Stylite EPS 70 Polystyrene Insulation Board SDN is an expanded polystyrene board. It can be used on a variety of floor applications, domestic and industrial to satisfy the current building regulations and U-value requirements. The most common applications are below a concrete slab, a screen or a chipboard floor finish. The insulation boards are extremely easy to install and are available in range of grades and sizes to suit your individual requirements such as the following thicknesses: 25mm 50mm 75mm 100mm Contact us today to find out more.