How to Regrout Bathroom Tile (Floor and Wall Guide)

Bathroom tile grout is constantly exposed to moisture, cleaning products, and foot traffic — making it one of the first things to show wear in any home. When bathroom grout starts cracking, staining, or crumbling, regrouting is the most effective way to restore the look and waterproofing of your bathroom without a full renovation.

This guide covers how to regrout bathroom tile on both floors and walls.

When to Regrout Your Bathroom Tile

• Grout is cracking or crumbling in multiple areas
• Grout is permanently stained and won't respond to cleaning
• Mold keeps returning in the same spots despite treatment
• Grout is missing in sections, leaving tile edges exposed
• You want to update the look of the bathroom with a fresh grout color

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 corners)
• Safety glasses and knee pads

How to Regrout Bathroom Tile: Step-by-Step

Step 1: Prepare the bathroom.
Remove bath mats, toilet accessories, and anything else near the work area. Ensure good ventilation by opening a window or running the exhaust fan.

Step 2: Remove all old grout.
Use a grout removal tool to rake out all old grout from every joint. Work carefully on wall tiles to avoid slipping and scratching the tile surface. Remove grout to a depth of at least 2–3mm throughout.

Step 3: Vacuum and clean.
Vacuum all dust from the open joints. Wipe with a barely damp cloth and allow to dry completely — at least 2–4 hours, or overnight for best results.

Step 4: Check tiles for movement.
Press on each tile to check for hollow spots or looseness. Re-bond any loose tiles before grouting and allow adhesive to cure fully.

Step 5: Grout the walls first.
If you're regrouting both walls and floor, always start with the walls. Load your grout float with pre-mixed grout and press it firmly into the joints at a 45-degree angle. Work in sections of 3–4 square feet. Wipe excess off tile surfaces with a damp sponge before it sets.

Step 6: Grout the floor.
Move to the floor once the walls are done. Apply grout the same way, working in manageable sections. Keep your sponge damp and rinse it frequently.

Step 7: Caulk all corners and transitions.
Replace grout in all inside corners (where wall meets floor, where two walls meet) with flexible silicone caulk. These areas move with the building and grout will always crack there. Caulk stays flexible and waterproof.

Step 8: Final cleanup.
Once the grout has set for 24 hours, buff away any remaining grout haze from tile surfaces with a dry cloth.

Step 9: Seal the grout.
After 72 hours of curing, apply a grout sealer to all grouted surfaces. In a bathroom, this step is essential — it prevents moisture absorption, staining, and mold growth.

Bathroom Regrouting Tips

• Work from the top down — walls before floor — so drips don't land on freshly grouted surfaces
• Use unsanded grout for joints under 1/8 inch (typical for wall tiles), sanded grout for wider floor joints
• Keep the bathroom well-ventilated during and after grouting to speed up curing
• Don't use the bathroom for at least 48 hours after grouting

Frequently Asked Questions

How long does it take to regrout a bathroom?
A typical bathroom takes 1–2 days of work: half a day for grout removal, half a day for applying new grout, plus 48–72 hours of cure time before use.

Can I regrout over existing grout?
No — new grout won't bond to old grout and will fail quickly. All old grout must be removed first.

What's the best grout color for a bathroom?
Light grey is the most practical choice — it hides dirt better than white but looks cleaner than dark colors. For a classic look, white grout with white tiles is timeless but requires more maintenance.

Do I need to seal bathroom grout?
Yes, always — especially in wet areas. Unsealed grout absorbs moisture and develops mold and staining quickly. Reseal annually in high-use bathrooms.