- High adhesion to mineral substrates and wool
- Vapour permeable
- Resistant to weather conditions
- Amount required: approx. 5.0 kg/m2
CT 180 mortar is designed to warm up external walls of the buildings by application of external thermal insulation composite system using mineral wool facade boards. CT 180 mortar is used for fixing of mineral wool facade boards to insulate the newly erected objects as well as the buildings to be thermo-renovated.
CT 180 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, steam-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.
CT 180 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. 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. In case of even, smooth substrates, before the mortar is applied by means of a toothed long float (teeth 10–12 mm), it is necessary to apply so called “priming” with CT 180 forming a layer of 1 mm thick. 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 180 is set (after approx. 3 days), the boards should be ground with abrasive paper and additionally fixed with mechanical anchors with steel cores Ceresit CT 335.