Waterproofing work should not be carried out when climatic conditions could be harmful or there is an imminent risk of its occurrence, particularly when it is snowing or snow on the roof, when it rains or the roof is wet or when there is strong wind. Work must be performed when the ambient temperature is below 5 ° C or above 35 ° C ( below 41 ° F or above 95 ° F ). Any damage that causes leaks should be repaired immediately by specialized personnel, with footwear and appropriate safety measures.