Mould can always be problematic If the conditions are just right. Nearby occupants can suddenly start feeling symptoms and not sure why; it is often called the silent killer.
A school with a new building has no air conditioning unit yet. It will be hard to have the right air quality in their classrooms during the summer's first school day.
Ensuring the right type of drying gear is used for water and flood damage can mean the difference between paying $500 and $5000 dollars (or more!). In some cases, using the wrong gear can even cause secondary damage.
As restoration professionals, it can be hard to know what you can charge for. Especially when there are those who will charge nothing for “Cowboy” restoration.