How to Regrout Kitchen Tile (Backsplash and Floor Guide)

Kitchen tile grout faces a unique combination of challenges: cooking grease, food spills, steam, and constant cleaning with various products all take a toll over time. When kitchen grout becomes permanently stained, cracked, or crumbling, regrouting is the most effective way to restore a clean, hygienic surface.

This guide covers how to regrout kitchen tile — whether it's your backsplash, countertop surround, or floor.

Signs Your Kitchen Grout Needs Replacing

• Grout is dark with embedded grease and won't clean up
• Grout is cracking or crumbling, especially near the stove or sink
• Grout has a persistent musty smell (sign of moisture and mold underneath)
• Grout is missing in sections near high-moisture areas
• You want to refresh the kitchen's look without replacing tiles

What You'll Need

• Grout Removal Tool
• Pre-Mixed Tile Grout
• Grout Float
• Vacuum and damp sponge
• Bucket of clean water
• Grout sealer
• Silicone caulk (for countertop-to-backsplash joint)

How to Regrout Kitchen Tile: Step-by-Step

Step 1: Clear and protect the work area.
Remove everything from the countertop. Cover appliances and the sink with plastic sheeting to protect them from grout dust and residue.

Step 2: Remove all old grout.
Use a grout removal tool to rake out all old grout from every joint. For backsplash tiles, work carefully to avoid scratching the tile surface. Remove grout to a depth of at least 2–3mm.

Step 3: Degrease the joints.
Kitchen grout joints often have embedded grease that must be removed before new grout will bond. Wipe the open joints with a degreasing cleaner and allow to dry completely. This step is especially important near the stove and sink.

Step 4: Vacuum and dry.
Vacuum all dust from the joints. Allow to dry fully — at least 2–4 hours.

Step 5: Apply new grout.
Load your grout float with pre-mixed tile grout and press it firmly into the joints at a 45-degree angle. Work in sections of 3–4 square feet. For backsplash tiles, work from the bottom up so excess grout doesn't drip onto freshly grouted sections below.

Step 6: Clean tile surfaces promptly.
Before the grout sets, wipe tile surfaces with a damp sponge to remove excess. Rinse the sponge frequently. Work quickly — grout sets faster in warm kitchen environments.

Step 7: Caulk the countertop-to-backsplash joint.
The joint where the backsplash meets the countertop should always be caulked, not grouted. This joint experiences movement as the countertop expands and contracts, and grout will always crack there. Use a waterproof silicone caulk that matches your grout color.

Step 8: Cure and seal.
Allow grout to cure for 24–48 hours before using the kitchen normally. Once fully cured (72 hours), apply a grout sealer — especially important in kitchens where grease and food spills are constant.

Kitchen-Specific Tips

• Choose a darker grout color for kitchen floors and countertop surrounds — it hides food stains and grease far better than white or light grey
• Degrease joints thoroughly before regrouting — grease prevents adhesion
• Always caulk the countertop-to-backsplash joint — never grout it
• Seal kitchen grout every 6–12 months to protect against grease penetration

Frequently Asked Questions

Can I regrout kitchen backsplash without removing tiles?
Yes — regrouting only removes and replaces the grout, not the tiles. As long as the tiles are firmly bonded, you don't need to remove them.

What grout is best for kitchen backsplash?
Unsanded grout works best for the narrow joints typical of backsplash tiles. For kitchen floors with wider joints, use sanded grout. Epoxy grout is the most stain-resistant option for kitchens.

How do I get grease out of grout before regrouting?
Apply a degreasing cleaner or dish soap to the open joints, scrub with a stiff brush, and rinse thoroughly. Allow to dry completely before applying new grout.

How long after regrouting can I use the kitchen?
You can use the kitchen normally after 24–48 hours, but avoid getting the new grout wet for at least 72 hours for full cure.