Vented Crawlspace Humidity
Where can I go for good, local, information on crawl space humidity issues?
Attached is a recording from a crawlspace in zip code 94705. It’s a vented mostly dirt crawlspace with 6 mil plastic covering everything, without taped seams or edges. The humidity is well above what most Internet sources say is ideal for a basement, but well below the average humidity of the outside air. The area has frequent foggy mornings and evenings, but mild temperatures all year.
A contractor has recommended a timer based crawlspace ventilation system, but this seems like it might increase rather than decrease humidity – especially on a foggy day when literally it can feel like it is misty out. Thoughts?
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