National Polytunnels are leading designers, manufacturers and suppliers of polytunnel structures to growers and Garden Centres.We offer a wide range of Polytunnels with design features that are unique to National Polytunnels. Our tunnels are the result of 25 years experience in the industry and are designed for strength and ease of construction. Developing designs using Z35 steel, a superior grade of structural steel, National Polytunnels have continued to work with material suppliers and end users to refine our structures to providing longer life and better cropping environments.Our comprehensive range offers structures to suit most of our clients'​ requirements. We also offer a design service to aid those customers who require a "tailor made"​ structure or a combination of special features. This is aimed at ensuring that your structure is right for your business.We offer technical drawings, plans and the benefit of our knowledge including rich experience in working with Nurseries, Garden Centres and Architects around the world. Our factory is equipped with the latest in computerised forming machinery which ensures that we maintain the consistency and high quality of our products for which we are known.This also means that alterations to standard specifications can readily be made to suit customer requirements and that our factory can produce "one-offs"​ for our clients. Our technical sales staff at Head Office are computer aided to give you a comprehensive quotation. A full specification with a price breakdown is then sent out for your consideration and approval.A site visit is sometimes necessary to survey the terrain and discuss or determine the specification of your proposed structure. Our sales team operate nationally giving this support, providing customer service both before and after sales.We also offer a national construction service. Skilled and highly trained polytunnel teams will erect and clad your structure neatly and efficiently.