Burnt stains on carpet occur when an ash from a cigarette accidentally drops to the floor or an ember escapes from a fireplace. Normally the burnt threads need to be removed, and depending on how deep the burn goes into the carpet, can be fixed by either lightening the stain or covering it with new thread fibres. Burnt carpet areas can be fixed when you know the right way of treating them.
Trim the burnt fibres from the carpet with scissors. Snip at the fibres a little at a time, making sure not to snip any unburnt threads in the carpet.
Pour a small amount of hydrogen peroxide on a rag and dab onto the black burnt stain on the carpet. The hydrogen peroxide lightens the fibres in the carpet, masking the stain.
Continue to blot the peroxide on the stain until the stain lightens to your satisfaction.
Dry the area with a fan or hair dryer.
Clip the burnt threads from the carpet.
Trim threads from an old carpet piece or from an area of carpet that is inconspicuous, such as close to a baseboard or inside the corner of a closet.
Place bonding glue on the trimmed area of burnt carpet. Dab two to three drops of glue on the carpet.
Apply the cut threads of carpet onto the glue. Place a paper towel over the area, then place a heavy book or books on the paper towel to weigh down the trimmed carpet into the glue. Leave on top of the carpet overnight.
Remove the book and paper towel, and trim any carpet threads that may appear taller than the rest of the carpet.
When a hole is burnt through the carpet, an entire piece of carpet may need to be removed and replaced by a professional carpet installer.