The Enviropro Single Span Polytunnel (5m to 9m Wide)

Our 5-piece hoop is made up of a 3-piece arch connected to a straight leg. The leg connection is located on a vertical plane meaning the hoops can withstand a heavier load. Manufacturing a hoop in this way also makes the hoop more customisable by giving the customer the ability to increase the height of the straight leg without compromising the stability of the single span.

Other manufacturers of polytunnels often have their connections on the curve of the hoop which compromises strength and allows the hoop to ‘snake’. To combat this, extra bracing brackets are used resulting in increased materials, labour and cost.

Steel is free from defects that wood has (knots, splits and bows) and will last a lifetime. All our steel profiles incorporate our unique ‘W-Wire’ polythene securing system. By simply weaving the ‘W-Wire’ into the open channel of the steel rails & frames the polythene is securely trapped in to place. ‘W-Wire’ is the easiest and quickest system on the market and doesn’t require any specialist tools.

After years of research and development we have designed a profile that has the strength of a box profile with all the features that you expect from a modern fixing system.

• T slot rear fixing for bolts
• Wiggle wire fixing of up to 3 different materials
• Keder slots for simple curtain replacement
• Strong purpose designed door frame fittings

This is a smaller section size but still retains the strength of a box profile, with the simple wiggle fixing system

• T slot rear fixing for bolts
• Wiggle wire fixing of up to 3 different materials

The strength of our brackets and fittings have been proven for over 40 years and have been specially designed and manufactured in-house. Bespoke fittings are designed to simplify the construction process, thereby reducing the construction cost.

MAGNAtube® is high-endurance galvanising treatment, giving extraordinary levels of corrosion resistance. MAGNAtube® offers up to 20 times the corrosion resistance of traditional zinc galvanising due to the combination of zinc, aluminium and magnesium.

Different crops and growing systems require different solutions, which is why we offer a range of options to suit your individual requirements and budget. Options include; doors & louvres – foundations – brace and crop bars – choice of polythene covers – ventilation systems and irrigation.

Diffused Polythene

This UV-open film allows up to 89% light transmission with approximately 95% diffusion. The diffused light penetrates deep into the plant canopy, reducing shading and promoting uniform growth. Ideal for regions with intense sunlight.

Clear Polythene

Allowing up to 92% light transmission with less than 35% diffusion, this clear film is beneficial during the early and later months of the growing season. The increased light and heat can lead to earlier harvesting and extended post-harvest shelf life.

Our ground tubes (Foundation Tubes) are 1m long, they are MAGNAtube galvanised treated with a 2.5mm wall thickness.

All of our foundation options incorporate our unique polythene cover tensioning system. The collar tensioning system enables quick and easy tensioning of the polytunnel cover.

The hoops sleeve over the foundation tubes allowing each hoop to be raised individually and locked into position after the polythene sheet has been attached. This stretches the polythene cover to create a drum-tight like cover finish. Unlike some competitors, our system allows easy tightening and slackening throughout the lifespan of the polytunnel

The best width for a commercial polytunnel depends on your growing needs, available space, and equipment. For most commercial growers, widths between 6m and 9m offer the ideal balance of working space, crop capacity, and airflow.

6m wide tunnels are great for medium-scale operations or where space is limited.

7m–8m widths provide flexibility for mixed cropping or machinery access.

9m wide tunnels are ideal for large-scale growing, offering maximum internal space for high-yield production and mechanised workflows.

At Northern Polytunnels, our EnviroPro Single Span Polytunnels are available in 5m, 6m, 7m, 8m, and 9m widths, so you can choose the size that suits your business best.

In many cases, commercial polytunnels are considered temporary structures and do not require planning permission — but this can vary by location and intended use. We recommend checking with your local planning authority before installation.

Our commercial polytunnels use high-spec UV-stabilised polythene designed for long-term use.

Installation time depends on the size and options selected. Many growers choose our professional build service, which ensures a fast and secure setup. Self-build is also possible with the right tools and experience. Call to speak with our team for an estimation.

With proper maintenance, the steel framework can last decades. The polythene cover typically lasts 5 to 10 years, depending on the type selected and site conditions.

EnviroPro Single Span Polytunnels are available in a wide range of lengths starting at 10m and going as longs as you like in set increments.

5m and 6m Enviropro Single Span polytunnels in 2.5m increments.

6m, 8m, and 9m Enviropro Single Span polytunnels in 2m increments.

Order up to 30m via our online configurator. We also supply tunnels longer than 30m – just get in touch and we’ll help you configure your ideal size.

Yes. The EnviroPro range is designed with 80x40m oval steel hoops as standard and reinforced bracing for excellent wind resistance. These tunnels are trusted by growers in exposed locations across the UK.

Absolutely. The EnviroPro range is fully customisable with manual or automatic vents, sliding or hinged doors, crop bars, irrigation systems, and ground cover. You can tailor your tunnel to suit your growing system.

EnviroPro polytunnels are suitable for a wide range of crops — from vegetables and herbs to cut flowers and soft fruit. They’re also used for tree nurseries, research plots, and propagation.

Yes — we supply and install polytunnels throughout the UK, from smallholdings to major commercial sites.