How to Put Grout on Tile Backsplash

Grout is an important material when installing tile. It fills the spaces between tiles, sealing the installation and giving a finished look. When grouting a backsplash, proper technique is important to get smooth, uniform grout lines that enhance the beauty of the tile. Here is a step-by-step guide on how to properly grout a tile backsplash.

Gather Your Materials

Before starting to grout, make sure you have all the necessary materials on hand:

  • Grout – Use sanded grout for joints wider than 1/8 inch and unsanded grout for thinner joints. Make sure to use a grout color that matches or complements the tile.
  • Grout float – A grout float has a soft rubber edge for smoothing grout.
  • Grout sealer – Sealing the grout prevents staining and makes it easier to clean. Choose a water-based sealer.
  • Sponges – Have several clean sponges for wiping up excess grout.
  • Bucket for mixing grout
  • Grout haze remover (optional)

Prepare the Tile Surface

Before grouting, ensure the tile surface is clean and that all adhesive has cured according to manufacturer’s directions. Remove any spacer clips or tiles spacers between the tiles. Vacuum or wipe down the tile to remove dust or debris. Pre-seal porous tile if necessary to prevent staining.

Mix the Grout

Mix the grout according to package directions. Do not mix too much at one time, as grout can harden quickly. The consistency should be thick but still able to flow easily into the joints.

Apply the Grout

Use the rubber grout float to spread grout diagonally across the tile, pushing the grout into the joints. Apply even pressure and fill all joints fully.

Clean Excess Grout

Once all joints are filled, hold the float at a 90° angle and scrape diagonally across the tile surface to remove excess grout and smooth the joints. Sponge the tiles lightly with a damp sponge to remove any remaining film or grout haze. Rinse the sponge frequently.

Let the Grout Dry

Allow the grout to become firm, usually about 15-30 minutes. Using a damp sponge, lightly wipe diagonally across tiles to clean any remaining haze. Buff dry with a towel. Do not overwash the grout joints.

Seal the Grout

Once grout has cured fully, apply grout sealer according to manufacturer’s directions. This will protect the grout from stains.

Curing Time

Allow the grout to cure for at least 72 hours before cleaning with harsh cleaners or exposing to water. Grout reaches full cure in 28 days.

Grout Maintenance

Seal grout annually. Clean grout regularly with apH-neutral cleaner and rinse thoroughly with water. Re-apply grout sealer if grout appears porous or stained.

Tips for Grout Success

  • Work in small sections no larger than 4 square feet at a time
  • Hold float at a consistent 45° angle when applying grout
  • Work grout thoroughly into corners and edges
  • Minimize wiping and over-cleaning grout joints
  • Allow proper drying time between steps
  • Use masking tape to protect walls and surfaces

Following proper technique when grouting a backsplash will lead to a flawless finished product. Taking your time and grouting in sections allows you to thoroughly work the grout into the tile joints for a seamless appearance. With the right materials and proper care, your new backsplash will look amazing for years to come.

Frequently Asked Questions About Grouting Tile Backsplash

What type of grout should I use for a backsplash?

For backsplash installations, unsanded grout is the best choice for joints 1/8 inch and narrower. It provides a smooth finish. Use sanded grout for wider grout lines.

How soon can I grout after installing backsplash tile?

It’s best to wait 24-48 hours after installing tile to allow the adhesive to cure before applying grout. Check manufacturer’s directions.

Do I need to seal grout on a backsplash?

Yes, using a grout sealer is highly recommended to protect grout from stains and make cleaning easier. Apply sealer once grout has fully cured.

Should I grout all the way to the countertop edge?

It’s best to leave a slight gap (1/8 inch) between the backsplash and countertop and caulk that joint instead of grouting. This allows for normal expansion and contraction.

What’s the easiest way to apply grout on a backsplash?

Using a rubber grout float makes applying grout smooth and effortless. Hold the float at a consistent 45° angle and work in small sections for best results.

How soon can I get the grout wet after grouting?

Avoid exposing grout to water for at least 72 hours. This allows proper curing time. Wait 28 days for full cure before heavy cleaning.

Why is my grout cracking/crumbling?

This usually occurs due to inadequate drying time between steps or overall insufficient curing. Allow at least 24-48 hours curing before light use.

How do I get the grout lines straight and consistent?

Carefully packing the grout into the joints and holding the float at the same angle provides straight, uniform grout lines. Take your time.

How do I clean grout haze off the tile surface?

Use a bare minimum of water and only light pressure when wiping up haze. Buff surface completely dry to prevent a film forming. Avoid over-washing.


Grouting adds a polished finish to any backsplash installation. By following the proper techniques, taking your time, and allowing for adequate drying, you can achieve durable, stained-resistant grout lines that enhance your tile layout. Pay attention to detail when packing the joints and wiping the surface clean. Sealing and protecting the finished grout will keep your backsplash looking pristine for years of beauty and easy maintenance. With the right materials and skills, you can install a flawless backsplash you can be proud to show off.