Improper sealing or not enough sealing at the connection points of the hvac can create this draw of air along the edges of carpet.
Carpet black at edges.
You likely have a problem known as filtration soiling occurring.
Insert the crevice attachment into your vacuum cleaner then drag it along the edge of your carpet.
Ever wonder what those black lines are along the edges of your carpet at the baseboards and under doorways.
Do you have black lines forming on your carpet along the walls under doors around air vents or along the edges of your stairs.
As air gets sucked through gaps in the floorboards and baseboards tiny dust particles can get lodged in the carpeting around the edges of the room and create noticeable black lines.
Filtration soiling is pollution that comes from dirty ductwork and settles on your carpet.
But what causes them and what can you do about them.
Sometimes called filtration lines they also occur along the bottom edges of closed doors and they can be difficult to remove.
Is your carpet appearing to turn gray or black along the edges of your room.
The rate at which air leaves the room is lower than the rate of which it enters.
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Reverse directions and vacuum the edge again in the opposite direction.
Removing those black marks around the edges of your carpets draught marks also known as filtration marks or filtration soiling are darkened areas of heavy soiling most commonly found areas around the edges of fitted carpets like the first picture and in internal doorways.
The black or gray line you see around your carpet edges is dust and debris that s settled into the crevice along your skirting boards.
Here is what causes the black lines at the edge of your carpet the issue is known as filtration soiling a problem that comes from an imbalance in the ventilation of the space.
What causes black lines along the edge of your carpet.