This has to do with the hvac system and how the forced air comes into the room at a higher speed than it can leave.
Remove black edges carpet.
Over time the carpet will become discolored with all the trapped pollutants causing the black lines on the edges of your carpet.
Agitate the pile of carpet with a hard bristle brush or a pull scraper.
Sometimes called filtration lines they also occur along the bottom edges of closed doors and they can be difficult to remove.
Do you have black lines forming on your carpet along the walls under doors around air vents or along the edges of your stairs.
Place the crevice tool on your vacuum cleaner hose and run it along the affected area.
Removing those black marks around the edges of your carpets.
Dark dirty lines around baseboard edges on carpeting is caused by filtration soiling.
Is your carpet appearing to turn gray or black along the edges of your room.
Dip a clean white rag in warm water and vigorously scrub the black marks on the carpet.
Here is how to deep clean the dirty carpet edges.
Instead of trapped air leaving through the ventilation system it will try to leave the room between cracks along carpet and baseboards along.
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.
Scooping food or soil out of the carpet tends to grind the materials further down into the fibers.
This is how keech clean removes the black lines from around the edge of your carpet.
After several years the edges of the stairs especially where the risers meet the wall have turned almost black.
The longer a stain interacts with carpet or rug fibers the greater the chemical reaction between the fibers and stain will be and the harder it will be to remove.
The carpet edges in the room also are turning dark.
Common air pollutants that are the main culprit of staining the carpet include smoke from cigarettes dust candles cooking oil soot from a fireplace and dirty hvac and air duct systems.
Don t fill the gap between the front edge of the skirting and the floor the fitter will need that gap to tuck the edge of the carpet into for a neat finish it s gaps further back you should be looking for and make sure you allow plenty of time for the sealant to fully.