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

Designed for Commercial Growers Who Demand Reliability

Engineered for durability, efficiency, and maximum yield, the EnviroPro Single Span Polytunnel is the next evolution in commercial growing. Designed to BS EN 13031 Standards with an advanced steel framework and optimised ventilation, it provides the ideal environment for large-scale horticulture.

High-strength 80x40mm oval hoops
Superior brackets & fittings
Customisable to your needs
Robust 2.5mm Wall MAGNAtube® coated Steel foundations
No timber, no rot
Cover tensioning system to ensure a drum tight finish
Wind & snow load tested for exposed sites

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EnviroPro Single Span - 6m commercial polytunnel

80mm x 40mm Oval Profile Tube Hoops as Standard

At the core of every EnviroPro Single Span Polytunnel is our 80x40mm flat-sided oval profile tubing, delivering unmatched strength, stability, and ease of construction. Unlike traditional round tubes, our oval hoops are designed for commercial growers who need efficiency and durability.

Easier to Construct

The oval shape prevents rotation when connecting components, making assembly faster and more secure.

Superior Strength

The 80x40mm profile provides exceptional load-bearing capacity, ensuring long-term durability.

Corrosion Resistant

MAGNAtube® steel offers up to 20x more corrosion resistance than standard galvanising, using a zinc-aluminium-magnesium coating.

This high-performance tubing is used across our commercial single-span range, from 5m to 9m widths, ensuring every grower benefits from the best structural integrity available.

Made in Britain logo

Designed to BSI Standards

Britain’s Toughest Polytunnel? We know that’s a bold claim but we back it it up. 💪

Our all-metal frames are made to BSI Standards (BS EN 13031), our exclusive oval tubing is designed for serious strength, and our tensioning system keeps the polythene drum-tight – so there’s less chance of it flapping, tearing, or giving in to the great British weather.

Demonstration of oval tube

Designed to BSI Standards

Britain’s Toughest Polytunnel? We know that’s a bold claim but we back it it up. 💪

Our frames are made to BSI Standards (BS EN 13031), our exclusive oval tubing is designed for serious strength, and our tensioning system keeps the polythene drum-tight – so there’s less chance of it flapping, tearing, or giving in to the great British weather.

Customise Your Single Span Polytunnel for Maximum Performance

No two growing operations are the same, which is why the EnviroPro Single Span Polytunnel is fully customisable to meet your exact needs. From ventilation and climate control to reinforced covers and bespoke access points, you can configure your tunnel for optimal growing conditions – no matter your crop or location.

Build It Your Way with a Range of Options

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Sized to Suit

Choose from widths of 5m to 9m and unlimited lengths – each engineered with robust materials to deliver reliable performance at scale.

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Secure Foundations

2.5mm thick foundation tubes offer long-term stability and corrosion resistance – suitable for soil or concrete bases.

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Tailored Irrigation

Integrate a tailored irrigation system for year-round growing efficiency. Can be controlled via timer for hands free watering.

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Climate Control

Create the perfect environment with vents, heating, and automation options – protect yield in every season.

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Quality Covers

Choose from clear, diffused or twin-skin for thermal efficiency. Specifically formulated for the UK climate.

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Bespoke Gables

Configure doors and ventilation your way, with sliding aluminium doors, louvre vents, and finish options to suit your workflow.

💡 Start Customising Your Build Today

Design the perfect tunnel for your business with our range of premium options and size customisations. Use our online configurator or call 01282 873120 to speak to our team.

Start Customising

Engineered for the Elements

Every EnviroPro tunnel is designed with the British climate in mind. From strong winds to heavy snowfall, we build with structural integrity at the core, ensuring your tunnel stands up to challenging weather conditions year after year.

Our team considers wind and snow load performance in every design, with optional reinforcements available for more exposed sites. Whether you’re on the coast or at altitude, we’ll help you configure a tunnel that’s built to withstand your environment.

Technical Specification

EnviroPro Single Span Technical Specifications

Not all Polytunnels are Built the Same

Northern Polytunnel Hoop Design

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.

Wiggle Wire Aluminium Fixing Profiles

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.

Steel Side Rail And Door Frames

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

Steel Base Rail

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

Superior Brackets And Fittings

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® Steel

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.

Configurable Options

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.

configurable options

Durathermic Polythene

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.

Foundations

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

Cover Tensioning System

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

What is the best width for a commercial 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.

Do I need planning permission for a commercial polytunnel?

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.

What kind of polythene is used on commercial polytunnels?

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

How long does installation take?

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.

What’s the lifespan of a commercial polytunnel?

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.

What length can I order for a commercial polytunnel?

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.

Can polytunnels withstand strong winds?

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.

Can I customise my polytunnel with doors, vents, or irrigation?

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.

What crops are suitable for growing in a commercial polytunnel?

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.

Do you deliver and install nationwide?

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

By ordering from us you can expect

Consultation

Tailor your structure and internal systems to meet your exact needs.

Bespoke Design

Advanced 2D & 3D modelling, structural analysis, and full project engineering support.

Manufacture

Precision-built in our 2,000m² UK facility, processing 1,200 tons of steel annually.

Delivery

Reliable nationwide delivery from our 10,000m² dispatch hub and dedicated fleet.

Construction

Expert on-site project management with specialised equipment for efficient installation.

Aftercare

Ongoing support and maintenance to ensure long-term performance.