National Polytunnels Limited was incorporated in 1988 manufacturing and installing horticultural growing houses.  In 2006 we expanded the company and using our expertise gained, developed and added canopies to our range. National Structures was formed thus allowing us to create bespoke structures for schools, garden centers and retail outlets across the U.K. and Ireland incorporating a wide selection of materials into our range including steel, Glulam timber and aluminum, all of which can be fitted with a wide range of roofing options including polycarbonate and tensile fabric.

At our factory premises in County Durham, we fabricate all steel and aluminum including the shaping, cutting and welding of PVC cladding materials.  Delivery to the customer is by our own transport and construction is undertaken by our in-house installers who are fully health and safety trained.

Planning Permission

We recommend you contact your local planning authority to ascertain whether or not planning permission is required. If so we will gladly provide you with all the relevant planning drawings and assistance you require.

Structural Calculations

A set of structural calculations can be provided.