Inspection doors are specialized access points installed in walls, ceilings, or floors to allow for easy inspection and maintenance of hidden systems, such as plumbing, electrical wiring, or HVAC components. They provide a convenient way to check for issues without needing to remove large sections of drywall or other materials. These doors come in various sizes and materials, including metal and plastic, to suit different applications. Building codes often require inspection doors in certain areas to ensure safety and compliance, making them an essential feature in both residential and commercial construction.