Description
Designed for specificaly for Polytunnel Covers, Lumisol Clear polythene allows around 2% more light to enter your polytunnel than with a diffused polythene cover. This extra light brings extra heat which can be a benefit during the early and late months of the growing season. Especially popular in northern and western regions where lower light levels naturally occur.
Visqueen’s new generation polythene films combine all the benefits of previous films (great thermic and light transmission properties), but unlike normal greenhouse films (and glass) which prevent short wavelength UV light (UVB) from reaching your crop, this ‘UV open’ film allows UVB to enter the greenhouse.
This can have many benefits for both edible and ornamental crops, such as enhancing the fragrance, taste, colour, earlier harvesting and longer post-harvest shelf life. In addition, ‘UV open’ films pro mote plant anti-oxidants which are good for health & encourage stronger plants. This greatly benefits plant raisers and young plant growers as stronger plants can be easier to plant out thus saving time and money.
Our polytunnel covers are 180 micron (720g) thickness, and have a 5 season incremental guarantee against UV degradation. However, it’s not unusual for our covers to be replaced after 10-12 years (or even longer).
- Light transmission: 88-92%
- Thickness: 720g (180 micron)
- Thermic effect: 80-85%
- Diffusion: 30-35%
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 |
