How to Put Grout on Backsplash – A Step-by-Step Guide

Installing a beautiful tile backsplash can add style and value to any kitchen. However, the grouting process is key to making your backsplash look polished and complete. Properly applying grout takes patience and care, but with the right techniques, tools, and materials, you can achieve stunning results. This comprehensive guide will walk you through each step of grouting a backsplash, from preparing the surface to sealing the finished product. With the right know-how, you can create a flawless grouted backsplash that will stand the test of time.

Selecting Grout for Your Backsplash

Choosing the right grout for your backsplash tiles is one of the most important decisions you’ll make. The color and texture of the grout dramatically affects the overall look. Consider the following when selecting grout:


Select a grout color that matches or complements the tile color. For light colored tiles, use white or off-white grout. For darker tiles, use a darker grout color. Contrasting grout can add interest, but be sure the colors complement each other.


Grout comes in different textures – smooth or sanded. Sanded grout contains fine sand particles and is ideal for gaps larger than 1/8 inch. It provides a textured, casual look. Smooth grout has a polished appearance and works well for narrow grout lines under 1/8 inch.


Epoxy grout provides stain and water resistance. It’s a great choice for the kitchen, where spills are common. Standard cement grout is susceptible to staining. Use a grout sealer to protect porous grout.

Take your time selecting the ideal grout. The right choice can make your backsplash look crisp, clean, and cohesive.

What You’ll Need

Grouting requires some specialized tools and supplies. Gather the following before starting:

  • Grout – Use sanded grout for joints larger than 1/8 inch. For smaller joints, use unsanded grout.
  • Grout float – A flat trowel with a soft rubber edge for smoothing grout.
  • Grout bucket – For mixing grout. Get a bucket with a rubber bottom to prevent slipping.
  • Grout sponge – A porous sponge for wiping excess grout off tile.
  • Grout sealer – Seal the grout to protect it from stains.
  • Clean water – For mixing grout and cleaning. Use cool water when mixing.
  • Mixing stick – For stirring up grout mixture. Use a sturdy wooden dowel.
  • Old toothbrush or scrub brush – For cleaning grout residue.
  • Rags – For wiping up any messes or spills.
  • Painter’s tape – For protecting surfaces around the backsplash.
  • Drop cloth – For covering countertops.

Gather everything in advance so you’re not missing any supplies mid-project. Check that you have enough grout according to the manufacturer’s coverage guidelines.

Step 1 – Prepare the Backsplash for Grouting

Proper prep is crucial for achieving clean grout lines. Here’s how to get your backsplash ready for grouting:

  • Wait the recommended time after tile installation before grouting. This allows the thinset mortar to fully cure and prevents the grout from sinking. Check the thinset packaging.
  • Remove any spacers or clips between the tiles. Use a utility knife to carefully cut any that won’t pull out cleanly.
  • Inspect for any cracks, gaps, or low spots in the tilework. Fill any holes with thinset and allow it to fully cure before grouting.
  • Use painter’s tape to mask off any surfaces you want to protect, like the countertop or walls. Prevent grout from staining surfaces.
  • Cover the countertops with a drop cloth. This catches any spilled grout so it doesn’t stain the counters.
  • Dampen the tiles lightly with a sponge just before grouting. This prevents the tiles from absorbing moisture too rapidly from the grout.

Taking these preparatory steps will provide the smooth, clean foundation needed for flawless grout application.

Step 2 – Mix the Grout

Mixing the grout to the right consistency is key for easy spreading and clean grout lines. Follow these tips:

  • Read the packaging directions. Don’t add too much or too little water. Stick to the manufacturer’s recommended ratio.
  • In the bucket, pour in the grout powder first, then slowly add cool, clean water.
  • Mix the grout thoroughly using a wooden dowel or an electric drill mixer. Blend until it achieves a smooth, lump-free consistency.
  • Allow the mixed grout to sit or “slake” for 5-10 minutes, then remix before using. This allows the grout to fully absorb the water.
  • Don’t mix too much grout at once. Grout hardens quickly, so mix smaller batches that can be used within 30 minutes.
  • If the grout begins to stiffen early, briefly remix without adding water. Only add more water if absolutely necessary to regain workability.

Mixing high-quality grout properly ensures it will glide smoothly into the joints and set up correctly. Don’t rush this step.

Step 3 – Apply the Grout

Applying grout takes some practice to master. Use these techniques for a flawless finish:

Scoop and Pack

  • Use the grout float to scoop up grout at a 45-degree angle and pack it firmly into the joints, pressing diagonally to fill any gaps and ensure adhesion.
  • Check that joints are completely filled. Look for low spots and fill them.
  • Remove any excess grout sitting on tile surfaces with the edge of the float. Grout only belongs in the joints.

Wash Diagonally

  • Holding the float at a 45-degree angle, use a diagonal, scooping motion to smooth and shape the grout joints. Work in the same direction to prevent pulling grout out.
  • Use only light pressure. Excessive pressure can pull out grout or crack tiles.
  • Smooth down any high spots to make the grout flush with the tile edges.

