Currently, the exterior walls have batt insulation. It has the paper face on one side. A few months ago, I removed a window due to watered down drywall caused by the window. At the time, I didn't check to see if the insulation was the kind with a vapor barrier. (there is no plastic, that I know for sure) However, I dont know if the insulation installed was the kind with a vapor barrier.
Now, we have decided to do cellulose at some point. We are currently doing a remodel of 2 rooms so I need to decide if I should remove the drywall and the insulation and then get cellulose blown in. Or if I should leave the drywall and insulation as is and when we get new siding at some point, have cellulose blown in with the batt insulation.
Are there any advantages/disadvantages of leaving the batt insulation alone? Do I need to worry about there possibly not being a vapor barrier?