Why is My Grout Turning Pink!? The Cause and Solution to Discolored Grout
- Michelangelo DeCaro
- Apr 1, 2024
- 4 min read
1. An Introduction to Pink Grout
Have you noticed that the grout in your shower is looking a little gross lately? When it was first installed it was clean and crisp, but now you’re wondering why your grout is turning pink. How would it feel to have guests use your bathroom and see that gross looking grout under their feet? “What is causing this and is it bad for my health?” is a commonly asked question by many frustrated homeowners. This issue even prevents many people from incorporating tile into the design of their bathroom when they plan their bathroom remodel.

Grout is an essential component of any tile installation, serving both functional and aesthetic purposes. However, one of the most common issues that homeowners face with grout is the appearance of pink-ish discoloration. This phenomenon, known as pink grout, can be unsightly and challenging to remove. As a general contractor specializing in bathroom remodels, I want to help homeowners understand the mystery of pink grout and how to prevent and maintain it. In this blog post, we will explore the causes of pink grout, provide tips for prevention, and offer maintenance strategies to keep your bathroom looking fresh and clean.
2. The Causes of Pink Grout
Pink grout is primarily caused by the presence of mildew and algae growth in damp environments. The pink hue is a result of these organisms thriving in the moist conditions commonly found in bathrooms. Don’t be alarmed! Serratia marcescens (or pink mold) is generally harmless. If you accidentally touch it while showering or cleaning, you have nothing to worry about. In rare cases it has been known to cause infections through open wounds or contact with your eye. Additionally, using certain cleaning products containing dyes or chemicals can also contribute to the discoloration of grout lines. The real concern is that it looks disgusting, and you don’t want it to ruin the aesthetics of your bathroom!
Understanding these root causes is crucial for effectively preventing and addressing pink grout issues in your tile installations. In the next section, I'll share the secret to getting rid of pink mold!
3. Getting Rid of Pink Mold
Now that we know what is causing your grout to turn an ugly pink color, let’s talk about getting rid of it! Before I share the solution, make sure you read the rest of this blog to see how to prevent pink mold from growing in the first place! Now, on to the solution...

First, start by scrubbing with a baking soda paste ( ¼ cup of baking soda and 1 tablespoon of liquid dish soap.) Using an old toothbrush or a soft bristle brush, apply the paste to the bacteria and scrub the pink mold away. Once the pink color is gone, you’ll need to disinfect the area. To do this, fill a spray bottle with a 1:1 ratio of bleach and water and spray the area, then let it sit for 10 minutes. After 10 minutes, rinse, and dry the area with a towel.
Important note: If you have natural stone tile, the bleach and water mixture is safe to use occasionally, but due to the high pH level in bleach, it can damage natural stone over time. Seal the stone regularly (1-2 times a year) and keep it as dry as much as possible to avoid needing bleach often.
4. Preventing Pink Grout in Your Home
Unfortunately, there can’t be any shortcuts when it comes to keeping bacteria out of your bathroom. Now that we have identified the culprits behind pink grout, let's focus on prevention methods to keep your tile surfaces looking their best. Start by ensuring proper ventilation in your bathroom to reduce humidity levels that promote mildew and algae growth. Make sure you open a window or run a vent fan to help remove any humidity in the room! Additionally, regularly cleaning, and drying grout lines can also inhibit the formation of pink discoloration. Make sure to use grout sealants to provide an additional barrier against moisture penetration. You should be sealing your tile and grout one to two times a year to ensure they look good as new for years to come! When selecting cleaning products, choose those specifically formulated for grout that do not contain dyes or harsh chemicals. By implementing these preventative measures, you can effectively safeguard your grout from turning pink and maintain a fresh and pristine appearance in your home. grout sealant will ensure continued protection against moisture and stains.
5. Professional Help for Pink Grout Issues
Despite proactive maintenance efforts, some instances may require professional assistance to address persistent pink grout discoloration. Consulting a professional tile and grout cleaning service can provide specialized solutions and expertise for stubborn stains and deep-seated mold issues. These professionals have access to professional-grade cleaning agents and equipment that can efficiently tackle tough grout problems without causing damage. If conventional cleaning methods prove ineffective, seeking professional help can ensure thorough restoration of your grout's original color and quality. A professional assessment can also identify underlying issues causing the pink discoloration, enabling tailored solutions for long-lasting results. Trusting experts for challenging grout issues can save time, effort, and ensure optimal maintenance of your tiled surfaces.
6. Conclusion: Keeping Your Grout Looking Fresh
Maintaining the pristine appearance of your grout, free from pink discoloration, is essential for preserving the overall aesthetic of your tiled surfaces. By implementing regular cleaning routines, using proper cleaning products, and promptly addressing any discoloration, you can prevent pink grout issues from recurring. Remember, prevention is key to avoiding deep-seated stains and mold growth. In cases where you encounter persistent pink grout problems, don't hesitate to seek professional assistance to resolve the issue effectively. Ultimately, with dedication to proper maintenance practices and occasional professional intervention, you can ensure that your grout stays looking fresh and enhances the beauty of your tiled spaces for years to come.
Thinking about Incorporating tile in your next remodel project? Contact us to start planning!
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