Tired of the institutional look of your basement? If it's plagued by prison-like walls of concrete block, simply concealing them can make a major visual impact. The preferred technique, known as parging, couldn't be much simpler. All you need to do is trowel on a thin layer of mortar, such as Rapid Set Mortar Mix, creating either a smooth or textured decorative finish. So, don't lose your summertime DIY momentum—finish strong!