QUESTIONWe purchased a condo that has an 18 x 18 tile floor in the kitchen. It was put in about 10 years ago. The tile looks perfectly fine. No stains, no spots, no obvious dirt. It is kind of a rustic rust/brown/beige color. We put in new carpet in the dining room, but the carpet always looks dirty in the area right outside the kitchen (tile) into the dining room (carpet). I had the tile floor professionally cleaned and the water was black! They have re-cleaned it multiple times and the water continues to be almost black. There is no obvious difference in the tile after the cleaning. What could be the cause? Is it possible the tile is dissolving or something? The floor guy did not think it could be sealed because it wasn't porous enough. There is obviously something wrong or when cleaned the water would not continue to be black. Please Help! My floor is not dirty but continues to produce black water when cleaned.
ANSWERANSWER - The black stain in the water has to be coming from somewhere and caused by something. The question is where and what?
The question is what type of tile do you have? There are many types of ceramic tiles. There are glazed tiles which have an impervious surface or porcelain tiles that are impervious in the body of the tile, there are vitreous tiles that have up to 3% absorption, semi-vitreous tiles that have up to 7% absorption, and there are non-vitreous tiles that can have up to 20% absorption.
There are rustic non-vitreous tiles that can be stained and sealed. Depending on the type of stain and sealer it could bleed color. The cementitious grout between the tiles is absorbing so it could hold a stain and bleed color. So unless we know exactly what type of tile, we can't give an exact conclusion.
I would take a neutral based detergent and apply a solution to the floor and let it soak in. They scrub it with a scrub brush on an extended handle. Then get a wet and dry vacuum to pick up the dirty water. Then I would rinse the floor with clean water a couple of times and each time I would use the wet and dry vacuum to pick up the water. Then take a clean white towel and rub it on the clean tile floor and see if it picks up a stain. If it does, then the tile is the source of the stain.
Then you can apply a penetrating type of sealer over the tile even if the tile doesn't absorb much, but you have to immediately buff the floor dry with a clean lint free cloth. The sealer might keep the tile from continuing to bleed. You may have to re-seal every 6 months to a year depending on what kind of traffic you floor is subjected to. Be sure to test this method out first in an inconspicuous spot to make sure it works to your satisfaction before you apply it to the entire floor.
You can go to our website to the Resource Directory to the Sealer and Cleaner section for a list of manufacturers who you can contact for the cleaner and sealer products you decide to use. https://ctasc.com/category/resources/cleaners-sealers/