Water Damage in Santa Cruz: Do Not Open The Windows

Coastal air is already carrying the moisture you are trying to remove.

Drying works by moving water out of materials into the air and then pulling it out of that air. When the outdoor air is already close to saturated, which it frequently is within a few miles of the coast here, opening the windows brings in air that has no capacity left to take anything. At best it does nothing. At night and in the fog it actively adds moisture, and it is a common reason a job that should have finished in four days is still running on day seven.

So on this side of the hill the enclosure gets closed rather than opened, and dehumidification does the work. It feels counterintuitive in a house that smells damp and it is the single most useful thing to know about drying in a coastal climate.

The rest of the local picture follows from the same humidity. Older cottages over ventilated crawl spaces, hillside homes where the crawl space stays damp most of the year, and interior surfaces that stay cool enough to condense. It all shortens the runway to mold considerably, which is why we assess for it on every water loss here rather than treating it as a separate question discovered later.