How to repair grout

Compared to other DIY home improvement projects, bathroom renovations offer a great value for your money. That said, a bathroom renovation can also be a lot of work, especially if you’ve decided to learn how to remove grout from tile.

For many DIYers, much of the time and effort that goes into their bathroom renovation project will be spent regrouting tiles . Depending on the size of the room, removing the old grout by hand can take the better part of a day. However, you can cut the time considerably by using an oscillating power tool to remove grout.

When wondering how to remove grout, working with an oscillating power tool is far better than using a grout removal tool like a grout rake. Oscillating tools are easy to handle, versatile, perfect for working into small spaces. That’s why using one is considered the best way to remove grout. In this post, you will learn why you should remove grout and how to remove grout from tile using your oscillating power tool.

Why Remove Grout?

Grout fills the gaps between tiles and it helps to hold them in place. While the tiles themselves may last a long time and resist staining, grout is more porous and likely to stain and wear down over time.

In many cases, you can clean the grout to make it look good as new, but if mold and mildew are left for too long, the grout can get stained and it will not come clean. If the grout is either old and deteriorated or stained, the only option to get the tile looking good again is to remove the old grout with an oscillating multi-tool or other piece of equipment and regrout the surface.

Beyond re-grouting the tiles, you will also want to apply a grout sealer . A sealer can help to protect the grout and prevent staining. It will also hold up better under the conditions of your bathroom. If the surface is properly sealed, cleaned regularly, and resealed when it is needed, the grout will last much longer.

What You Need to Remove Grit from Tile

One of the best ways to remove grout is with an oscillating power tool. This will make grout removal from tile much easier. Along with an oscillating tool, you will need a utility knife and a grout rake. If you do not have a grout rake, you can use a flathead screwdriver as a replacement for this grout removal tool. Additionally, you will also need carbide-grit segment saw blade for your oscillating multi-tool.

If you are looking for an oscillating power tool that can work well for grout removal and a wide range of other DIY jobs, the 20V Cordless Oscillating Multi-Tool is a great option. The cordless design means you do not have to worry about running a cord and the 20V battery offers plenty of runtime for long projects. It is also lightweight and easy to handle, making it an ideal grout removal tool.

How to Remove Grout from Tile Using an Oscillating Multi-Tool

When you’re ready to use your grout removal tools, start by fitting the carbide-grit bit into the oscillating multi-tool. Once the tool is ready, turn it on and work the blade straight into the seam between two tiles. You do not want to use a lot of pressure when working the blade into a seam. The best way to remove grout from tile is to apply gentle pressure and let the tool do most of the work.

With most of the grout removed using that straight cut, you can now slowly angle the blade of your grout removal tool up and down to remove more of the grout from the seam. You just need to work slowly and be careful not to damage the edges of the tiles.

Once the seam is mostly clear, you can put down the oscillating tool and move to working with your grout rake or screwdriver. Just get the blade of the grout removal tool in there to scrape out any bits of material that would not come out with the power tool. If there is still some grout that refuses to come out with the screwdriver, you can then try using a utility knife to clean out the last remaining pieces of grout.

No matter what grout removal tools you use, the process will take some time and a lot of work. However, now that you know the best way to remove grout from tile, it’s clear that using the right tools can make a significant difference. If you are looking for the best way to remove grout quickly, an oscillating power tool is the right tool for the job.

Shop the best oscillating multi-tools to make grout removal quick and easy at WORX!

If the spaces in between the tiles in your bathroom and shower are dirty or unsightly, you can do a quick grout repair job on the seams to make them look new again. Cleaning and repairing grouted seams in tiles is an easy DIY job. You can usually complete the job in a couple of hours. This easy to follow how-to guide will walk you through the entire process.

Step 1 – Select the Grout

Purchase grout that matches the color of the grout currently used in your bathroom. Unless you’re planning on re-grouting the entire surface, you want to make sure that the new grout color matches as closely as possible.

Step 2 – Remove Loose and Damaged Grout

Use a grout saw to remove the loose or damaged grout in between the tiles. Gently run the grout saw back and forth along the grout seams. Be careful to avoid damaging the tiles.

Step 3 – Clean the Seams

How to repair grout

Use a spray bottle and some cold water to wet the areas where you removed the grout. Then take an old toothbrush and scrub the seams. This will remove the grout you freed with the grout saw. Finally, wipe away excess water or grout with an old towel or rag.

Step 4 – Mix the Tile Grout

Refer to the instructions on the bag or box of tile grout you purchased. Follow the directions precisely when mixing the grout. You can mix the grout in an old plastic container or something that you can dispose of later.

