- High adhesion to mineral substrates and wool
- Vapour permeable
- Amount required:
- Fixing boards:approx. 5.0 kg/m2
- Reinforced layer: approx. 5.0 kg/m2
CT 190 mortar is designed to warm up external walls of the buildings by application of external thermal insulation composite system using mineral wool facade boards. It is an element within Ceresit Wool Classic insulation system. CT 190 is used for fixing of mineral wool facade boards and for applying the reinforcing protection layer to insulate the newly constructed objects as well as older buildings to be thermo-renovated.
1. Fixing mineral wool boards CT 190 mortar shows good adhesion to carrying, compact, dry and clean substrates free from substances decreasing adhesion (such as grease, bitumen, dust) of surfaces of walls, plasters and concretes. The adhesion to the existing plasters and paint coatings should be checked before starting the application. “Hollow” plasters should be removed. Any losses and uneven surfaces should be filled with the filler CT 29 or covered with cement plaster. Any surface contaminant and other adhesion impairing substances, vapor-tight paint coatings and the coats with low adhesion to the substrate should be completely removed, e.g. washed with water jet. In case of mycological contamination with moss and algae, the surface should be cleaned with steel brushes and, then saturated with a fungicide solution of Ceresit CT 99. The old, not plastered walls, strong plasters and vapour permeable paint coats should be dusted, then washed with water jet and left until they go completely dry. 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.
2. Armoured layer application. The surface of the boards which are additionally fixed with mechanical anchors should be thoroughly cleaned by means of a brush with loose wool fibres.
CT 190 should be poured into the measured amount of cool clean water and stirred with the drill by means of a mixer until the homogenous mass is obtained without lumps.
1. Fixing mineral wool boards. The ready mortar should be applied with a trowel along the board edges forming a strip of 3÷4 cm wide and a few spots with the diameter of approx. 8 cm. Then immediately, the board should be pressed to the wall with a few slight blows of a long float. The properly applied mortar when pressed should cover minimum 40% of its surface. The boards should be fixed tightly one at the other in one surface with the preservation of ”brick like manner” of vertical connection. When CT 190 is set (after approx. 3 days), the boards should be ground with abrasive paper and additionally fixed with mechanical anchors with steel cores.
2. Armoured layer application. The ready mortar of 3÷4 cm-thick layer should be spread along the surface of the boards by means of a smooth long steel float. The glass fibre mesh should be applied on the fresh mortar (with 10-cm overlaps), and then the second 1-2cm-thick layer should be applied and smoothed evenly so that the glass fibre mesh should not be visible. Fresh stains should be cleaned with water while hardened elements should be mechanically removed only.