Draught marks
DarkDraught marking appears on carpets as dark soiled areas or spots around the edges of rooms and under doorways. In extreme a cases it is found across the middle of a room in the configuration of the floorboards.It is also known as filtration soiling, fogging or dust marks. The cause is always the same! Contaminated air blows through or across the carpet and the carpet acts as a filter, removing any dirt from the air. The resultant draught marking is both unsightly and a pr
