Blue Dow Corning Foam 1" x 4' x 8' Tongue & Groove Styrofoam – R-5 Insulation Board

Upgrade your insulation with the Blue Dow Corning Foam Tongue & Groove Styrofoam board, designed to deliver excellent thermal resistance and superior durability. Measuring 1 inch thick by 4 feet by 8 feet, this rigid foam board provides an R-value of 5, making it an efficient choice for reducing heat transfer in walls, roofs, and floors.

Featuring a convenient tongue and groove edge, the boards interlock tightly to minimize gaps, improve energy efficiency, and simplify installation. The closed-cell structure of the foam resists moisture, mold, and mildew, ensuring long-lasting performance in both residential and commercial applications.

Ideal for insulating under concrete slabs, crawl spaces, basements, and exterior sheathing, this Blue Dow Corning Styrofoam is lightweight, easy to handle, and compatible with a variety of construction materials. Enhance your building’s energy efficiency with this reliable and cost-effective insulation solution.