Clean and Shape Edge Lines

  • Use the narrow edge of the float to shape and define the grout lines around the tile edges. Remove any haze or film.
  • Check for consistent grout lines. Joints should look smooth and uniform, not jagged or uneven.

Applying grout takes practice to prevent pulling it out of joints. Work methodically and cleanly for best results.

Step 4 – Clean Excess Grout Off Tile

Once the grout joints are smoothed and shaped, the next step is cleaning the tile surface. Follow these guidelines:

  • Allow the grout to firm up slightly in the joints, usually 10-20 minutes. Test a small area to ensure grout is ready for cleaning.
  • Use a damp grout sponge in a circular motion to loosen and clean off residual grout. Rinse the sponge frequently.
  • Clean diagonally across tiles to avoid pulling grout out of joints. Don’t press too hard.
  • Rinse the sponge until water runs clear. Remaining grout film can stain tiles.
  • Check for a smooth, consistent grout joint. Repair any low spots with additional grout before it fully hardens.

Thorough cleaning removes the grout haze and leaves a clean surface ready for sealing. Be patient and methodical during this important step.

Step 5 – Finish and Shape Joints

The final step is finish shaping and smoothing the grout joints:

  • Let the grout continue curing 10-20 minutes until firm. Test a small area first to ensure grout is ready for finish shaping, but still pliable.
  • Use the narrow edge of the grout float to shape joints and refine edges along tile perimeters. Remove any remaining haze.
  • Check for consistent grout line thickness. Joints should look uniform and straight.
  • Use a damp sponge lightly along joints to clean any remaining haze and create a smooth finish.
  • Once grout in joints becomes too firm to shape, stop. Don’t overwork it once hardened.

With careful shaping and smoothing, the grout joints should look crisp, clean, and professional. Consistent grout line thickness gives a polished finish.

Step 6 – Final Cleanup and Sealing

The final steps complete your grouted backsplash project:

Final Cleaning

  • Once grout is fully cured, usually 24-48 hours, do a final cleaning to remove any remaining haze or residue.
  • Mix a mild solution of vinegar and water and wipe down the entire surface with a soft cloth. Rinse thoroughly.
  • For stubborn haze or film, use a nylon brush or toothbrush along with the vinegar solution. Avoid abrasives.
  • Dry the surface completely with a lint-free towel. Ensure no moisture remains before sealing.

Thorough cleaning removes the last traces of grout film for a spotless finish.

Sealing the Grout

  • Read the instructions on your grout sealer product. Apply the recommended coats, allowing drying time between coats.
  • Use an applicator sponge or paintbrush to apply a thin, even sealer coat over all grout joints. Avoid puddling.
  • Check that the sealer penetrates fully into the grout. Multiple thin coats work better than one thick coat.
  • Avoid walking on the sealed surface for several hours. Allow it to cure completely.

Sealing is crucial to prevent staining and damage to porous grout over time. It adds a protective barrier and keeps your backsplash looking freshly grouted.

With proper sealing, your newly grouted backsplash will stay beautiful and easy to maintain for years of worry-free enjoyment!

Grout Troubleshooting Guide

Grouting inevitable involves some mess and mishaps. Here are some common problems and how to remedy them:

Issue: Grout crumbles or falls out of joints.

Solution: Wait longer after tile installation to apply grout. Ensure thinset mortar is fully cured first.

Issue: Grout appears cracked after drying.

Solution: Don’t allow grout to dry too quickly. Mist joints lightly with water. Ensure mixing ratio isn’t too wet.

Issue: Grout lines look uneven or varied in thickness.

Solution: Carefully shape joints when grouting for consistent thickness. Remove any excess grout on tile surface.

Issue: Grout whitish film or haze won’t clean off tiles.

Solution: Mix equal parts water and vinegar and scrub with a soft brush. Use grout haze remover product.

Issue: Grout joints seem to be sinking and cracking.

Solution: Don’t apply grout in a thick layer. Fill joints fully but don’t overfill.

Troubleshooting grouting issues takes some trial and error. With practice, your technique will improve each time.

Frequently Asked Questions About Grouting Backsplash Tiles

New to grouting? Here are answers to some common questions:

How long after tiling should I grout?

Wait at least 24 hours, or as recommended by the thinset packaging. Grout can sink or crack if applied to unset mortar.

What consistency should grout be when mixed?

Aim for a smooth, peanut butter-like texture. Grout shouldn’t be too wet or dry when mixing.

How do I apply grout smoothly into joints?

Use a rubber grout float and a scooping, packing motion at a 45-degree angle to fill joints. Wipe off excess.

How soon can I grout again after application?

Wait a minimum of 24-48 hours for grout to fully cure before additional coats. Exact timing depends on climate and thickness.

How do I clean stubborn grout haze off tile?

Make a solution with one part vinegar to one part water. Gently scrub with a soft brush and rinse thoroughly.

When is it safe to walk on my newly grouted backsplash?

Wait at least 24 hours for grout to cure fully. Avoid heavy cleaning for a few days. Use cardboard to walk during sealing.

