What is the main purpose of sealing penetration points in a building?

Sealing penetration points in a building serves the critical purpose of preventing gas migration from outside into the building. These penetration points can include areas where gas pipes pass through walls, floors, or ceilings, creating potential pathways for gases, including harmful ones like carbon monoxide or methane, to enter the living space. By effectively sealing these points, the integrity of the building's envelope is maintained, which is essential for ensuring occupant safety. It mitigates the risk of dangerous gas accumulation, thereby protecting health and preventing potential hazards associated with gas leaks.

The other options, while they touch upon relevant aspects of building maintenance and energy efficiency, do not directly address the critical safety concerns associated with gas piping. Aesthetics and noise control, although important, are secondary to the fundamental need for safety in preventing gas migration. Enhancing energy efficiency can also be a benefit, but it is not the primary goal of sealing penetration points, which is centered on safety and hazard prevention.