The answer to 'post-construction cleaning smells bad' is that there are several common causes, including lingering construction odors, mold or mildew growth, and improper ventilation. These smells can be unpleasant and even unhealthy, so it's important to address the issue promptly.
Some of the most common causes of post-construction cleaning odors include leftover construction materials, such as paint, solvents, or adhesives, as well as damp or wet areas that can lead to mold and mildew growth. Inadequate ventilation can also contribute to stale, musty smells. In some cases, the odor may be caused by a buildup of dust, debris, or other contaminants that were not properly cleaned up after the construction project.