Step 5 – Spread Grout

Use the grout float to fill the seams. Try to fill them completely, making sure the grout is as level and straight as possible. Use a small edge of the grout float to match the beveled grout surface used on the other tiles.

Step 6 – Clean the Tiles

How to repair grout

Working in small sections, clean the tiles with a sponge to remove any excess grout as you go. If you wait too long to clean the tiles, the grout will dry and be harder to remove. If the grout does dry and become hard, use a putty knife or plastic scraper to scrape the grout away. Then, use a damp rag to wipe the loose grout and residue way from the tiles and seams. Allow the tiles to dry before continuing.

Step 7 – Polish Tiles

Once the tiles have dried, take a soft towel or an old t-shirt to buff the tiles where the grout was applied. Sometimes the grout will cause the tiles to lose their luster or shine. If you buff the area for a few seconds with a dry cloth, the shine on the tiles should return.

If you are experiencing unsightly grout discoloration, The Grout Medic offers three unique ways to remedy it.

No one likes to look at their once-beautiful tiled surface, made less appealing by discolored grout. If you are wondering how to fix discolored grout and are considering tearing out your beloved tile for a total re-installation due to stained grout, The Grout Medic offers easier, less costly solutions.

How to repair grout

If your grout is relatively young, chances are the discoloration you see is due to the simple build-up of dirt and cleaning agents. With an in-home consultation from a Grout Medic technician, we can tell you whether your discolored grout requires only grout cleaning to remove the build-up acquired over time, or requires a more advanced service. Our grout cleaning delivers a blast of 310°F water vapor to safely and effectively loosen and force out grime, mildew, and even mold. This would be our simplest solution to rectify discolored grout.

How to repair grout

Grout cleaning is the simplest solution for fixing discolored grout

If your aged grout is discolored beyond cleaning and is facing breakdown issues, The Grout Medic offers professional regrouting. This not only means that your tiled area will be completely rid of all your old, stained grout, but you can also even choose to have a brand new grout color applied to revamp the look and feel of your tile.

How to repair grout

Regrouting is one way to fix discolored grout or change the color of your grout

Wondering whether it’s time to regrout? Read: How do I know if I need to regrout my shower?

One of the hottest trends in grout is grout color staining. The Grout Medic utilizes grout staining agents to completely renew the look of your discolored grout. Our color sealing service includes grout cleaning first. Then, we apply stain, which penetrates the surface of your grout to either completely change your grout color or simply restore your grout’s color to a uniform finish. If you have asked yourself, “How do I change the color of my grout,” you have probably seen DIY solutions, such as painting your grout. The Grout Medic does not recommend painting your grout. Paint will sit on top of the surface of your grout, and peel away in short order. To remedy your discolored, uneven grout, or to change the color of your grout completely, trust the professionals at The Grout Medic.

How to repair grout

Grout color staining can change the color of your grout

Are you searching for solutions for fixing your discolored grout, or changing the color of your grout? The Grout Medic will offer the best solution for your needs with a no-obligation consultation. Get in touch with us by filling out our form here. We look forward to hearing from you!

If you wish to maintain a clean, shiny bathtub that both your family and guests can enjoy, it’s important to know how to repair grout around your bathtub, especially if you are planning to remodel your bathroom.

Before you learn to manage grout, you should first understand that grout is the valuable “glue” that seals the tiles of your bathroom area. It’s a needed construction material that must be clean and maintained at all times. Grout is a reliable material, usually made from cement or mortar, used to fill in cracks and cavities that could potentially ruin the appearance and/or function of your bathtub area.

Yet aged and dirty grout around bathtubs gives the whole bathroom a less than clean look. Most home improvement experts agree that, when it comes to grout, replacement is the true key to repair. The application of new, fresh grout can add a whole new sheen to the area surrounding your bathtub, creating a cleaner, more polished look.

Steps to Repair Grout Around the Bathtub

Step1: Clean the Surroundings of the Bathtub

Before you apply new grout around your bathtub, you must first remove the old, excess stuff that posed the problem in the first place. Many people use a razor blade for this purpose, though you must be careful not to scratch the tub. Others prefer to use a proessional grout saw or the sharp end of a utility knife. Regardless of the tool you choose, it’s important to handle this tool carefully, applying it only to the excess grout you wish to remove.

Step2: Clean Grout

The next step is to use a damp cloth coated either with water or a solution of 50 percent water, 50 percent bleach to clean your work area, removing any remaining traces of grout, along with the fungus and mildew that accompany it.

