You may have noticed that the edges of your carpets, especially near baseboards and under doorways, are developing dark grey lines or stains. Despite your best efforts to keep your home clean—perhaps even enforcing a no-shoe policy indoors—these stubborn black marks persist, leaving you puzzled and concerned.
Such discoloration can be alarming, not only due to the unsightly appearance but also because it raises questions about what might be lurking beneath or behind your walls. This article aims to shed light on the common causes of these dark carpet edges, distinguishing between harmless dirt and potentially harmful mold, while also offering solutions for both cleaning and prevention.
1. What Those Dark Grey Carpet Lines Really Are
The dark lines forming along the edges of your carpet are often known as ‘filtration soiling.’ This phenomenon occurs when air passes through the carpet, leaving behind dust, dirt, and other particulates that get
