If you need to remove existing grout from between porcelain tiles for any reason, it can be a tedious process, but is completely doable with the right tools and techniques. Porcelain tile is durable, but the grout between tiles is more susceptible to damage over time. So, replacing discolored or cracked grout can give your porcelain tiled surface a fresh, clean look again.
Let me walk you through how to remove dried grout from porcelain tile.
Reasons for Removing Grout from Porcelain Tile
There are a few main reasons you may need to remove old, dried grout from porcelain tile. Some of these reasons include:
To Change the Grout Color
If you want to update the look of your porcelain tiled flooring or walls, changing the grout color is an easy way to give the space a whole new feel. For example, you may want to change white or ivory grout to a darker gray. Removing the old grout is necessary to apply new grout in a different color.
Changing the grout color can modernize the space or create a whole new color scheme. Dark grout makes the tile stand out, while light grout blends in more. The options are endless for customizing the look.
To Repair Cracks or Damage
Over time, grout can start to crack or crumble, leaving empty joints between tiles that collect dirt and debris. This can lead to staining and make the area look unclean no matter how much you scrub. Taking out damaged grout allows you to start fresh with a new grout that looks uniform.
If the grout joints have gaps, pits, or uneven surfaces, bacteria and mold can gain a foothold. This is especially problematic in bathrooms and kitchens. Removing the damaged grout completely eliminates these issues and improves the appearance.
For a Deep Cleaning
Grout builds up dirt, grime, and soap scum over the years, which can make white or light-colored grout appear dingy no matter how much you scrub. Removing grout allows you to deep clean the tile and joints completely before replacing it with fresh, clean grout.
Even with regular cleaning, grout lines inevitably collect dirt over time. The pores in the grout absorb stains and become discolored. Taking out the grout provides the opportunity to clean and sanitize the tile and joints thoroughly before regrouting.
Materials Needed for Removing Grout
Removing old, hardened grout takes some patience and elbow grease. Having the right tools makes the process easier and more efficient:
Grout Saw
A grout saw has a sharp, pointed diamond blade designed to grind out old grout. It is the quickest way to remove grout from narrow joints. Look for one with variable speeds for control.
Grout Rake
For wider grout joints, a grout rake tool is ideal. It has a carbide tip that chisels out the grout effectively. Opt for a rake with a swivel head to get into corners.
Grout Sponge
A grout sponge helps scrub away remaining grout residue. It has an abrasive surface safe to use on porcelain tile. Rinse it frequently to prevent circulating dirt.
Grout Sealant
Once the old grout is removed, apply a grout sealant to the clean joints before adding new grout. This provides a protective barrier and keeps the grout from staining. Use a water-based sealant recommended for porcelain tile.
Safety Gear
Be sure to wear safety goggles to protect your eyes from flying debris, as well as a dust mask to avoid inhaling grout dust. Knee pads can also help when working on floors. Wear closed-toe shoes and gloves for hand protection.
Vacuum
Have a strong shop vacuum on hand to suck up all the grout dust and debris as you work. This contains the mess and allows you to periodically clean the area.
Drop Cloths
Cover any surfaces, furniture, or appliances around the perimeter with drop cloths or plastic sheeting. This contains the grout dust and debris.
Ventilation
Turn on exhaust fans or open windows to keep the air circulating while cutting out grout, which creates fine dust. Proper ventilation is important.
Tile Sealer
Once the old grout is removed and new grout applied, be sure to seal the porcelain tile to protect the surface and help prevent stains. Use a penetrating sealer specifically for porous porcelain tile.
Rags
Have some clean rags or lint-free cloths handy to wipe up residual dust and liquid sealers as needed. Microfiber cloths work well.
Preparing to Remove Grout
Before starting the grout removal process, take some preparatory steps:
Clear the Area
Remove any furniture, rugs, or other items from the tiled space. This includes any bath or kitchen items that may be stored on open shelves. Take down curtains or window treatments that could collect dust too.
Protect Surfaces
Cover any surfaces around the perimeter with drop cloths. This contains the grout dust and debris. Use plastic sheeting underneath to protect wood or laminate floors from damage. Tape down the edges.
