Why do dome structures save on building materials?
The primary factor affecting efficient use of materials and energy in a structure is its shape. A sphere represents the smallest amount of material surface area needed to enclose a given volume of space. A divided sphere becomes one of the most efficient shapes known to enclose a given floor area. Domes are also so light that they dont need foundations. Stressed skin domes have no joists or any timber supporting the roof and walls giving yet more savings in material costs.
