Wednesday, April 2, 2014

Have You Noticed Grayish or Dark Lines along the walls on your carpets

You probably do not want to know this, but it is not a defect in your carpet. It is called soil filtration which is a term used to describe dark, gray (sometimes black) lines that appear on carpet. Soil filtration occurs because the carpet acts as a filter to dust and other airborne particles resulting from a concentrated flow of air over the carpet. It is most commonly found around baseboards, under doors and along the edges of stairs.

The primary reason for this concentrated flow of air is pressure changes within a room. Pressure changes occur within a room from either the effect of warmer air rising or from your heater or air conditioner blowing
air into a room without a return vent. Because of the pressure change, air tries to flow either in or out of the room. For walls that are not sealed to the floor, air moves in and out of the room at these areas and that is why you will see it along walls and stairs. For these situations, unless the air leakage areas are addressed, the soil filtration will continue to occur.
 
 
Also, have you ever noticed a grayish or dark line at the doorway of a room? Especially a closet or a room that is rarely used and the door is always shut. Once again, soil filtration. It is quite common for dirt and dust to accumulate under doors when they are shut. Due to pressure differences between rooms (as described above), air will flow from the high pressure
room to the lower pressure through the largest available holes. With the door shut, the undercut of the door is generally the largest available hole. Therefore, as the air passes between the door undercut and the carpeting, the carpet acts like a filter taking out dirt and dust particles from the air. For these situations, you might consider leaving the door cracked so air can move around the door and not under the door.

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  8. That is kinda gross, but good to know. So those lines can be cleaned up. What is the best way to approach them?

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  9. I don't know if I should thank you or not for this post. Now I'm going to have to go through my entire house to check for the grey lines along the carpet! Good to know exactly what it is though, I have noticed it before. It's weird soil filtration can happen indoors.

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  12. We just replaced our carpet with new carpet. Our old carpet had a lot of the grey around the boarders. It was pretty bad and that's the main reason we decided to get new carpet.

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  13. My carpets and upholstery could seriously use a good cleaning. Is it usually pretty expensive to do something like this? I need it done, but I don't have a lot of money to spend. Maybe I can find a good deal somewhere.
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  15. Wow. I honestly thought there was something wrong with our carpets when I saw this. When we got the new carpet, I ignored the advice of friends to have a professional come clean it periodically, because I thought I could handle it on my own. After having it for a while and seeing exactly what you described, I thought there was nothing to fix it. Thank goodness I saw this before I shelled out for new carpeting. I can never seem to get it clean on my own, so I am FINALLY having a pro come take care of it for me. At least now I know how to prevent it after they are done.

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  16. Thanks for sharing this! I did notice the dark grey lines at the edges. Eventually I decided to hire a carpet cleaning service, and they got rid of it. I think I might also have to invest in a better vacuum! Thanks for sharing!

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  18. it is kinda an icky truth. That line on the outside of your carpet is dirt and grim accumulating. When I bought my carpet cleaner, i made sure it had a hand-held piece. That way every month when I am cleaning my carpets, I can focus on those dirt-accumulating spots.

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  19. I haven't noticed these grayish lines you are talking about but my carpet does have water damage. I don't know what I am supposed to do to fix this! I am going to call a professional carpet cleaner today to look at it and hopefully they will be able to help me out!
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  23. Thanks for all the great tips. After reading this I went and checked all my doorways and your exactly right. I'll have to get those hard to reach areas cleaned right away. http://www.discountcarpetnw.com/bremerton-wa-carpet-flooring.htm

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  25. I had always wondered what caused that. Is there really no way to prevent it? I guess I'm fine with cleaning it. I wish we could fix the air flow so it wouldn't happen.

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  32. Now that I really think about it, I think I have noticed those grey outlines. I think the main reason they are appearing there is because dust is just collecting up in a spot where cleaning can't reach.
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