Building with inflated forms offers the contractor varied opportunities. Arches, domes, and other shells offer some of the most beautiful and most efficient shapes for concrete structures. And yet such shapes in concrete have been underused in the past because of the cost and complexity of forming. However, with the efficiency of inflated forms, these attractive shapes become economical to build. Inflated forming gives the builder a chance to work more competitively and to expand his volume of work by passing some of the savings on to the owner.