DuPont™ Styrofoam™ Insulation (formerly known as Blue Board) is a rigid, closed-cell extruded polystyrene foam (XPS) board designed to deliver long-lasting thermal performance and moisture resistance. Trusted since 1941, this nonstructural insulation improves wall system energy efficiency by providing a continuous barrier that can increase effective R-values by up to 20%. Its high compressive strength and low water absorption make it ideal for both interior and exterior applications, helping protect underlying materials from damage.
For a high-performance air and moisture barrier system, pair Styrofoam™ boards with DuPont™ Styrofoam Brand Tape (Formerly known as Weathermate™ Construction Tape) to seal seams and Great Stuff™ Sealants to fill gaps and joints. These accessories work together to minimize air infiltration and maximize energy savings.
When attaching insulation to masonry surfaces, Plasti-Grip® PMF Plastic Masonry Fasteners offer a secure, thermally efficient solution. Available in a range of sizes, they’re easy to install and provide exceptional holding strength in concrete, block, and brick, making them perfect for residential and commercial applications alike.
Construction Tape: DuPont™ Styrofoam Brand Tape is recommended to seal the joints and seams of house wraps and STYROFOAM™ insulated sheathings.
