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Shallow Storage System Permavoid

Permavoid high modular interlocking void former designed for use as a combined drainage component and subbase replacement system. The system is characterized by an exceptionally high compressive strength and bending resistance. The units connected create a rigid horizontal structural ‘raft’, ideal for multifunctional subbase applications.

The system has evolved to a subbase replacement system with aeration, water conveyance, storage, infiltration, and irrigation functionality. It effectively combines its high compression strength with the very high void ratio (95%), providing reliable and efficient water conveyance and storage in subbase constructions in SUDS, road-, sports- and rooftop applications.

Using the capillary fiber technology the system is not only suitable for water attenuation and conveyance, but also functions as a sub-soil capillary irrigation system, creating a constant soil moisture content for plants, turf grass or equestrian surfaces.

Key features and benefits:

• Creates a shallow Sustainable Urban Drainage Systems (SUDS)

• Replaces gravel subbase, creating a lightweight subbase with 95% open space.

• Suited for stormwater catchment, conveyance, attenuation and irrigation of soil above the system.

• Suitable for water management (catch-store-reuse) in gardens, public green space, blue-green roofs, podium decks, sports, play and equestrian arenas.

Blue/green roof Orly square Amsterdam

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