UV Stabilised Polythene Explained: What You Are Paying For

 


Plain polythene left out in the sun will fail fast.

Ordinary plastic sheeting can’t take much sun before it starts to fail. A few months is often enough. It goes brittle, cracks along the fold lines, and rips apart the first time the wind gets under it. Some polytunnel plastic UK suppliers sell lasts five years. Other plastic can fall apart in one summer. There’s a reason for that gap. It comes down to whether UV stabilisers went into the mix before the plastic left the factory. Choosing the right polytunnel plastic makes all the difference.

Does polyethene resist UV on its own?

No, not without help.

Polyethene is the base material in almost all polytunnel plastic UK growers use. Without treatment, it has nothing to stop ultraviolet light attacking it. Sunlight tears the polymer chains apart at a molecular level. Photodegradation is the name for that process. Give it enough exposure and the sheet goes cloudy, then chalky, then it starts flaking off in your hand. That’s whether it’s a garden cover, a builder’s tarpaulin, or a cheap sheet bought to patch a gap.

When someone asks “is plastic UV resistant”, the answer is: only if it has been treated to UV resistance. During production, manufacturers mix UV stabilisers into the material, usually HALS (hindered amine light stabilisers) or UV absorbers. These additives soak up or neutralise UV radiation before it can attack the plastic’s structure. That’s the whole point of a UV stabilised polythene cover. It isn’t some different type of plastic. It’s the same base material, just with a defence system built in. Without that step, no amount of marketing makes it a genuine UV stabilised polythene cover.

So what stops UV from wrecking the plastic in the first place?

Three things decide that: the quality of the additive, how much goes in, and how evenly it’s mixed through the sheet.

Cheap polytunnel plastic UK often skimps on stabiliser, or spreads it unevenly through the film. That means parts of the sheet degrade faster than others. A proper UV stabilised polythene cover has the additive worked right through the film. It’s not just coated on the surface. That gap in quality is why one UV stabilised polythene cover lasts four to five years and another needs replacing after eighteen months.

Thickness plays a part too. Most polytunnel plastic UK sheeting runs between 600 and 800 gauge. Thicker film tends to last longer under load and weather. But thickness on its own won’t save a sheet with poor UV protection. A thick UV stabilised polythene cover can still turn brittle within a year if the stabiliser package is weak.

How long does polytunnel plastic actually last?

Buy a properly specified, genuine UV stabilised polythene cover and you can expect four to five years under normal UK conditions. Some heavier grades push past that. Budget sheeting without proper stabilisation can fail within a single growing season. South-facing tunnels that catch the most sun suffer worst.

This is worth knowing before you go shopping. Search results for polytunnel plastic UK listings on eBay turn up a huge range of prices, and price alone won’t tell you what you’re getting. Watch out for listings that skip any mention of UV stabilisation, or just say “heavy duty”. That kind of cover probably won’t protect you past a season or two. Any genuine polytunnel plastic UK seller should be happy to confirm the stabiliser spec in writing.

What is the best plastic for a polytunnel?

For most UK growers, maybe, a three-or-four-year UV stabilised polythene cover in 720 to 800 gauge is the sensible middle ground. Commercial growers running multi-span sites often choose a higher spec UV stabilised polythene cover. A cover failing mid-season can wreck a whole crop. Smallholders and home growers can usually get by with a lighter grade. It just needs to be suitably stabilised.

Check for a stated UV guarantee in years, with a “UV protected” label and ask what gauge it is. If you are replacing a cover, measure your frame accurately. A badly fitted polytunnel plastic UK sheet will incur problems. When you’re comparing polytunnel plastic UK options, always ask for the stabiliser details before you ask about price.

Request a quote at www.polytunnelsrus.co.uk if you want an answer on what UV stabilised polythene cover suits your tunnel and your budget.



Read More:

Do You Need Planning Permission for a Polytunnel? What the Rules Really Say

Sourcing Polytunnel Covers Near You:

Comments

Post a Comment

Popular posts from this blog

Fresh and Organic Produce Grown In Polytunnels

Image
  We rely on small and commercial polytunnels to cultivate a raft of crops and plants, from small polytunnel kits to multiple giant-sized housings. All may require the additional services of companies that provide major repairs, total polytunnel refurbishment services, or installation and construction services. UK growers need these vital services, whether for commercial polytunnel purposes or medium and small polytunnel kits. We significantly rely heavily on fresh produce and food imports to meet our ever-developing taste and produce demands, sourcing from a diverse range of countries. Some of our top suppliers of food products include France, Italy, Africa, Germany, Chile, Ireland, and the Netherlands. Both Spain and South Africa majorly contribute, with Spain exporting thousands of tonnes of various fresh fruits and crops. Morocco, Turkey, and Peru have also increased exports, particularly spices, herbs, and fruits, such as berries and avocados. One of the reasons why polytunnel...
Read more

Polytunnel Services Ensure Quality and Optimal Performance

Image
  Professional polytunnel companies understand why their services are so important from polytunnel repairs and replacement coverings, to extensions and full polytunnel refurbishments. Due mainly to the nature and locational areas these outdoor housing products are placed. Companies understand the environmental stress these structures and their covers are put under to meet the demands of commercial operators and other business operations require from them. From general maintenance, cleaning or painting covers to new installations and constructions, they ensure the longevity and functionality of these vital housings. Polytunnel companies also provide bespoke design and installation of swimming pool-covered areas to walkways and canopies required for various retail businesses or outlets. These services cover diverse commercial operational needs, down to individual growers or farmers, in providing protective, aesthetical and cultivational uses, and ensuring operational efficiency.​ ...
Read more

Bespoke & Commercial Structures Require Experience & Equipment to Install

Image
  Polytunnel companies that provide installation and construction services for bespoke and larger commercial polytunnels, using a heavier and bigger range of materials to complete them are a recognised and complex process, that demands specialised knowledge, advanced tools, equipment, and precise, meticulous planning. These projects differ significantly from smaller builds, such as garden-sized or allotment structures in terms of their build scale and the construction resources required. Understanding the significant differences highlights why experienced tradesmen and proper tools are indispensable for larger and multiple complex commercial polytunnels, concerning installation and construction.   1. Scale and Weight of Materials The most obvious distinction between heavier commercial polytunnels and bespoke structures rather than smaller builds, is the scale of the project and the grade and thicker materials involved. Polytunnel companies are often asked to develop, bes...
Read more