Description Ideal for crops that require cooler daytime temperatures such as nursery stock, ferns and conifers; also ideal for overwintering hardy shurbs and general hardening off; the White UVI polythene allows just 60-70% light transmission enabling shade when and where it is needed most. Despite the 720g (200µm) thickness, and 32-33% diffusion, the White UVI polytunnel covers enable higher overnight tunnel temperatures to encourage plant growth, and reduce plant losses. Great energy savers through the heat retention, the White UVI polythene is also widely used through the agricultural sector for livestock housing and general storage purposes. HOW MUCH POLYTHENE DO YOU NEED? Are you looking at replacing your polythene? Be it diffused or clear, we’ve got the best polythene around. But do you know how much you need? Our handy guide below is here to help CALCULATING YOUR SHEET WIDTH First you need to know the width of your polytunnel. If you’re not sure of the width or height, you should measure the circumference of the polytunnel (A) and then make the following allowances: Fixing method Add per side (approx. Trenching into the ground 1m (3ft) Fixing to a base rail 0.5m (1’6”) Fixing to a side rail 0.5m (1’6”) CALCULATING YOUR SHEET LENGTH Once you’ve measured the length of your tunnel (B) you need to make an allowance for the ends, especially if your cover is fixed to the door frames rather than clipped on to the end hoops. The width of the structure (C) and the width of the doors are the main considerations. As a general rule when fixing to the door frames you should add 2m (6ft 6in) per end, so for a 6.1m (20ft) tunnel you would order a 10m (33ft) long polythene sheet. For a 14ft (4.27m) wide polytunnel with single doors at both ends, you would be wise to add another extra metre to be safe. Use the below table for guidance: Width of tunnel Trenched Base Rail Side Rail 8ft (2.44m) 9.2m 7.3m 7.3m 10ft (3.05m) 9.2m 7.3m 7.3m 12ft (3.66m) 9.2m 9.2m 7.3m 14ft (4.27m) 9.2m 9.2m 7.3m 16ft (4.9m) 9.2m 9.2m 7.3m You may also need... Add to basket Zinc 100mm Tower Bolt £1.89 excl. VAT | £2.27 incl. VAT Add to basket Ball Bungee £0.89 excl. VAT | £1.07 incl. VAT Add to basket Bungee Hook / Sando Stop £1.68 excl. VAT | £2.02 incl. VAT Select options Hexagon Setscrew M8s £0.04 excl. VAT | £0.05 incl. VAT Select options Omega Spring Clips £0.27 excl. VAT | £0.32 incl. VAT Select options Double Swaged Joint £2.98 excl. VAT | £3.58 incl. VAT Add to basket Timber Joint Plate 90 Degree Short £2.51 excl. VAT | £3.01 incl. VAT Select options Rubber Backed Washers PK 25 £1.70 excl. VAT | £2.04 incl. VAT Add to basket Timber Nail Plate Flat £1.91 excl. VAT | £2.29 incl. VAT Select options Serrated Flangenut £0.05 excl. VAT | £0.06 incl. VAT Select options Sleeve Anchor £0.37 excl. VAT | £0.44 incl. VAT Select options Nails £0.00 excl. VAT | £0.00 incl. VAT
