3/4" 4x8 DOW GREY RIGID FOAM BRD
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3/4" x 4' x 8' Dow Styrofoam™ Gray Board Rigid Foam Insulation
High-Performance Moisture Resistance for Walls & Foundations
Upgrade your project's energy efficiency with the Dow Styrofoam™ Brand Gray Board. This 3/4-inch rigid foam insulation is a closed-cell Extruded Polystyrene (XPS) board specifically engineered for high-moisture environments. Whether you are insulating a basement, a crawlspace, or exterior sheathing, Gray Board provides a continuous thermal barrier that resists water absorption and maintains its R-value over time.
Key Features
Superior Moisture Resistance: The closed-cell structure prevents water wicking, making it ideal for below-grade applications or damp environments.
Enhanced Thermal Performance: Provides a steady R-value of 3.8 (at 3/4" thickness) to reduce energy loss and eliminate thermal bridging.
Durable & Lightweight: Easy to handle, cut, and install, yet tough enough to withstand the rigors of a job site.
Versatile Application: Perfect for use in residential and commercial wall sheathing, foundations, and slab-on-grade applications.
Sustainable Choice: Formulated with zero ozone-depletion potential.
Technical Specifications
| Attribute | Specification |
|---|---|
| Thickness | 3/4 inch |
| Dimensions | 4 feet x 8 feet |
| Material | Extruded Polystyrene (XPS) |
| R-Value | 3.8 |
| Edge Profile | Square Edge |
| Compressive Strength | 15–25 psi |
Common Applications
Exterior insulation over wood or metal stud framing.
Interior basement wall insulation (must be covered with a thermal barrier like drywall).
Under-slab insulation for radiant heat systems.
Crawlspace walls.
Pro Tip: Use compatible foam-safe adhesives and seam tape to ensure a completely airtight seal and maximize your energy savings.