These black marks will be usually more visible around radiators, under doors (in particular the airing cupboard) No matter what you try , it didn’t work! You may also have even had professional carpet cleaners in which might have made it a bit better.
In the cleaning and flooring trade these black lines are referred to as draught marks.
These black marks are caused by the movement of air. Air contains pollution and it has this amazing ability to find a way through into your home. The reason is that hot air rises. Even where the carpet gripper pierces through the carpet backing, the air will flow through and will form black dots or line on the surface of the carpet.
So how to stop the black marks around the edge?
First of all, you will need to try and stop the airflow, with any flooring installation the sub-floor will need to be fit for purpose. You can lift up the carpet and lay a thick sheet of card, overlapping them and sticking them down with tape, and then around the edge of the seal the edge with mastic or caulk. If your sub-floor is made from pine it is better to lay sheets of plastic down and seal the edges. Once you have sealed the floor properly you will then be able to lay your carpet.
So what can be done if the marks are already there?
Once you have addressed the problem of drafts, you can then ask a professional carpet cleaning company to clean the carpets, although 100% removal can not be guaranteed and the marks might return after time.
If you would like more information about this or any other flooring problem why not give our team a call today on 01223 863632.