What are some uses of Styrofoam?

Styrofoam has a variety of uses. Styrofoam is composed of 98% air, making it lightweight and buoyant.[6]

DuPont produces Styrofoam building materials, including varieties of building insulation sheathing and pipe insulation. The claimed R-value of Styrofoam insulation is five per inch.[7]

Styrofoam can be used under roads and other structures to prevent soil disturbances due to freezing and thawing.[8][9]

DuPont also produces Styrofoam blocks and other shapes for use by florists and in craft products.[10] DuPont insulation Styrofoam has a distinctive blue color; Styrofoam for craft applications is available in white and green.[1]

Styrofoam is used in building insulation, as a soil stabilization material,  and as crafting material.