What must occur before the installation of wall or ceiling membranes regarding mechanical components?

Before the installation of wall or ceiling membranes, a rough-in inspection must take place. This inspection is crucial as it ensures that all the mechanical components, such as plumbing, electrical wiring, and HVAC systems, are properly installed and meet the necessary codes and standards. The rough-in inspection evaluates these components while they are still accessible, which allows for any necessary corrections to be made before walls or ceilings are sealed and finished.

This step is essential because once the membranes are installed, it becomes much more difficult to access and make adjustments to the behind-the-wall systems without causing damage to the newly installed surfaces. Therefore, the rough-in inspection serves as a critical checkpoint in the construction process, confirming that everything is in place and compliant before proceeding further with the finishing work.