condensation on basement duct work

We have a ranch home with a full basement. Half of the basement is finished and enclosed and we are getting ready to finish the other half of the basement and add 2 bedrooms, laundry, 2 1/2 baths and a full bath. The problem we are encountering only occurs during the summer, but it is quite a problem. We have a tremendous amount of condensation on the duct work throughout the basement. Do you think that this is due to part of the basement not being finished(insulated in the finished part and not in the other) that is causing all of the duct work to sweat? If so, what are the chances that it will stop when we insulate the outside walls and finish the rest of the basement? If not, do you think we will need to consider redoing the duct work with insulated duct work or would a dehumidifier suffice? The total basement measures 26 x 47, is completely underground except for one wall. I'm not sure what else I can tell you to help with answering this, but any help would be appreciated. Thanks

 

hurleyherd,

I copied your post over to the Repair Forum under Heating and Cooling. I felt that more expert advice is available there.

Assumptions could be a couple of things at least but I feel you'll get some good help there unless others have some comments.

Good Luck!