If you’re interested in insulating with styrofoam, note that styrofoam insulation is a type of extruded insulation Styrofoam™ is a registered trademark of the dupont chemical company (“dupont”) or an affiliated company of dupont Polyisocyanurate is another option, coming in as the densest and most expensive option for foam board.
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It’s more than just foam cups
Learn about eps, xps, and #4 styrofoam, their differences, and whether they can be recycled.