1. Lay the drainage cell over the surface of the membrane and butt together (interlocking is not required for horizontal installation). If necessary a 3mm Protection Board should be placed under the drainage cell to further protect the membrane. Cut holes where required through the protection board for the pipe outlets.

2. Cut the drainage cell where required using a hand or circular saw.

3. The filter fabric is supplied separately in rolls. Roll out the filter fabric over the drainage cell allowing for a 150mm overlap at each seem. Also allow for additional fabric to cushion the edges to protect the waterproof membrane.

4. Install drainage cell to the walls of the planter box if required and cover with filter fabric.

5. Lay a 50-100mm layer of washed coarse river sand to create a filtration layer and
prevent clogging of the fabric (small machinery recommended).

6. Lay the soil profile with a minimum of 400mm depth before trafficking with heavy machinery or vehicles over the surface.