The invention provides systems and methods for forming low density ceramic felt material cores which are sandwiched between ceramic matrix composites to form a ceramic matrix laminate possessing a high strength-to-density ratio while maintaining a stiffness required for mechanical applications. The sides and the bottom are coated with an electrically insulating material that delimits an empty cavity, and forms a plug to close the cavity. The floor selector interface may include one or more floor selectors, each of which correspond to a floor in a multi-story building. By doing so, employees will be more confident in their approach to patient care, specifically giving \u201cshowers\u201d.