As soon as there are suspicions of hidden moisture damage and mould contamination, a specialist should be consulted. If mould infestation is detected, it is imperative that the cause is first clarified before professional remediation measures can be started.
Determine the size of the infestation
During the initial inspection, the size of the infestation should first be determined. Infestation size A is defined as damage with a surface area of < 0.5 m². If the extent of damage exceeds this value and there is a large, extensive spread, this is called infestation size B. In this case, deeper layers may also be affected. In this case, deeper layers can also be affected.
Health protection has priority
Mould abatement measures usually release an increased concentration of spores. Therefore, carrying personal protective equipment (PPE) is mandatory to protect the processor from contact with mould. This also applies if initially only an assessment of the infestation size is made. Further details can be found in the Weber handling guideline for mould control.
If a case of infestation of < 0.5 m² cannot be controlled immediately, temporary measures are necessary; infestation areas on mineral substrates including joints and closed-pored substrates such as tiles or wood should be covered with foil and the infested inventory covered. In case of infestation size > 0,5 m², it is mandatory to seal off the infested areas by setting up a black/white area.
Correct assessment of spore loads
Depending on the duration of the work and the expected level of spore contamination, a distinction is made between the three hazard classes. As a general rule, there is no particular risk if the spore load is low. The higher the expected spore load and the duration of the activity, the higher the hazard class.