Preparation of the substrate
CT 83 has very good adhesion to sound and carrying substrates, such as wall, plaster and cement substrates free from grease, bitumen, dust and other substances decreasing adhesion. The adhesion to the existing plasters and paint coatings should be checked before starting the application. ”Hollow” plasters should be removed. Substrates with high water absorption, e.g. walls made of aerated concrete blocks or silicate blocks should be primed with Ceresit CT 17 and left for drying for at least 4 hours. Before fixing EPS-boards the adhesion of the mortar should be checked by fix polystyrene boards (10x10 cm) to the prepared substrate and tear them of after 2-3 days.CT 100 compound is ready to use. Before starting work, it should be mixed until homogeneous consistency is achieved. If necessary, 1% of water can be added to achieve the necessary consistency. Mixed mortar should be spread evenly on the surface of the boards with the use of a notched trowel, with 6-8 mm notches. The fibre glass mesh is immediately spread on the prepared layer and embedded with the use of a metal spreader and smoothed down. While doing this, a reserve of about 10 cm of the adjacent strips of mesh should be maintained.