How does a house fall apart when nobody lives in it?

A house can deteriorate when unoccupied due to a lack of maintenance, leading to issues like water damage, pest infestations, and structural problems. Without regular upkeep, elements like roof leaks or Plumbing failures can worsen, causing mold growth and wood rot. Additionally, environmental factors such as extreme weather, temperature fluctuations, and exposure to the elements can accelerate decay. Over time, these factors can cause significant structural collapse or degradation.