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 liverstock 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 rai |
0.5m (1’6”) |
CALCULATING YOUR SHEET WIDTH
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 |
