There are several areas in the construction market where molded foam is used.  One of the fastest growing segments is insulated concrete forms or “ICF’s”. ICFs are hollow sections of molded foam, usually made from EPS, that construction crews stack into the shape of the walls of a building. This procedure is a lot like assembling Lego-blocks (the children's toy). The center is then filled with concrete to create the structure.

A typical four-inch-thick foam block wall is four to six times stronger than a conventional "stick-built" house, making it resistant to fire, violent winds and even earthquakes. In some areas, owners of foam-block houses may qualify for lower home insurance premiums. The combination of high-mass concrete and permanent insulation will also reduce noise pollution, resulting in a quieter home.