When dealing with Black Mold, it must be removed by a professional. The levels of toxicity are too harmful for you to clean yourself. I highly suggest that we come in and take a look at the situation. We can inspect the property, find out the source of the black mold, and provide you with scope of work of proper and safe removal. Once we identify the source, we can determine if there are any considerations for Toronto climate or if it related to something else. Please feel free to give me a call at 1-888-551-0514 and we can arrange for a free inspection and assessment.