Keene Building Products TriDent™ Dimple Drain 025 - 4' × 50' Roll

HIGH-PERFORMANCE DRAINAGE MAT

Inspired by the legendary Trident of Poseidon, the TriDent™ Dimple Drain 025 is engineered to command water exactly where it needs to go—away from your structure. Just as the Greek god of the sea used his weapon to shape the flow of the ocean, TriDent™ harnesses advanced materials and design to channel water through dedicated pathways, protecting building assemblies from hydrostatic pressure.

This two-layer drainage system combines strength, efficiency, and versatility. The first layer is a high-strength, moisture-impermeable, cuspated (dimpled) polystyrene sheet that delivers exceptional compressive strength. Bonded to this is a nonwoven polypropylene filter fabric, which keeps silt, soil, and concrete fines from entering the drainage path, ensuring long-term performance and reliability.

FEATURES AND BENEFITS

• Dual Functionality: Provides both drainage and ventilation in one product.

• Air Gap Creation: Maintains a separation between the membrane and foundation wall.

• Lightweight & Easy to Install: Reduces labor and handling effort on-site.

• High-Performance Filter Fabric: Prevents clogging while maintaining high water flow.

• Superior Durability: Resists crushing, deformation, and long-term degradation.

APPLICATIONS

• Below-grade foundations

• Balconies

• Commercial planters

• Under-slab drainage

• Green roofs

• Plaza decks

ROLL SIZE

• Thickness: 0.25" (6.35 mm)

• Nominal Size: 4' × 50'

• Coverage: 200 sq. ft. per roll

RESOURCES

• Technical Data Sheet
• Submittal
• Product Overview
• TriDent™ Dimple Drain Safety Data Sheet
• Keene Building Products Safety Data Sheet
• Installation Instructions
• Keene Green Brochure
• Manufactured Drainage Products Overview