Basement Waterproofing: Basement Finishing Systems by Nodrywall The Owens Corning Basement Finishing System™ looks terrific. In fact, we had some friends over last weekend and they were very impressed with the quality of the work and the product. They were shocked that the installation only took 10 business days. They had finished their basement in drywall and it took their contractor seven months. Francis and Linda, Eldersburg, Maryland by Info