Quad-Lock Building Systems Ltd. claimed its share of the credit when two single-family residences in Yellowstone National Park earned LEED certification. The houses were constructed with Quad-Lock insulating concrete forms. The contractor, Zanterra Parks & Resorts, chose Quad-Lock because it was aiming for LEED certification, and Quad-Lock forms provide the highest Rvalue in the industry. The homes will serve as a model for green, energy-efficient construction developments in national parks. To learn more about Quad-Lock, visit www.quadlock.com or call (888) 711-5625.