The Airform is the key component in Monolithic Dome construction. Manufactured from architectural fabrics made of a polyester or nylon base and coated with PVC, an Airform membrane is inflated to create the shape of the final structure. Once inflated, layers of foam, steel rebar, and shotcrete are applied to the interior surface to create the finished building. The Airform is left on as a waterproof roofing membrane and as a base for exterior coatings.