VF HD 150 Void Former

The high density 150mm deep void former works in tandem with a restrictor chamber, which controls the final discharge rate into the building’s drainage outlets.

• Controlled Storage: During heavy rain, it temporarily holds excess water that cannot immediately be discharged due to site-specific flow restrictions
• Source Control: By managing water at the roof level, it helps meet Sustainable Drainage Systems (SuDS) requirements and often eliminates the need for expensive underground storage tanks
• Structural Support: It provides a stable base for various surface finishes, including green roofs, paving, and even vehicle-access areas
• Material Design: Typically high-density geocomposite structures with high compressive strength.
• Void Capacity: Offers over 90% void space for maximum water storage efficiency.