Step3: Apply New Grout

Now it’s time to apply the new grout, which can be purchased either in its purest form or perhaps pre-mixed. If the grout has not been mixed, you may have to add water to the mix and then apply this mixture with the help of a spatula or other helpful household tool. Once the application is complete, allow your work area to dry for 24 to 72 hours, or as recommended by package instructions, then clean the excess grout with a gentle, non-scratching abrasive pad.

Step4: Apply Grout Sealant

The final step is to apply a grout sealant, again cleaning up any excess liquid after allowing appropriate time for drying.

As other grout management options, you can search local home improvement stores to seek tools and products to recolor or remove mold and fungus from existing grout. You even have the option of painting grout, with the use of artist brushes or a toothbrush-style tool.

Regardless of how you choose to manage and repair your bathtub grout, your primary objective will always be a cleaner, shinier tub area; an area that maintains a new, fresh look, regardless of its age or degree of use.

Bathroom tiles that have cracked grout are more than unsightly, they can also result in damage if left unchecked. By following some steps, you will find that fixing this problem is not as difficult as it may initially seem.

Step 1 – Inspection

Fully examine the entire shower unit to find every instance of cracked grout that needs to be repaired. Stick a small piece of masking tape next to each so that you do not lose track of it. Examining all the points of damaged grout will also enable you to determine the method of repair that is required. Grout that has remained firm despite being cracked will need to be treated differently to that which yields to pressure or flakes away.

Step 2 – Gather Tools and Equipment

How to repair grout

Be aware that grout is available in different colors and, if possible, you should take a loose piece of the cracked grout with you to the hardware store so that you get the correct shade. Do not worry if you cannot get the exact match as slight shade amendments can be made by adding more water or grout mix to lighten or darken it respectively.

Step 3 – Remove Grout

Using a grout saw, remove the cracked grout by carefully running the saw across it so that you do damage the surrounding tile or any undamaged grout. Only follow this procedure for sections of grout where the damage is extensive. Hairline cracks that do not appear to have affected the integrity of the grout can be rectified with grout sealer. Once this process is complete, use a brush to clear away the resulting dust so that you are working with a clean surface that will allow the new grout to stick.

Step 4 – Mix Grout

Mix the grout in a clean bucket in accordance with the instructions, making slight adjustments with small additions of water or additional grout to obtain the correct shade.

Step 5 – Apply Grout

How to repair grout

Apply the newly mixed compound to the holes created by the removal of the old cracked grout. Gather some grout onto a putty knife and smooth it into the hole as cleanly as possible until the hole is filled. As you go along, even out the surface of the new grout with a water dampened finger or a putty knife with a rounded tip. Use a damp sponge to gently wipe away any excess from around the repair site and the surrounding tiles, taking care not to dislodge the tiles or remove the grout you have just applied. Allow the grout to dry completely in accordance with the manufacturer’s advice and return to it to use a cloth to buff away any traces of grout remaining on the tiles.

Step 6 – Seal

To protect your work and to reinforce the sections of minor damage, such as hairline cracks, apply some grout sealer after the grout has dried. Leave this to dry thoroughly in accordance with the instructions before using the shower again.

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Properly installed tile and grout should allow for the normal expansion and contraction of tile flooring; however, even minor earthquake tremors, such as those that occur in the Bay Area, may cause the grout to begin to crack and crumble. Once the grout cracks for any reason, it’s time to repair broken grout before there is any damage to the surrounding tiles, warns Home Adviser. While grout may crack from wear and tear, an uneven or weak subfloor may be causing the problem. If you need to repair grout numerous times on any one floor, ask an engineer to look into the underlying cause of the problem.

Take Your Measurements

Measure the width of the grout lines on your tile floor. If the lines are less than one-eighth of an inch, you need unsanded, epoxy or acrylic latex grout. Grout lines wider than one-eighth of an inch need sanded grout. The exception to this is marble tile floors. Sanded grout scratches the surface, so use unsanded, epoxy or acrylic latex on them.

Grab a Grout Sample

Remove a small sample of the broken grout to take with you to the tile or home improvement store. Match new grout to the sample. You might be able to use more or less water as you mix the grout to get an exact match on the grout shade, but doing so may affect the quality of the grout’s texture and its structural integrity.

Clean the Area

Mix 1 part white vinegar with 1 part water. Clean the area of broken grout with the vinegar mixture.

Remove the Damaged Grout

Cut out the damaged grout with a grout saw. Insert the blade of the saw, which looks like a screwdriver or round handle with a saw on the end, into the joint with the damaged grout. Move the saw back and forth along the joint to cut out the grout. If the grout is particularly difficult to remove, apply more pressure to the grout saw as you move the saw along the joint. Take care not to damage the tiles.

