A natural stone shower is a stunning feature in any bathroom, adding timeless elegance and value to your home. However, because of the constant moisture and humidity in showers, mold and mildew can develop over time, making regular cleaning and maintenance essential. Proper care ensures that your stone shower remains beautiful, functional, and free of unsightly mold spots.
Whether you have granite, marble, slate, or travertine, this guide will walk you through the safest and most effective ways to remove mold without damaging your stone.
Why Mold Grows in Stone Showers
Mold thrives in damp, humid environments, making showers a perfect breeding ground. When water lingers on porous stone surfaces, mold spores settle in and begin to grow. Over time, this can lead to dark stains, unpleasant odors, and even structural damage if not properly addressed.
The main reasons mold appears in stone showers include:
✔ Poor Ventilation – Lack of airflow allows moisture to build up.
✔ Unsealed Stone – Porous surfaces absorb water, providing a perfect environment for mold.
✔ Standing Water – Puddles left after showers create prolonged dampness.
✔ Soap Scum and Residue – Organic matter left behind from bath products feeds mold growth.
Regular cleaning and proper sealing are key to preventing mold from taking hold in your stone shower.
Safe and Effective Ways to Remove Mold from Stone Showers
Not all cleaning solutions are safe for natural stone. Many conventional mold removers contain acidic or abrasive ingredients that can erode and dull stone surfaces. Here’s how to clean mold the right way without damaging your shower.
Step 1: Gather Your Cleaning Supplies
To safely clean mold from your stone shower, you’ll need:
✔ pH-neutral stone cleaner (avoid vinegar, lemon juice, or bleach)
✔ Soft microfiber cloths or sponges
✔ Soft-bristled brush (like a toothbrush)
✔ Hydrogen peroxide (for stubborn mold)
✔ A spray bottle
✔ A dry towel or squeegee
Step 2: Use a Gentle Stone Cleaner for Light Mold Growth
For routine mold removal, a pH-neutral stone cleaner is the safest option.
- Spray the affected areas with the stone-safe cleaner.
- Let it sit for 5-10 minutes to loosen mold and soap scum.
- Use a microfiber cloth or sponge to gently wipe away mold.
- Rinse thoroughly with warm water.
- Dry the area using a clean towel or squeegee.
This process should be done weekly to prevent mold from returning.
Step 3: Tackle Stubborn Mold with Hydrogen Peroxide
If mold has penetrated deeper into the stone or grout, hydrogen peroxide is a safe alternative to bleach.
- Mix equal parts hydrogen peroxide and water in a spray bottle.
- Spray directly onto the moldy areas.
- Let it sit for 10-15 minutes to kill mold spores.
- Use a soft-bristled brush to gently scrub mold from grout or stone.
- Rinse with warm water and dry the area completely.
Hydrogen peroxide is effective at breaking down mold without causing damage to natural stone.
Preventing Mold Growth in Stone Showers
While regular cleaning is important, preventing mold in the first place will save you time and effort in the long run. Here are some simple maintenance tips to keep your stone shower mold-free.
1. Keep the Shower Dry
✔ Use a squeegee after each shower to remove excess water from the walls and floor.
✔ Dry the shower with a microfiber cloth or towel to prevent water from sitting on stone surfaces.
✔ Leave the shower door or curtain open after use to improve air circulation.
2. Improve Ventilation
✔ Run an exhaust fan during and after showers to reduce humidity.
✔ Open windows when possible to allow fresh air to flow.
✔ Consider using a small dehumidifier in the bathroom if moisture levels are high.
3. Seal the Stone Regularly
Natural stone is porous and needs to be sealed to prevent moisture absorption.
✔ Seal your stone shower every 6-12 months using a high-quality stone sealer.
✔ Test if your stone needs resealing by sprinkling a few drops of water on the surface—if it absorbs quickly, it’s time to reseal.
4. Use the Right Bath Products
✔ Avoid using bar soap, which leaves behind residue that can encourage mold growth.
✔ Switch to liquid body wash, which rinses off more easily.
✔ Store bottles on a shelf or rack, rather than directly on the stone, to minimize product buildup.
What to Avoid When Cleaning a Stone Shower
To protect your stone shower, never use the following cleaning products:
- Vinegar or Lemon Juice – These acidic substances can etch and dull stone surfaces.
- Bleach or Ammonia – Harsh chemicals can damage stone and weaken grout over time.
- Abrasive Scrubbing Pads – Steel wool or rough brushes can scratch natural stone.
Always use cleaners specifically labeled safe for natural stone to maintain the beauty and longevity of your shower.
When to Call a Professional
If mold continues to return despite regular cleaning and prevention efforts, there may be deeper issues such as poor drainage, leaks, or excessive humidity. In these cases, a professional stone restoration specialist can:
- Deep clean the stone and grout.
- Reseal the stone to improve water resistance.
- Assess any underlying moisture problems.
Maintaining a clean and mold-free stone shower doesn’t have to be a struggle. By cleaning regularly, keeping the area dry, sealing the stone, and improving ventilation, you can preserve the beauty of your shower for years to come.
If you’re considering installing a new stone shower or need expert advice on maintaining your existing one, Wholesale Granite Direct is here to help. Call us today at 817-962-2616 (Arlington) or 817-710-8604 (Granbury) for expert stone care and installation services!
