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Tips to Prevent Mold & Cracking in Bathroom Grout
Tips to Prevent Mold & Cracking in Bathroom Grout
21/Jun/2025

In a freshly tiled bathroom, grout is what fills the gaps, seals out moisture, and ties everything together with a clean and finished look. Sadly, it can crack, crumble, and even grow mold over time. When that happens, your sleek bathroom starts to feel... icky. So, how do you keep your grout from turning into a problem?

Tips to Prevent Mold & Cracking in Bathroom Grout

In this brief article brought to you by Mr. Handyman, we offer our two cents on how to prevent grout from cracking and breeding mold and mildew. If you'd rather have a handyman handle the dirty work, or if the damage is done and you need grout repair, then the crew at Mr. Handyman is the one to call. Our 1-year workmanship guarantees ensures you enjoy a peace of mind.

Why Grout Matters More Than You Think

To be frank, most people don't give grout a thought let alone a second thought. The ones that do might think grout’s just there for looks - but it does a lot more behind the scenes.

Grout holds your tile in place and keeps moisture from getting into the walls or under your floors. When it’s in good shape, it helps your bathroom stay cleaner, drier, and safer. When it’s in bad shape, though? That’s when leaks, mold, and water damage start creeping in.

The good news is that cracked and moldy grout can be fixed and even prevented... if you know what to watch for. Let's look into some ways to prevent the damage in the first place.

Tip 1: Keep Things Dry

This one might seem obvious, but it's worth the emphasis: mold loves moisture.

Bathrooms are naturally humid, and mold thrives in places that stay damp - like the spaces between your tiles. So, take a moment to squeegee down the walls after showers or baths. Further, run the exhaust fan for at least 20 minutes. If you don’t have a fan, then crack the window and leave the door open to let some of that steam escape.

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Tip 2: Use a Grout Sealer

If your grout isn’t sealed, then it's basically a sponge for moisture and grime. Sealing creates a buffer that protects grout from soaking up water, soap scum, and mildew. Not sure if your grout’s sealed? Splash a bit of water on it. If the water beads up, you’re good. If it soaks in, it’s time to reseal.

Here’s the catch: grout sealers don’t last forever. You’ll need to reapply them every 6 to 12 months, depending on how often your bathroom is used. If your grout is already stained or damaged, then a professional grout repair service like Mr. Handyman's can clean and reseal it the right way.

Tip 3: Scrub Smart, Not Hard

It’s tempting to break out harsh scrub brushes or bleach when mold shows up, but aggressive scrubbing can actually damage grout. Cracked or crumbling grout is more likely to trap moisture and grow mold again.

Instead, clean your grout with a soft brush and a gentle cleaner made for tile and grout. Vinegar and baking soda can work in a pinch, too, but steer clear of anything that’s too acidic or abrasive.

If your grout is already cracking, even the best cleaner won’t fix the problem. That’s where grout repair becomes necessary. Re-grouting small areas or even spot-filling damaged sections can help.

Tip 4: Watch for Early Warning Signs

Grout doesn’t just fall apart overnight. Usually, it gives you some warning signs first. Watch out for:

  • Hairline cracks between tiles
  • Discoloration or stains that keep coming back
  • Loose tiles or soft spots in the wall
  • Musty smells even after cleaning

Ignoring these signs only lets the problem get worse. The team at Mr. Handyman can assess the damage, repair or replace bad grout, and seal everything up so it lasts.

Don’t Let Grout Problems Grow

With regular cleaning, sealing, and the right backup from reliable handymen, your grout can stay strong and spotless for years to come. If you're looking for trained professionals who can give your grout the refresh it needs, the crew at Mr. Handyman is the one to call. Contact us today to get in touch!

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