During the inspection of the substrate, the sources of damp must be found and removed. If necessary, replace the flashings, troughs, roof cover, and perform new insulation of foundations, soil draining, etc. If the substrate is significantly damp, hammer off its topmost layer going at least 80 cm outside the damp area limits, clean with steel brush and leave to dry. When dry, vacuum the surface. Remove the damp from construction partitions and rooms using air driers and heaters or improving the ventilation system. Employ experts in the field for this type of work. Protect the cleaned spots against precipitation and excessive drying of the liquid that might take place in places exposed to sunlight.

Tarnish removal
Perform preliminary cleaning of the infected surface from the tarnish before the application of the fungicide. The cleaning technology (manually or mechanically – with pressure washer) must be selected on a case to case basis individually. The selection is determined by the situation of the surface and the degree of its infection. In case of very strong tarnish, mechanical removal is necessary. If the mould is light, the tarnish can be removed with water and brush and de-dusted with a vacuum cleaner. Technical details, like the jet type and pressure in case of mechanical cleaning, or the hair hardness for manual removal, must be decided upon according to the intensity of the contamination and the substrate strength. During cleaning, be prepared for loose parts of the substrate to fall off. If, for example, the plaster is weak, and its replacement is not planned, or when the cleaned surface is relatively small, e.g. in case of grouts, the tarnish can be removed manually with brushes of appropriately hard hair. The pressure washer with flat water stream jet must be used when the tarnish is removed from the facade and the plasters are strongly bound with the substrate, and there is no risk of damaging them. The maximum pressure must not exceed 150 bar. When the facade is extremely greasy, which impedes the penetration of the fungicide, use detergent to wash. In case of strong tarnish, enhance the effect of the preliminary washing using hot water.

Surface decontamination with ATLAS MYKOS can be carried out when the substrate temperature and the ambient temperature is within +5 °C and +25 °C. Apply the liquid evenly with a brush, a roller, or by spraying. Due to the possibility of occurrence of mycelium in various stages of development (easy to remove vegetative mycelium and sprouting spores, and much more resistant endospores like conidium), it is recommended to apply the solution three times. Intervals of 12-24 hours must be observed between consecutive applications.

Surface protection
If the topmost layer of the substrate was hammered off, it must be recreated with appropriate mortars, e.g. ATLAS PLASTERING MIX or ATLAS TEN-10 fast setting mortar (according to the technology of their application). Painting of the surfaces treated with ATLAS MYKOS can take place not earlier than 48 hours after the application of the agent. When applied indoors, the rooms can be used after 48 hours from the application of the liquid. Silicone paints and preparations, e.g. ATLAS SILSTOP, ATLAS ARKOL N, or ATLAS FASTEL are the most suitable for painting. They will significantly limit the absorptivity of the substrate and reduce the risk of new contamination.

The information comprises basic instructions of product application and do not relieve users of responsibility for work in accordance with good construction practice and safety and health (OHS) regulations.