We had a leaky roof and mould on the ceilings. We're grateful to Scott for the time he spent talking us through it, and we're glad we took his advice to fog the whole house and use the dehumidifier. It made a huge difference to the air quality, and the visibility of mould in the ceiling. It saved us a lot of stress and work and we feel confident that it was worth doing as he'd advised. No regrets at all and it's so nice to have the problem gone.