Encapsulated Crawlspace Humidity and Temperature
I have a crawlspace/cellar that I encapsulated with closed cell foam and poly sheet – it also has an exhaust fan (only) moving around 70cfm outside.
The house is ancient, and despite grading work and a perimeter french drain, it stays wetter and more humid than I would prefer. At lease part of my problem is ground water as I sit in a low(ish) area.
I’ve been using a portable dehumidifier as a crutch (not sure how much more I can do otherwise), which is working well and maintaining ~40-45%rh. My problem is that I also use this area for food storage, and the dehumidifier is keeping the temperature between 80-85 degrees.
I can’t help but realize that without the dehumidifier, the temperature is perfect. But I repaired quite a bit of rot and I’m afraid of letting the rh creep up. I’m unsure how I can maintain both temp. and rh?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part