Remove Excess Water

Wipe a damp paper towel over the grout line to clean it out. Remove any excess water puddled in the grout lines. Leave the sides of the tile slightly damp to help the grout bind to the tiles.

Mix and Apply the Grout

Follow package directions for adding the correct amount of water to the grout you selected. Pre-mixed grout has the proper proportions of sand, if necessary, and Portland cement. Add water to the grout in a disposable mixing container. The grout should hold together in a ball when it’s the proper consistency. Push the grout into the joint with a grout float. Smooth the joint with the rounded end of a craft stick.

Note: If you have small, hairline cracks in the grout, mix a small amount of unsanded grout and apply it directly into the damaged joint with your finger. Wipe off any excess from the surrounding tiles and allow the grout to dry.

Wipe Down the Surface

Wipe the surface of the surrounding tiles with a clean, damp sponge. Rinse the sponge frequently to avoid smearing grout onto adjoining tiles, advises Home Construction and Improvement. Allow the grout to dry following manufacturer’s recommendations. Temperature and humidity may affect drying times.

Clean the Surface

Clean the surface of the surrounding tiles completely with a soft cloth. If the cloth doesn’t remove the haze, mix 1 part white vinegar with 1 part water. Wipe this mixture over the tile with a clean sponge. Wipe it dry with the cloth.

Use a Grout Sealer

Apply a grout sealer with a small paintbrush following manufacturer’s directions. Allow the grout sealer to dry.

How to repair grout

How to Repair Concrete Grout

The grout that sits between concrete slabs or bricks in some patios, pathways, basements, and garages is made as strong as cement. It has the strength to hold your brick and concrete walkways together for years. However, due to cracks that form over time, eventually repairs will be required.

Not fixing cracks and damage in a timely manner can lead to an unsightly appearance and further damage. Repairing concrete grout is a simple task that requires a grout saw and grout. To learn how this process works, read on!

5 Easy Steps for Cement Grout Repair

Remove the grout that has been damaged. You will need to scrape away the grout using the blade on the back of the grout saw. Dig down into each side of the tile where there’s damaged grout. You don’t want to leave any old grout on half of any slab or tile that you are going to be regrouting.

Use a vacuum to remove the debris and dust that you have created from the removal process. Don’t use water on the area.

Mix water with the grout powder inside of a bucket. Stir this mixture thoroughly with a putty knife that’s wide. It should become a thick mud. Then allow it to sit for about ten minutes before stirring it again.

Spread the grout into the lines of the tile that have had grout removed. Press in the grout using a grout towel and scrape off excess grout from the surface of the tile.

Allow the new grout to dry for about ten minutes. Using a damp sponge, you can wipe off the excess grout from the tile. Once the new grout has cured for the length of time mentioned in the manufacturer’s directions, seal it.

Having your cement regrouted is not a complicated process. However, to ensure everything is done correctly and looks great, we always recommend hiring a professional. Decorative concrete structures always looks their best with professional grouting. For decorative concrete in Colorado Springs, you can trust Flat & Fancy, Inc. for your needs. For any type of regrouting services, contact your local Grout Medic or call 1-888-994-7688.

Your perfectly decorated walls have cracks in the grout lines. When you touched to check the crack, it started to crumble away. Now, don’t panic, because it’s fixable.

But does grout go bad?

Yes, it can go bad after 5 to 6 years. If your grout crumbles away with the slightest pressure or touch, it has surely gone bad. Sometimes old mildew can cause deterioration of grout. Using expired or dried grout can also make the grout line crumble faster than it should.

Worried about your grout condition? Then this article might be all you need. We’ve discovered the problems and solutions for you.

Let’s jump right in and solve the issue!

  1. How To Tell If Grout Has Gone Bad?
  2. Why Does Grout Go Bad?
    • Reason 1: Grout Has Gone Old
    • Reason 2: Grout wasn’t mixed properly
    • Reason 3: Grout Has Expired
    • Reason 4: Grout Is Not Sealed Properly
  3. What to Do When the Grout Has Gone Bad?
    • Option 1: Using Caulk Over Grout
      • Step-1: Remove Crumbled Grouts
      • Step-2: Apply Caulk
    • Option 2: Reapplying Grout on the Cracks
      • Step-1: Remove Dirt
      • Step-2: Apply New Coat Of Grout
    • Option 3: Seal the grout
      • Step-1: Clean The Grout Line
      • Step-2: Apply Sealant
    • FAQs
    • Conclusion

How To Tell If Grout Has Gone Bad?

