Installing Central Vacuums in New Homes Before Pouring Concrete. Installing central vacuums before pouring concrete is a smart choice. This method allows for seamless integration of the vacuum ductwork into the home’s foundation and walls, ensuring a clean and dust-free environment for construction workers and easy access for future maintenance. By incorporating the system during the early construction stages, homeowners can enjoy the benefits of a central vacuum system—such as improved indoor air quality, reduced noise pollution, and increased property value—without the hassle and disruption of a later installation.