Our office is in a 160-year old house in Grimsby, Ontario. The staff were complaining about a musty, mouldy smell. We hired Mouldoff to inspect the property - they found mould in the basement and they showed us the mould. Over the next weekend they remediated the problem, and even after 2 years the mould has not returned. We didn't have to close the office even for a day! I recommend Mouldoff to anyone who has a mould problem, no matter how big or small.