By Outsulating a building with foam on the walls, utilities can be dramatically reduced. It can actually be very affordable, especially if you have already planned to re-stucco or re-roof the building anyway. The extra cost of adding foam during the re-stucco is modest, and in addition to the energy savings, the stucco will last much longer, since Styrofoam doesn’t expand and contract like other materials. It will make an old building look like new. Wall Outsulation is a great return on investment.