Premium Waterproof Backing Board – Ultimate Soundproof & Insulation Solution
High-density extruded polystyrene (XPS) foam core ensures superior moisture resistance, preventing water absorption and mold growth—ideal for humid environments. Precision-engineered with a smooth, high-end finish for seamless installation in walls, ceilings, and floors, enhancing both residential and commercial spaces. Exceptional thermal insulation (R-value 5.0 per inch) and noise reduction (STC 50+) perfect for studios, basements, and exterior cladding. Ultra-lightweight yet durable, withstands heavy loads without sagging—backed by industrial-grade waterproof coating for long-term performance. Bulk pricing available for contractors and wholesalers—global shipping, lowest price guaranteed.