It could be because you used too much water in mixing that causes the grout to dry at different rates. Sometimes it is because there was too much water used to clean up the grout during the installation process and you pull out color pigment in some areas of the grout and not so much from other areas.
You could be asking “Why does the grout color vary?”
The grout will vary in color more often than not to some degree. Although the grout color can vary excessively due to poor workmanship practices. The grout color can vary due to how fast or slow the grout dries. One area of the tile installation may dry faster or slower than another area that can cause the grout color to look somewhat different.
One more inquiry we ran across in our research was “Is there such a thing as natural gray Grout?”.
I haven’t seen a natural grey grout look cream in color. It is a light gray color normally. Cementitious grouts do tend to very in color depending on how it is applied and depending on what are the environmental conditions such as temperature, humidity and wind.
While black grout against white tile is absolutely stunning when it’s first installed, it can quickly become a small nightmare. Does black grout fade? Yes, unfortunately, black grout fades over time. Grout, regardless of color, is extremely porous and essentially takes on anything that it comes in contact with–unless it is properly sealed .
Why is my tile grout turning black?
When you moved into your home, chances are your tile looked new and fresh. After time, however, tile grout can turn black, making the entire area look dingy and dirty. Truth be told, this may not be a reflection on your cleaning habits. Tile grout turns black for a number of reasons.
Why is my shower grout turning black?
Tile grout can also turn black due to mold. Mold usually develops in areas where there is high humidity or in areas with moisture. Mold is commonly found on bathroom shower tiles or floors and also on kitchen backsplashes.
We have found that even after our black grout has been thoroughly cleaned and sealed, within a few months, I notice it fading in spots where water hits it the most. Here’s the worst spot in the shower . I just cleaned it about 5 days prior to this photo, so it’s not overly dirty, either– it just tends to fade in this spot.
How do you get rid of black mold in shower Grout?
Here is a safe, simple, and quick way to get rid of black mold growing on the grout in your shower. Just pour some peroxide on the mold itself, or you can apply the peroxide to the brush and then begin to scrub the molds growing on the grout.
The grout used in most showers is simply a mixture of cement, sand, and water. This makes it porous and absorbs water easily. When the grout is not sealed correctly, it will absorb water, dirt, and other liquids like a sponge. When this happens, mold will begin to grow on the surface of the grout because it has a food source and moisture.