Have Proper Ventilation
Turn on exhaust fans or open windows to keep the air circulating while cutting out grout, which creates fine dust. Wearing a mask is important, but ventilation helps keep air quality safe.
Shut Off Power and Water
If removing grout near electrical outlets, be sure to shut off power to avoid any risk. In kitchens and baths, turn off the water supply behind sinks or other fixtures.
Create Access
Make sure you can easily access the tiled area. For high walls, use scaffolding or a sturdy ladder. Removing overhead grout safely requires being able to reach the area comfortably.
Removing Grout from Porcelain Tile
Once you have gathered the necessary tools and prepared the space, follow these steps:
Use a Grout Saw to Remove Narrow Grout Lines
For grout lines 1⁄8 inch or thinner, a grout saw is the quickest method.
- Hold the saw at a 45-degree angle to the joint and carefully insert the blade into the grout line.
- Slowly guide the blade along the joint, using light pressure to grind out and cut away the grout.
- Work in short 3-4 inch sections to avoid damaging the porcelain. Stop frequently to vacuum up debris.
- Move methodically outward from a corner joint for best access. Reach tricky spots by turning the saw sideways.
- Let the tool do the work. Don’t force or twist the blade or you may chip tile edges.
Use a Grout Rake for Wider Grout Lines
If the joints are wider than 1⁄8 inch, a grout rake is better suited to remove the hardened grout:
- Hold the rake perpendicular to the joint and place the carbide tip against the grout line.
- Apply firm but controlled pressure and use a rocking, sweeping motion to rake out and chisel away the grout.
- Take care not to damage the edges of the porcelain tile. Stop to vacuum out debris.
- Use the corner edge of the rake to get into the joint, then sweep sideways to scrape out the grout.
- On wall grout, work from top to bottom so debris falls away from clean areas.
Clean Up Remaining Grout Residue
Once the bulk of the grout is removed with the saw and rake tools, use the grout sponge to scrub away any remaining film or residue from the tile and joints.
- Wet the abrasive side of the sponge and wring it out so it is damp but not stopping.
- Rub the sponge over the tile in circular motions, rinsing it out frequently.
- Buff until all grout residue is removed from the tile surface and there is a clean joint between tiles.
- Take care on polished porcelain, which can show light scratches. Use minimal pressure.
- Change rinse water often to prevent circulating dirt. A clean sponge gives the best results.
Apply Grout Sealant
Before regrouting, treat the clean joints with a penetrating grout sealant:
- Apply the sealant with a small paintbrush, working it into the joint.
- Allow it to sit for 5-10 minutes.
- Wipe away any excess with a clean lint-free cloth.
This provides a protective barrier to prevent staining of the new grout.
Rinse Tiles and Let Dry
Give the tile one final rinse with clean water and a sponge to remove any remaining debris. Allow the tile to dry completely before regrouting, leaving fans running if indoors.
Tips for Success
Removing grout takes time and effort. Keep these tips in mind:
Work Slowly and Carefully
Rushing can lead to damaging the tile. Take your time and be cautious with tools. Don’t apply excessive force in your effort to remove grout.
Wear Safety Gear
Use goggles, mask, knee pads, and gloves to protect yourself through the dusty process. Long sleeves and pants help minimize skin exposure.
Have a Tile Nipper on Hand
A nipper tool can help pry out any stubborn grout pieces the other tools miss. Take care not to chip tile edges.
Minimize Grout Lines
When regrouting, consider using the smallest grout joint recommended for your type of tile. Thinner grout lines are easier to keep clean.
Use Contrasting Grout
Choose a contrasting grout color to make remaining dirt and stains less visible. Stay away from pure white, which shows every mark.
Seal New Grout Afterwards
Once your new grout is applied and wiped clean, be sure to seal it to maximize longevity. Also seal the tiles themselves for added protection.
Bottom Line
Removing old grout from porcelain tile can be labor intensive, but is worthwhile to refresh the look of your tiled surface. With the proper tools and techniques, you can chisel out that old grout and achieve clean, uniform joints for regrouting. Take safety precautions against the dust, and your efforts will be rewarded with beautiful grout lines that look like new.
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