Have a 1700 sq ft pier and beam house in east-central Texas. There is about 3 feet of air space between the soil and joists. Have 6-mil plastic over the dirt/sand in the crawl space. Foundation has seven 6x12" screened vents on 3 of the 4 foundation walls. The house is along a shoreline with the bottom of the crawl space about 4 feet above water level.
Durring the high heat and humidity of the summer months, I have had condensation on the top of the plastic. So far this year the top of the plastic has been dry. There is moisture on the bottom of the plastic.
The previous owner added a ventfan to the crawlspace entry cover to increase airflow.
As part of the current remodeling, I've considered removing the ventfan from the entry cover, running a 8" duct from the crawlspace to the roof (sealed through house)and putting a turbine vent on top of the duct. Since we almost always have a breeze, this would provide good air draw and eliminate an unsightly ventfan.
My question is: Do I really want to draw more air through the crawl space?
During the summer months, if I draw warm humid air into my cooler crawl space...won't I get condensation...and perhaps make the situation worse? ?
A second question:
The previous owner put r30 fiberglass insulation between the joists in the crawl space with the paper facing down. I've read that this may be backward...any comments?
Thanks in advance for any thoughts!
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