Substrate preparation
The substrate must be rough, open-pored and have a good keying structure. Completely chip off existing coatings and old, damaged plaster down to a sound substrate surface for a minimum of 80 cm beyond the visible damp and salt area. To ensure good adhesion, prepare a spatter plaster with the addition of CC 81. Apply the sprayed mortar in a net-like pattern to only 50 % cover. In the case of mixed brickwork, porous bricks and sand-lime bricks apply a pneumatic mortar layer of max. 5 mm thickness.