With the onset of the energy crisis around the globe, it is important to conserve valuable energy for future generations. It is essential to select more energy efficient materials for construction and rehabilitation of the buildings. The solution to this need has been the use of rigid insulation materials, which protects the building against heat, humidity, and sound. However, the use of a new insulation material made of polymer and fireproof components has revolutionized both energy and cost savings. This article provides examples of a few building insulation materials, which the designers in Afghanistan may consider based on their availability and cost effectiveness.