Superior Brackets & 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.
ArmourGuard® Steel
ArmourGuard® is NP Structure’s newly developed high-endurance galvanising treatment, giving extraordinary levels of corrosion resistance. ArmourGuard® 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
- irrigation
BPI Polythene
Visqueen’s British made polythene allows UVB to enter the greenhouse unlike normal glasshouse films and glass. This has many benefits including enhancing the fragrance, taste, colour of crops with the added advantage of earlier harvesting and longer post-harvest shelf life. It also has a unique condensation reduction additive to further reduce light-loss.
Our polythene is guaranteed for 7 years*
Foundations
Our ground tubes (Foundation Tubes) are 1m long, they are ArmourGuard galvanised treated with a 2.5mm wall thickness. The image above shows a ground tube concreted in with a retaining bar to hold it securely.
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
Northern Polytunnel Hoop Design
Our 4-piece hoop is made up of a 2-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
Aluminium is free from defects that wood has (knots, splits and bows) and will last a lifetime. All our aluminium profiles incorporate our unique ‘W-Wire’ polythene securing system. By simply weaving the ‘W-Wire’ into the open channel of the aluminium 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.
Aluminium 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.
Aluminium 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