Tunnel film Durathermic™ Clear

polyethylenetransparent

Short description
Due to its clarity, Durathermic Clear Polythene allows around 2% more light into a polytunnel than diffused polythene, providing additional heat that benefits early- and late-season production.

Ordering and sizes
Sold by the metre. Adjust quantity to select required length. Minimum order length: 5 m.

• 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 m wide: 25 m max length per order

Product details
Designed specifically for polytunnel covers, Durathermic Clear Polythene transmits approximately 92% of light and allows around 2% more light than diffused films, increasing internal heat helpful in early and late growing periods, particularly in northern and western regions with lower light levels. The film is UV-open and permits short-wavelength UV (UVB) to reach crops, unlike many greenhouse films or glass that block UVB.
Benefits of UV-open transmission include enhanced aroma, taste and colour of edible crops, earlier harvests, extended post-harvest shelf life, stimulated plant antioxidants and stronger plant structure—advantages for plant raisers and young-plant producers.
Sheets are 180 µm (720 g) thickness with a 5-season incremental guarantee against UV degradation; practical lifespans of 10–12 years (or longer) are common under correct use.

Fixing allowances (add per side)
Fixing method | Add per side
Trenching into the ground | 1 m (3 ft)
Fixing to a base rail | 0.5 m (1'6")
Fixing to a side rail | 0.5 m (1'6")

Sheet length guidance (examples)
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 (4.9 m) | 9.2 m | 9.2 m | 7.3 m

Notes
Tiered pricing with incremental discounts is available for bulk orders.

Technical specifications

• Light transmission: 92%
• Thickness: 720 g (180 µm)
• Thermic effect: 80–85%
• Diffusion: 35%
• Unit sold: by the metre
• Minimum order length: 5 m
• Guarantee: 5-season incremental guarantee against UV degradation
• Typical lifespan: commonly replaced after 10–12 years (can be longer)