How often should I seal my grouted backsplash?

Seal grout once a year. More frequent sealing is needed for showers or kitchen backsplashes prone to moisture and staining.

Don’t be afraid to grout your own backsplash. With the right tools and techniques, you can achieve beautiful results and improve your tile’s appearance.

Tips for Achieving a Flawless Backsplash Grout Project

Grouting adds the finishing touch to your backsplash. Follow these pro tips for stunning results:

  • Take your time mixing and applying grout. Don’t rush through steps.
  • Ensure joints are completely packed to prevent pits and cracks as grout dries.
  • When smoothing grout, wipe diagonally across tiles to avoid pulling grout out of joints.
  • Shape joints carefully on the final pass for crisp, clean lines. Wait for grout to firm up but still be flexible.
  • During cleanup, change rinse water frequently to remove all grout residue that can form a film.
  • Check for consistency in joint thickness and appearance. Careful technique prevents uneven or sloppy lines.
  • Allow ample drying time between steps. Grout can crack if additional coats are applied too soon.
  • Seal grout to maximize stain resistance and longevity, especially in kitchens. Reseal every year or as needed.
  • If grouting issues occur, wait 72 hours before attempting repairs for proper adhesion.

With the right prep, products, and techniques, you can achieve picture-perfect grouted backsplash that looks professionally done.

Achieving Special Grout Effects

Beyond basic grouting, there are creative possibilities too. Consider these special grouting techniques:

Contrasting Grout Colors

Select a grout color that contrasts with your tiles instead of blends. Black grout paired with white marble adds drama. Dark grout can emphasize light tile colors.

Metallic Grout

Special grout contains metallic elements like copper, nickel, or bronze that create a glimmering effect. This works well with glass or stone tile.

Dazzling White Grout

Opt for bright white grout and pair it with darker tiles for a pop of contrast. Keep the joints narrow for a striking graphic look.

Colored Grout

Grout comes in many colors from soft grays to bold reds. Consider a vivid grout with colorful mosaic tiles. Ensure colors complement each other.

Hazed Grout Look

Create a “misty” look by leaving some grout haze in crevices after cleaning for an antique feel. Sealing is crucial.

Get creative with your grout color and technique to complement your tile and achieve your desired style, whether boldly contemporary or classically elegant. The possibilities are endless!

Grout Maintenance Tips

Once your backsplash grout is complete, proper ongoing care will keep it looking fresh and clean:

  • Use a gentle grout brush and mild cleaner when scrubbing dirt. Avoid acidic cleaners which degrade grout over time.
  • Reseal grout every 1-2 years with a penetrating sealer. Resealing maintains stain resistance and protects grout.
  • Address any cracks in grout right away before moisture seeps in and leads to bigger issues. Grout repair caulk fills cracks.
  • To revitalize discolored or dirty grout, use an oxygen bleach cleaner and stiff nylon brush. Rinse thoroughly.
  • Check regularly for signs of damage or wear. Grout should not crumble, flake or easily scratch.
  • Moisture is grout’s enemy. Fix any leaks near your backsplash and wipe up spills quickly.

Proper grout care enhances your backsplash’s durability and keeps it looking its best for many years. Take time to seal and clean it routinely.

When to Regrout a Backsplash

With proper maintenance, quality grout can last 5-10 years or longer before needing replacement. Here are signs it’s time to regrout:

  • Grout is cracking or crumbling in multiple areas. If local repairs aren’t effective, a full regrout may be needed.
  • Joints are no longer flush with the tile. Sunken or uneven grout indicates a failing bond.
  • Grout is heavily stained despite attempts at deep cleaning. Severely discolored grout usually must be replaced.
  • Grout shows signs of mold or mildew that cannot be removed by cleaning.
  • Existing grout was poorly applied and now has inconsistent joint thickness or an amateur appearance.

Regrouting restores the clean finish and seals out moisture. It can update the color and refresh the whole look of your backsplash. With some effort, you can revitalize worn grout.

Grout Removal Tips When Replacing Grout

If your backsplash grout needs replacing, the old grout must be fully removed from joints for proper application of new grout. Here’s how:

  • Use an oscillating tool or rotary grout removal tool along joints to rake out old grout. Take care not to scratch tiles.
  • For thicker grout, cut it out carefully with a utility knife. Multiple passes may be needed to fully remove it.
  • Once the bulk is removed, scrub joints with a stiff grout brush to get down to the bottom and sides of the joints.
  • Vinegar mixed with water can help soften and dissolve remaining grout residue. Use a toothbrush for tight corners.
  • Don’t widen joints by removing thinset mortar below grout level. The integrity of the tile depends on mortar adhesion.
  • Vacuum out all joint debris. Ensure joints are clean before regrouting.

Removing all traces of old grout takes elbow grease but allows for successful results when regrouting. Take time to thoroughly clean joints.

Grout Color Considerations When Replacing Grout

When regrouting, consider selecting a fresh new grout color:

  • Match the existing grout color if you want a uniform look