Baur Folien’s double membrane gas holders are proven solutions for flexible and secure biogas storage. The system consists of two membranes: an outer weather protection membrane for shape stability and a gas membrane to regulate gas volume. We offer versions for tank-mounted or freestanding ground installations – round or rectangular – tailored to customer needs. Durable materials, low maintenance, and long service life ensure reliable operation. Design, production, and installation come from a single source. We also supply replacement membranes for systems from other manufacturers.