Filtration soil is a term used to describe dark, grayish lines that may appear on carpet. Learn about cleaning deeply soiled carpet.
This is not a carpet defect, but a situation in which dust and other airborne pollutants can accumulate on the carpet face fibers in areas with a concentrated flow of air over the carpet or through tiny cracks or other open areas under the carpet. The soiling condition can occur quickly, or it may develop over a period of months or years. The level of soiling is dependent upon the volume of airflow and the level of pollutants in the air. Filtration soiling is not a result of the quality of carpet selected. The condition will obviously appear more pronounced on lighter colorations than darker colorations.
Filtration soil areas may appear around baseboards, under doors, along the edges of stairs and possibly away from walls where plywood sub-flooring materials have been joined. Generally, the concentrated air flow will be from an upper level to a lower level of the home.
As indicated, filtration soiling can occur under closed interior doors where a central heating, ventilation, and air condition (HVAC) system is utilized. When possible, open Interior doors to reduce filtration soiling that may develop under closed doors while the HVAC system is in operation.
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