The Superbay's impressive construction maximises air volume to create a natural growing environment that priorities plant health and extends your growing season. 


Advancements in the design and technology of The Superbay mean that polyhouses now provide an effective alternative to glasshouses. Hoop curvature gives an improved angle of incidence and maximises light penetration in comparison to a pitched roof. The lower initial outlay ensures a better return on investment than a glasshouse of a similar specification. 


The Superbay has been designed with the erratic British weather in mind. Increased ventilation for the summer months and inflated skins for the winter months can reduce heating costs. 


It's robust steel construction, MAGNAtube® coating and unique polythene tensioning system maximises product lifespan.  Superbay structures can be modified or added to as needed, future-proofing your purchase. 

Key Features

Natural Climate Control

45% more air volume creates a slower temperature curve and greater availability of CO2

Extra Interior Height

Up to 4m height allows for screens, irrigation and offers easy machine access

Effective Ventilation

Easy to add side and/or roof ventilation as necessary

Hoop Bridges

16ft internal bay spacing allows for more crops ensuring maximum yield and productivity

Designed To EN13031

Greenhouse Standard EN13031 ensures durability against wind and snow loadings

Cover Tensioning

An easy-to-use tensioning system ensures a drum tight cover, extending the polythene's lifespan

What To Expect From Us


Tailor the structure and internal systems to suit your needs

Bespoke Design

2D & 3D Modelling, structural analysis and project engineering support.


2000m2 UK facility with the capacity to process 1,200 tons of steel structures per annum.


10,000m2 dispatch area and fleet of delivery vehicles.


Experienced on-site project management and specialist equipment for optimum efficiency.


Ongoing support and maintenance.

Technical Specification

High capacity and robust build quality ensures our gutters are able to cope with the rigors of the UK climate. 45° outlet allows water to discharge from the gutter and away from the structure quickly, reducing the chance of blockages.

80 x 80mm Galvanised Steel Box-Section Legs and MAGNAtube 60mm Pre-Galvanised Steel Hoops

Clear, Diffused or Twin Skin Covers Available - Only the highest quality, British manufactured polythene covers

Commercial Grade Sliding Doors - A number of heavy-duty door options available, single or double sliding doors up to 3.5m high. Our heavy-duty options are made with robust door track, brush strip seal for draught exclusion, and Zinc Nickel plated door latches & handles. Available with glass clear PVC vision panel as standard and optional upgraded galvanized lower panel.

Standard Sizes

Standard Sizes

Span 9.6m
Internal Spacing 2.4m 4.8m
Gutter Height 3m 3.5m 4m

Customisable Options

Irrigaton & Climate Screens

A Choice of Overhead Spray Lines or custom solutions for Boom Irrigation. Easy to install with bespoke Climate Screen solutions based on unique requirements. 


Heating & Twin Skinning

A range of Heating Solutions can easily be incorporated into our structures. Twin Skinning traps the air between two layers of Polythene resulting in a 30% reduction in heat loss. 

Ventilation & Automation

A Choice of Ridge, Gutter or Side Venitilation allowing for a more harmonised enviroment. Automation allows for accurate control of Venilation, Irrigation and Climate screens whilst also measureing Wind Speed & Light. 

Superbay, Commercial Horticulture, Northern Polytunnels

Construction Service


Have your structure built with confidence. NP Structures have been providing construction services for over 20 years. We can accurately quote your project and ensure that you are getting quality work at a fair price. 


Our dedicated Construction Manager will liase and co-ordinate your build. From scheduling a contractor, through to hiring plant and ensuring the finished build is to specification and quality. This will all be handled by us. 


Still want to build your structure yourself? Our specialist plant equipment is also available for hire. Request a callback for pricing and availability.