Insulation is one of the most important materials used in construction. It helps to keep homes and businesses warm in the winter and cool in the summer, and it also helps to reduce energy costs. Foam board insulation is one of the most popular types of insulation, and it is perfect for use in a wide variety of applications. At Insulation4US, we offer a wide selection of foam board insulation, including 3 inch boards. Our foam board insulation is made from durable materials that will withstand the rigors of daily use, and it is available in a variety of thicknesses to suit your needs.