March 01, 2001
Crawlspace Condensation Q:I was called to a doublewide mobile home to investigate a problem with a 4- year-old duct system (the original duct system was no longer being used). Looking down the supply registers, I noticed moisture between the inner liner and the insulation. As I crawled into the crawlspace, I saw that the flex ducts were soaked. The condensation was “raining” off the duct. A previous contractor had even poked a hole in a duct to drain out the water. The duct system should be replaced, but that will not fix the problem. There are outside air vents into the crawlspace. How do I fix the problem, and not just the ducts? A:Whenever there is a moisture problem anywhere in the home, you have to ask, “Where did the moisture come from?” You seem to suspect that the crawlspace vents may be involved, and I bet they are. These vents are not removing moisture from the crawlspace. They are adding moisture. The outdoor air in Terre Haute has a dew point above 64°F for more than 1,000 ...
To read complete online articles, you need to sign up for an Online Subscription.
Once an order has been placed there is an automatic $10 processing fee that will be deducted with any cancellation.
The Home Energy Online articles are for personal use only and may not be printed for distribution. For permission to reprint, please send an e-mail to firstname.lastname@example.org.