Replacement Polytunnel Covers
• Polytunnel covers with 8- to 10-year lifespans
• 4- or 5-year warranties
• 5-star rating from our customers on Google
Keep your growing space performing at its best with replacement polytunnel covers that protect crops and support healthy growing conditions. Choose from durable Thermal Anti Drip polythene films or long-lasting net covers, backed by trusted warranties and supported by a 5-star rated service on Google.
Use our replacement cover calculator below to find the right size for your project and order with confidence.
Using our measuring guide, please enter the information to calculate your cover size and cost.
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Types of polytunnel covers
Thermal Anti Drip
Covers
We pride ourselves on offering the very highest quality of Thermal Anti Drip polytunnel covers - the preferred polythene of UK growers. Our polytunnel polythene films are the first in the UK to include NEW 5-layer co-extrusion technology. This innovative system protects against disease and excess moisture, prevents heat loss, enables effective light diffusion and stops dust from gathering.
Choose from the following polytunnel replacement covers: 600 gauge/150 micron polythene film with a 4-year warranty against UV degradation, or a 720 gauge/180 micron polythene film with an extended 5-year warranty.
Net Covers
Our one-piece sewn net polytunnel covers are built to last, with an impressive 8- to 10-year lifespan. Made from 47% shade netting, they protect crops from birds and insects.
Used on their own, net covers provide shade and full ventilation, reduce wind speeds, and allow rainwater to reach your plants. When fitted over a polythene cover, they help increase shade and significantly lower temperatures inside the polytunnel, creating a more comfortable growing environment.
Is there a good time of year to replace my polytunnel plastic?
You'll probably have a good idea when the time's coming up to replace your polytunnel cover and ideally, you'll want to wait for a warmish day to do it, as it makes the polytunnel plastic more flexible. It's not essential though, especially if you have the option to re-tension the cover after fitting. However, to make the task as straightforward as possible, wait for a calm, non-windy day. Why not read our blog on covering a polytunnel for more tips.
Don't forget, our polytunnel covers are made to last - the polythene we use for our covers is specially developed to resist UV degradation for up to 5 years, although it’s not uncommon for them to last for up to 10 years. When the time eventually comes to replace your polytunnel cover, you can do so quickly and easily at Premier Polytunnels.
Polytunnel cover FAQs
Our friendly team is always here to answer your questions and offer expert advice. Here are a few questions we're commonly asked about replacement covers for polytunnels.
Sophisticated polythene films contain a number of special chemical additives which make up the many properties of the films. These include light diffusion, stabilisation against UV breakdown, thermal and anti drip properties, blocking of ultra violet radiation, anti mist, and others. In addition, the films are often produced using more than one base resin.
Until the introduction of multi-layer extruders more than 25 years ago, the additives and resins were all mixed in together in the one and only layer that was available at the time.
However, among the additives there are those which are incompatible or, when mixed together, give undesirable results such as haziness or reduced transparency. It was recognised that for a polythene film to be as efficient as possible it was necessary for a particular additive to perform on the upper or lower layer of the film and not randomly wherever it was found.
The multi-layer co-extrusion technology (first 2-layers and later, 3-layers) allowed polythene producers, to a certain extent, to place materials where they need to be. It also allowed them to separate particular additives that were incompatible into different layers.
In 2001, Premier Polytunnels’ polythene extruders installed the first large-size 5-layer extruder, allowing the additives within the film to be divided more evenly still – making for an even more efficient polytunnel cover.
No, polytunnel covers are a single piece of polythene that's pulled over the frame and secured at ground level and around the door frames. This design creates a secure, durable covering for the entire structure, helping to protect crops and growing conditions.
Yes, the Thermal Anti Drip polythene must be placed with the Anti Drip side facing inside.
To make this as clear as possible, you can find the word 'INSIDE' within the logo on every cover. When you're inside the tunnel, as long as you can read that word the right way round, then the cover is also the right way round.
It's important to get this right as the inside of the polythene film includes Anti Drip additives, which help prevent large droplets from forming and dripping back into the tunnel, while the outside includes Anti Dust additives, making it harder for dust to stay on the polytunnel plastic.
No - although a warm day is preferable as this gives the polytunnel plastic more flexibility, a warm day is not essential to get the cover tight, especially if you have the option to re-tension the cover after fitting.
A calm day is without doubt necessary as you are effectively opening a large sail.
Find out more about covering a polytunnel here.
Polytunnel covers are strong and will not readily tear or split. However, puncture holes can occur if there's contact with a sharp object.
Tears can be repaired with a UV-resistant polytunnel repair tape, returning the cover to its original effectiveness and ensuring it reaches its original lifespan.
The UK's Trusted Polytunnel Partner
From quality British manufacturing to ethical employment practices, Premier Polytunnels is proud to hold industry-leading accreditations.
