiency
Long-lasting anti-drip treatment
No mist formation at dawn or dusk
Increased light transmission
Maintains performance at very low temperatures
Suitable for low-slope greenhouse roofs (< 30°)
Thanks to its nanotech surface layer, our poly preserves its anti-drip treatment over several seasons, reducing humidity-related stress, fungal disease risks, and yield loss.
Greenhouse Poly Film
Patented Technology for Double Poly Greenhouses
Our poly is designed specifically for double poly greenhouse coverings. During installation, the 8-layer film separates into two layers through an air-inflation process, simplifying installation while improving overall performance.
Once installed:
Outer layer: Transparent, highly durable, optimized for maximum light transmission
Inner layer: Thermo-regulating film with integrated anti-drip technology, available in clear or diffused options
Advantages for Commercial Growers
Faster and safer double-poly installation
Optimized thermal insulation and light diffusion
Reduced labor costs during installation
Designed for long-term energy efficiency and durability
A Structure + Greenhouse Poly Film Combination Designed to Last
At Harnois, greenhouse covering performance is not evaluated in isolation. The longevity of a greenhouse polyethylene film depends heavily on the structure it is installed on.
Our greenhouses are engineered with oval-shaped arches, a geometry specifically designed to reduce premature wear on greenhouse poly film.
Why Oval Arches Matter
Allows the greenhouse poly film to slide naturally under wind or snow loads
Minimizes friction points that accelerate film degradation
Eliminates sharp corners found in square or angular tubing
Reduces stress concentrations that can damage the film
Result: Longer greenhouse poly lifespan and fewer premature replacements.
When combined with advanced films, Harnois structures deliver a truly long-term greenhouse covering solution.
When to Replace Your Greenhouse Polyethylene Film?
Replacement timing depends on:
Weather-related wear
Declining light transmission
Degradation of surface treatments (anti-drip, anti-UV)
Changes in crop or production requirements
With the latest generation of greenhouse poly films, service life is significantly extended, ensuring consistent performance over multiple seasons.
Tips
Calculation of the required dimensions of polyethylene
Type of your greenhouse:
- PolyTunnels
- Freestanding
- Gutter Connected
- Other
Tube size:
- 1-5/8”X 2-3/4”
- 2”X 3-9/16”
- 2-3/4”X 4-5/16”
- Other
Roof vent:
- None
- Mid roof vent
- Double ridge vent
- Singel ridge vent
Size of your greenhouse:
- Half-Moon (A)
- Half-Moon (A2)
- Length (B)
- Width (C)
- Height (D)
- Height (E)
Type of covering:
- Single poly
- Double poly
Exterior siding:
- White
- Clear
Interior siding:
- White
- Clear
- Anti-drip