How do I install the StaenisGrid filled with drainage mortar?

1. Fill the StaenisGrid with drainage mortar and place it just slightly higher than the top surface of the grid. Try to lightly press the drainage mortar with your trowel or long screed bar.
2. Take a long screed bar or aluminum straightedge and drag all the excess drainage mortar off the grate. This way, it is now level with the top surface of the grate.
3. Sprinkle screed by hand onto the surface and rub it in with a large float. This will ensure that all irregularities are filled in. Be sure to check that you do not create any dips or bumps in the compartment and always keep it level.
4. For extra adhesion and flatness, take the screed iron again and polish the screed by holding the screed iron slightly at an angle and rubbing it over the surface.
5. Check and correct each cell for flatness to avoid hollows in the grid. This is a very important step that must be carefully observed.

* Only manually press/finish the drainage mortar and screed with a screed trowel and compact with a large float. Do not press it with your feet, as this can cause height differences.