The current use of any building material is predicated on cost, functionality, durability, aesthetics, or a combination of these. The traditional first cost methodology of owners, designers and public officials around the world has contributed to a non-sustainable system. Decisions based on first cost most often ignore life-long maintenance, rehabilitation and operating cost. Life cycle costing is the only way to properly evaluate the sustainability of a project.

The initial cost of Buildex® lightweight aggregate per cubic yard is usually higher than a comparable unit of normal weight aggregate. But when analyzed from a holistic or product -use perspective, the energy savings it provides almost always offset the initial cost and typically produce significant net savings. These savings come from weight reduction that results in a reduction of overall materials being used, and in construction and performance efficiencies.

The up-front cost of components manufactured with Buildex® lightweight aggregate is more than offset by the cost savings in the following areas: labor, lower dead loads, better fire resistance resulting in reduced concrete thickness, and less reinforcing required in building frames, girders, piers, and footings. For example, when compared to lightweight and normal weight concrete on a bridge with an 8-inch thick deck, where the LWC has a $20 per CY premium, the finished deck cost is generally less than 1% higher.