I live in northeastern Ohio and my house was built in 1945 (basement is cinder-block). We have cold winters and a lot of snow. My basement is finished and dry walled. The basement has been water proofed in the past and moisture no longer enters the house. However, the basement is freezing! Does anybody know if I can insulate behind the drywall without putting in a moister barrier? As I don't want to rip all the drywall down and create a mess, I wanted to know if I could drill holes and spray in cellulose insulation (similar to what I've done for our attic). Any other suggestions are encouraged. Thanks.

Adding insulation sound like the right way to go and I am sure it would help. However, there are other things to consider that may be the real problem. When you home was built in 1945 the basement was not considered when the furnace was sized for the living area. You should get 3 contractors to bid a new furnace (not really buying just bidding) and see if they increase your BTus. They may also tell you there is not enough supply or return in the basement. Many basements I have worked on had no return at all and you could hang meat down there in the winter. On you original question about drilling holes and filling with cellulose is not acceptable. You need that barrier, it should be there insulation or not so whoever finished the room kind of messed up