An eco-friendly alternative to using concrete or paving flags for a shed base Tough 100% recycled plastic grids with Integral T-shaped self-fastening connectors Cut-to-size weed-resistant membrane included Rainwater drains through the cavities to the earth keeping the floor bearers dry and ventilated Supports 240 tonnes/m2. No gravel is needed. Optionally, the perimeter can be filled with decorative aggregate to produce a French drain to help reduce rain splashing back onto the building Lightweight, easy to carry, and easy to maneuver into position Suits all makes and styles of garden building Rotproof and chemically inert - no maintenance needed