Roofing - Fabric :

In this type of structures, the covering membrane is usually made of some kind of fabric or textile materials. Tensile fabric structures are an environmentally sensitive medium. Tension is the most efficient way of using any material, it utilizes the material at maximum efficiency rather than just the material at the extremes of the cross sectional form, as in bending and compression loads Fabric structures have higher strength/weight ratio than concrete or steel.