1

Form dwarf walls or piers to support GRC floor panels

2

Place GRC filter panels into position

3

Level with laser to within 3mm using stainless steel shims. Seal panel joints with mastic or grout.

4

Tie reinforcing steels onto starter bars to form a total structure with the base floor

5

Remove small bush protection caps and screw in polypropylene filter sleeves

6

Snap in disposable sealing caps to protect filter sleeve threads against the ingress of concrete

7

Pour and vibrate concrete until level with plastic caps

8

Remove protective plastic caps and screw in filter nozzles. Level to 2mm using plastic or stainless steel shims

9

Carry out air distribution test