TriDent Dimple Drainage Board 4' x 50' (Model DD 050)

TriDent® DD is engineered to manage water with precision, relieving hydrostatic pressure and protecting below-grade structures. Its two-layer design combines a moisture-impermeable, dimpled polystyrene sheet for superior compressive strength with a polypropylene filter fabric that ensures high water flow while blocking silt and debris. Lightweight yet durable, it installs easily while maintaining long-term performance. By creating an air gap between the foundation wall and waterproofing membrane, TriDent® DD reduces water contact, prevents leaks, and safeguards structural integrity. Ideal for foundations, under-slab drainage, balconies, planters, plaza decks, and green roofs.

Key Features

• Drainage of Excess Moisture & Ventilation in One Product
• Creates an Air Gap Between the Membrane and Foundation Wall
• Light-Weight & Easy to Handle
• High Performance Filter Fabric
• High Strength & Durability