All DUOL air supported structures are built from  best available materials, with high-tech technology and real craftsmanship to ensure a long durable life cycle of DUOL products. With proper maintenance air supported structure are capable to last for more than 40 years.

The quality policy has first priority at DUOL. It matches the responsibility for the customers' expectations as well as the self-image of our employees. It is therefore a guideline for obliging assignments to ensure the quality of our company.

The QM-system of DUOL is geared to the standards of ISO 9001:2008 and is regularly checked in line with that certification.