Tunnel film Durathermic™ Diffused

polyethylenetransparent

Short description
This UV-open diffusing film transmits up to 89% of light while providing approximately 95% diffusion. Diffused light penetrates deeper into the crop canopy, reducing shading and promoting uniform growth. Suitable for polytunnels and high-sunlight regions.

Sales & ordering
Sold by the metre. Set quantity to the required length. Minimum order length: 5 m. Maximum order length depends on sheet width:

• 7.3 m wide: 45 m max length per order
• 9.2 m wide: 35 m max length per order
• 11.1 m wide: 30 m max length per order
• 14.1 m wide: 25 m max length per order

Volume discounts available for bulk purchases.

Key features

• Light transmission up to 89%
• Diffusion approximately 95% to scatter light through the canopy
• Durathermic additive reduces mid-day temperatures by approximately 2–4°C
• Anti-Drip condensation control to minimise droplet formation and dripping onto plants
• 5-year incremental guarantee; expected lifetime commonly 12–14 years in normal use

How it works
Light-diffusing polythene scatters incoming sunlight so crops receive illumination from multiple angles rather than only direct sun. This increases effective light penetration into lower canopy layers, reduces shading from upper foliage and improves light availability at low sun angles (morning, evening and winter). The Durathermic additive promotes formation of a uniform thin water film that runs off the sheet instead of forming droplets, reducing light loss and drip damage.

Sheet allowances (fixing method)
Fixing method | Add per side (approx.)
Trenching into the ground | 1 m (3 ft)
Fixing to a base rail | 0.5 m (1.5 ft)
Fixing to a side rail | 0.5 m (1.5 ft)

Guidance: sheet width by tunnel width
Width of tunnel | Trenched | Base Rail | Side Rail
8 ft (2.44 m) | 9.2 m | 7.3 m | 7.3 m
10 ft (3.05 m) | 9.2 m | 7.3 m | 7.3 m
12 ft (3.66 m) | 9.2 m | 9.2 m | 7.3 m
14 ft (4.27 m) | 9.2 m | 9.2 m | 7.3 m
16 ft (4.90 m) | 9.2 m | 9.2 m | 7.3 m

Caractéristiques / spécifications techniques

• Light transmission: 89%
• Diffusion: 95%
• Thickness: 180 µm (≈720 g/m²)
• Thermicity: 80–85%
• Anti-Drip: reduces condensation droplet formation and encourages uniform thin-film drainage
• Guarantee: 5-year incremental guarantee
• Expected lifetime: typically 12–14 years under normal use
• Sold by the metre; minimum order 5 m