In terms of constructability, structural capability, quality assurance, construction cost and overall design potential, the thin-shell concrete structures offered by Performance Building Systems, Inc. are truly outstanding.  If I were presently planning to construct an earth sheltered dome or barrel arch out of thin-shell concrete, my purchase order would most certainly be placed with Performance Building Systems, LLC  I am very impressed with their system and product.

Richard Behr, Ph.D.P.E., Texas Tech University Engineering faculty member