Some homes already have a patio area that is covered with a conventional-style roof. Malibu Sunrooms has the capability of building a wall system under that roof. At times, there may already be a deck or concrete pad that we can utilize for your foundation. Chances are, we will need to do some additional work to make this foundation structural for a sunroom. However, in most cases, it can be done. We call these types of builds “Fill-in” or “Build-Unders.”