Why does drying matter so much in a humid climate?
Washington summers are warm and damp. When outdoor air is already full of moisture, wet materials dry slowly on their own, and some do not dry at all. Opening windows can even make a damp basement worse on a muggy day.
That is why professional drying relies on a closed, controlled space. Dehumidifiers pull moisture out of the air, and air movers push dry air across wet surfaces so more moisture can evaporate. The equipment works as a system. Too many fans without enough dehumidification just moves damp air around.
Older rowhouses add their own challenges. Plaster walls, layered floors and brick party walls hold moisture for a long time, so we measure at several points instead of trusting what the surface feels like.

