If it were black gray blue or pink it would indicate mold growth.
Pink discoloration on vinyl flooring.
I have seen it discolor around heat vents and i have seen this same type of discoloration underneath refrigerators usually directly under the compressor.
If the stain is yellow it s probably an adhesive stain.
It may be the adhesive that was used to adhere the vinyl to the concrete or it could be the result of moisture rising up through the concrete.
I have seen this type of discoloration when the flooring is exposed to direct sunlight.
The discoloration will duplicate the shape of the patch in the underlayment.
I have not seen it occur on the newer vinyl floors though.
Specifically streptoverticillium reticulum a bacterium often found in soil and rotting vegetation.
Defining the phenomenon vinyl discoloration can take on a myriad of hues including yellow orange blue and pink.
If the vinyl flooring can t be replaced right away there are a few tips for removing the stain and increasing the longevity of the vinyl floor.
Products on the market.
Discolored vinyl flooring near or under a toilet is unsightly but it can also indicate a problem such as a leaking toilet.
Linoleum vinyl flooring pool liners pvc vinyl roofing membranes and any other areas where light colored plastic and polymer materials come into contact with water are also susceptible to the streptoverticillium reticulum pink stain.
Sound useless and obscure.
While the material is pink the discoloration to the floor will be yellow.
This will dissipate the yellowing but will take some time perhaps days or even weeks.
Seen it numerous times.
According to priddy the primary cause of discoloration is the migration of trace chemicals from adjacent materials laminated to the pvc.
The discoloration happens for a number of reasons especially if rubber mats are used on them.
Open the curtains and allow as much natural light as possible in the area.
Pink stain is caused by the growth of microorganisms on the surface of a plasticized vinyl or other polymer.
Fix it the solution for this type of discoloration is to expose it to natural light.
Then you d have to solve a moisture problem before laying your new floor.
Most of the time discoloration comes from the top down meaning that the buildup or soil from foot traffic is affecting the wear layer of the vinyl and not resisting the results of use.
Sometimes a leaking toilet can damage floor coverings and underflooring without creating any obvious signs.
Not all leaking fixtures leave puddles on the floor.
See further down below to find our more information about pink stains on vinyl and linoleum flooring.