Because the donor area is filled in either with a piece of remnant carpet or is left unrepaired carpet patching is considered to be imperfect but a net overall improvement.
Can you fix a patch of carpet.
Properly planned and executed.
Carpet patching is a simple system of carefully cutting out the damaged area and replacing it with a patch of donor carpet of the same size.
Apply carpet adhesive to the fabric and to the carpet edges that surround the hole you cut out.
Keep in mind that if you plan on replacing the carpet the patch will adhere to the padding making it harder to salvage the pad.
Use the utility knife if you need to cut the old tape at the end of the seam.
A line or 2 of glue on the surface of the carpet pad will often be sufficient.
Orient the patch so the grain of the carpet runs the same direction as the installed carpet then.
If you re using carpet tape stick it onto the base floor as well.
Remove the old carpet tape from under both sides of the seam or rip.
Tools and supplies you will need.
Use the utility knife to lift the edges of the seam or rip.
Apply some carpet adhesive onto the patch requiring floor.
If those fraying discoloring factors have concentrated in one particular section of your carpet you can patch the installation rather than replace the entire thing.
If carpet tape is not doing the job you can also use carpet glue to hold the patch in position.