Editor's Note: A house that has just been moved into has suddenly changed color, and the main reason is tiles, flooring, and wallpaper. These three materials are naturally "chameleons," but experts still advise on precautions during purchase, installation, and use. If you prepare in advance, you can effectively control the rate of color change.
Tile discoloration is closely related to water absorption
Case: Xiao Zhu still remembers that the wall tiles in his bathroom started changing color after one month of living there. The originally white glazed tiles turned an uncoordinated gray, and the more he looked at them, the darker they became. He contacted a tile shop, and the factory sent someone to check for half an hour. Before leaving, they told Xiao Zhu, “This isn’t a quality issue with the tiles themselves, but a problem during installation. You need to contact a decoration company.†So Xiao Zhu reached out to the company that had done the renovation. They sent the same mason back, who didn’t investigate much and simply said, “The moisture content of this batch of tiles was too high.†At that point, Xiao Zhu was completely confused—who should be held responsible for the discoloration?
In the market, I met Mr. Wang Yinuo, a long-time tile seller and service provider. In his view, the chance of wall tiles changing color or developing chromatic aberration is not very high. As long as the vitrified tiles, polished tiles, and porcelain sheets are genuine, they shouldn't discolor or change color. However, antique bricks, due to their firing and glazing processes, are more prone to color changes.
However, he also agreed with the mason’s explanation: “Tile discoloration is indeed related to the water absorption rate.†Therefore, when buying wall tiles, it's essential to pay attention to the water absorption rate and glaze resistance. High-quality tiles have low water absorption and good glaze resistance. Even a small amount of moisture on the surface can lead to discoloration. Mr. Wang demonstrated a simple and effective test method: he took a tile, dropped a drop of water on its back, and observed how quickly the water seeped in. He explained that if the penetration is slow, it means the water absorption rate is low.
Additionally, Mr. Wang advised customers to buy tiles from authorized stores or direct retailers. These places usually carry only one brand, ensuring reliable quality and clear sources. He warned against shops that sell multiple brands, as they may mix in unclear or defective products, even passing off foreign tiles as genuine ones.
After parting ways with Mr. Wang, we visited Maifeng Decoration to explore another question: Can tiles cause other tiles to change color? Maifeng, known online as “The First Line,†confirmed that yes, it's possible. Based on Xiao Zhu’s situation, he suggested checking whether the floor tiles had also changed color. If so, it might indicate poor waterproofing, leading to leaks on the walls or floor. With years of experience, “The First Line†emphasized: “Bathroom waterproofing should be done at least twice, and the water test should last no less than 48 hours.â€
But if only the wall tiles changed color while the floor tiles remained unaffected, “The First Line†believed it could be due to the mason being careless. If the tiles weren’t properly soaked before installation, they might absorb moisture from the cement, causing discoloration.
Finally, when purchasing tiles, it’s best to ask whether they are suitable for acidic or alkaline cleaners. Using the wrong cleaner can damage the glaze and eventually lead to discoloration.
Wooden floors are consistent in color, but some worry about fading
Case: Chen Dajie bought solid wood flooring at 528 yuan per square meter, which she was told was a special deal. At the original price, it would have cost nearly 900 yuan per square meter. But when the floor arrived, Ms. Chen was disappointed. Some planks were darker than others, and a few had large knots, which made her feel the product was far from what she expected for high-end solid wood flooring.
The Fudeli flooring staff listened to the reporter’s description and said, “Chen Dajie should be happy because she bought genuine solid wood flooring.â€
It turns out that solid wood flooring often has color variations, textures, and knots. Moreover, due to oxidation, its color will gradually become duller over time. For example, red wood may eventually turn black. In contrast, reinforced or composite wood floors don’t have these issues. Some products labeled as solid wood flooring are actually just veneered, so they won’t change color.
If you want solid wood flooring that changes color slowly, Xiao Li suggests choosing the right type of wood. “For instance, eucalyptus tends to oxidize more noticeably, while other species are more stable.†Also, consider the color: dark tones tend to oxidize less, while light-colored or bright floors may look worse after oxidation.
Before laying the floor, it’s important to do some preparation. Within 48 hours of installation, you can unpack the floor to let it adapt to the room’s temperature and humidity. Then, perform a “pre-sorting†by having workers select and separate the planks by color, assigning them to different rooms or placing them under furniture or in hidden corners.
Low-cost wallpapers are more likely to yellow over time
Case: Netizen “Flying Pig†joined a group buy for wallpaper before the woodwork started. She bought 28 rolls at 175 yuan each. Because the price was cheap, the manufacturer didn’t offer installation, accessories, or returns. When the painter applied the wallpaper, three of the 28 rolls had varying degrees of yellowing. Worse yet, the painter told “Flying Pig†that the rest might not last a year.
Fan Wei, a wallpaper salesperson, analyzed the issue: “It could be a quality problem or old stock that’s been stored for a long time.â€
Fan Wei explained that the discoloration of wallpaper isn’t related to installation or usage but rather to quality. Generally, lower-priced wallpapers come with higher risks. Light-colored wallpapers are especially vulnerable. Imported wallpapers typically have better quality than domestic ones, but they take longer to arrive.
In cities with lots of dust, the parts of the wallpaper near the floor may fade faster than the upper sections. If it's PVC wallpaper, you can spray a soft detergent and gently wipe it with a dry cloth to restore its appearance. For other types of wallpaper, you can use a “safe bleach†solution, apply it to a cloth, then wipe the affected area. Let it sit for half an hour, then rinse with water again.
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