How to Re-Grout Your Kitchen Backsplash

Re-grouting a kitchen backsplash can completely transform the look of your kitchen by making old, stained, or cracked grout look brand new. With some time and effort, you can breathe new life into your backsplash and make it look like it was just installed. Here is a step-by-step guide on how to properly re-grout a kitchen backsplash.

What You’ll Need

Before starting any re-grouting project, make sure you have all the necessary supplies and tools on hand:

  • Grout removal tool – This handy tool has a carbide tip that can easily scrape out old grout.
  • Grout saw – For really stubborn grout, a grout saw can cut through and remove it.
  • Hammer and chisel – Useful for chipping away old grout in corners or tight areas.
  • Grout float – Shaped like a large trowel, this helps apply grout smoothly.
  • Grout sponge – After applying new grout, use this sponge to wipe down the tiles.
  • Grout sealer – Sealing the new grout prevents staining and damage.
  • Tile cleaner – Use an alkaline-based cleaner specifically for tile.
  • Grout – Make sure to get a grout that matches the existing shade.
  • Bucket for mixing grout
  • Rags, paper towels, plastic sheets – For cleaning up.

Prep the Surface

Before applying any new grout, you need to completely remove all the old grout first. Here’s how:

Clean the Tiles

Use your tile cleaning solution and scrub every inch of the backsplash tiles to remove any dirt, oils, or soap scum. Rinse thoroughly.

Remove Existing Grout

Use your grout removal tool, grout saw, hammer and chisel to scrape, saw, and chip out all the old grout, right down to the bottom between the tile and countertop. Be careful not to scratch or damage the tiles.

Vacuum up all the grout pieces and debris as you work. Completely removing the grout may take some time and effort, but it’s crucial for proper adhesion of new grout.

Wash Tiles Again

Give all the exposed tile edges and grout lines a second washing with tile cleaner to get rid of any remaining debris. Rinse and let dry completely.

Mix and Apply New Grout

Now you’re ready for the fun part – adding the fresh new grout!

Mix the Grout

Combine grout powder with water in a bucket, following the package directions. The consistency should be thick but still spreadable. Let the mixture slake for 5-10 minutes.

Apply Grout

Use your grout float held at a 45° angle to pack grout deeply into the grout lines. Push it down firmly.

Completely fill all grout lines, leaving no gaps or voids. Go slowly and take your time for best results.

Wipe Away Excess Grout

Once applied, take your damp grout sponge and wipe diagonally across the tiles to remove excess grout and smooth the lines. Rinse the sponge frequently.

Repeat the process until all excess grout is removed and all grout lines look uniform.

Final Clean Up

Use a barely-damp rag to polish the tiles and finish smoothing the grout lines. Allow the grout to fully cure according to the package directions.

Seal the Grout

This last crucial step prevents stains and damage by creating a protective barrier.

Carefully apply the grout sealer using the applicator sponge or brush. Allow to dry completely. Apply a second coat for maximum protection.

And that’s it – your backsplash looks brand new again! Properly maintaining re-grouted areas will keep your kitchen looking amazing for years to come. Let us know if you have any other how to re-grout kitchen backsplash questions!

Frequently Asked Questions About Re-Grouting a Kitchen Backsplash

How long does re-grouting a backsplash take?

Plan on re-grouting taking 2-3 hours for an average-sized backsplash of 30-50 square feet. Removing all the old grout takes the most time. The actual regrouting goes quicker.

Does all the old grout need to be removed?

Yes, it’s critical to remove 100% of the old grout to ensure proper adhesion of new grout. Any grout left in place can result in cracks or weak spots.

What’s the best grout to use on a backsplash?

An unsanded caulk-style grout works well for the narrow grout lines in backsplashes. Make sure to match the color of your existing grout.

Should I seal old grout or new grout?

Sealing is recommended for all grout, old and new, to prevent staining. Re-seal grout every 1-2 years.

How soon can I get the backsplash wet after regrouting?

Avoid getting the regrouted area wet for at least 72 hours to allow adequate curing time.

Why does my new grout look cracked after it dries?

This happens if too much water was used in mixing or if grout was spread unevenly. Regrouting may be needed.

What’s the easiest way to remove old grout?

A carbide-tipped grout removal tool is the quickest and easiest way to scrape out old grout completely.


Re-grouting a kitchen backsplash and making it look fresh and clean again is a very doable DIY project. With some elbow grease and attention to detail, you can completely transform the look of your kitchen. Just be sure to take the time to remove all old grout, apply new grout properly, and seal it to get years of beauty from your backsplash. Let us know if you have any other how to re-grout kitchen backsplash questions!