Grout loses its silky white shine over 2-3 years. The water stains, dirt, and other contamination make it discolored soon.

But there are two signs that you shouldn’t ignore. Firstly, check if there’s any mold present on the grout. If there is, there could be mold behind the wall as well. This might be eating away your tile’s lifespan.

No visible mold? Then inspect the texture of the grout. Press your nails with moderate force on them. If it starts to crumble away, it has gone bad for sure.

Why Does Grout Go Bad?

There can be many reasons why grout goes bad. But these are the most common reasons:

Reason 1: Grout Has Gone Old

Grout has a lifespan of over 8-15 years at best. It varies on the condition of your home. It shouldn’t normally have any problems over the first 4- 5 years.

Depending on humidity and contamination, grout starts to go bad. Sometimes molds and mildew grow on the walls, which damages grouts. In those scenarios, removing molds from your walls is important.

Reason 2: Grout wasn’t mixed properly

An important ingredient of the grout is cement. It helps the grout to stabilize. Adding an extra amount of water to the grout mix can ruin the consistency.

It should have a thickness like cake batter. Adding excessive water prevents it from drying and curing properly.

Reason 3: Grout Has Expired

Powdered grouts normally expire after one year. On the other hand, epoxy grouts stay well, as long as they’re not exposed to freezing temperatures.

In your case, it can be that the grout was already bad when it was applied. This is why your grout didn’t last much longer

Reason 4: Grout Is Not Sealed Properly

Tiles and grouts are to be sealed instantly after the installation. Not doing so will allow water and dirt to sink into it. This can lead to failed grout sealing.

If the grout is not sealed properly it gets discolored. Plus it’s also going to fall apart sooner than it was supposed to.

These are the possible reasons for grout going bad.

What to Do When the Grout Has Gone Bad?

There are a few options that can help you with your grout. Here are a few methods you can use to save your grout-

Option 1: Using Caulk Over Grout

If the grout has started to show cracks, apply caulks to fill the gaps. Here’s how you have to do it-

Step-1: Remove Crumbled Grouts

Remove all the cracked grouts with a Dremel or grout saw first. You can use the same Dremel that cuts ductwork. Make sure no debris or dirt is present in the gout line.

Step-2: Apply Caulk

Apply caulks over the vacant spaces gently. You can use a spoon or your fingers to apply it. Press it lightly on the grout line.

Option 2: Reapplying Grout on the Cracks

Apply new grout only if there’s no mold or mildew growing behind the grout. Here are the steps you should follow-

Step-1: Remove Dirt

Get rid of the crumbling grouts first. Use a Dremel or grout remover to clear out them. Make the grout lines depth at least 2 mm.

Once you are done removing, clean the area properly. This way no dirt or debris can get in the way of the new coat of grout.

Step-2: Apply New Coat Of Grout

For regrouting, epoxy grout is a much better choice than any normal grout. Because it’s much more long-lasting.

If regrouting seems too hard, you can always take professional help.

Option 3: Seal the grout

Sealing grout makes it non-penetrable to water. It prolongs the grout’s lifespan.

Sealing will also protect it from getting water stains. This way there will be less tension about lightening your darkened grout later. These steps below will show you how to do seal your grout-

Step-1: Clean The Grout Line

Clean the grout line with a toothbrush and soap water. Make sure there’s no dirt present. You can seal the grout only after repairing the crack lines. For which you can use the methods mentioned above.

After cleaning, let it dry for 45 minutes before you apply any sealant.

Step-2: Apply Sealant

Choose an appropriate sealer based on your tiles. Apply it on the grout line using a spray or a brush. You will find the application instructions in the sealant’s user manual.

Sealing grout is mostly preferable on bathroom tiles. But you can apply them anywhere you want. You can also use caulk over sealed grout if necessary.

That’s it! These are all the methods for fixing your bad grout problem!

Question: How to protect grout?

Answer: Try to keep your grout dry most of the time. Keeping it wet for longer times makes it prone to growing molds. Don’t use acidic cleaners if not necessary. Do a maintenance check every 6 months. Lastly, keep it clean.

Question: How to smooth dry grout?

Answer: Use sandpaper to scrub the grout line without scratching the tile. Rub it back and forth gently. Hopefully, it has gotten smoother now.

Question: How long should I leave the grout before wiping?

Answer: You should let the grout dry for at least 15-30 minutes. Later, you can wipe off the excess grout with a soaked sponge bar.


That was all from us about whether grout is a bad issue. We hope you learned something new and enjoyed this article.