How to Regrout at Home: A DIY Guide

Written By groutdoctor .

What Is Grout Repair (Regrouting) and Why Should You Do It?

Tiles can last a lifetime—but grout? Not so much. Over time, the grout between your tiles can become cracked, stained, or start crumbling away. That’s where grout repair, or regrouting, comes in. But what exactly is regrouting, and why should you care?

Let’s break it down.


DIY Regrouting Guide A Practical Step-by-Step Process for Cleaner, Better Tiles

If your tile grout is cracked, stained, or moldy, regrouting can dramatically improve its appearance and longevity. While it might seem like a professional task, it’s completely doable on your own with the right tools, a little time, and attention to detail. This guide will walk you through each stage of the regrouting process—from preparation to sealing—with clarity and confidence.



What You’ll Need

  • Grout removal tool (multi-tool or manual grout saw)

  • Vacuum or dust brush

  • Drop sheets or old towels

  • New grout (pre-mixed or powdered)

  • Grout float

  • Mixing bucket and stick (if using powdered grout)

  • Masking tape

  • Clean sponge

  • Paper towels or rags

  • Silicone sealant and applicator gun

  • Silicone remover or utility blade



Step 1: Preparation

  • Begin by taking a reference photo of the tiled area. This can help later if needed.

  • Remove any personal items, fixtures, or loose furniture near the work zone.

  • Lay down drop sheets or old towels to protect adjacent surfaces.

  • Remove existing silicone along edges and corners using a utility blade or silicone remover.

  • Use a vacuum or soft brush to clear away any dust or loose debris from the grout lines and tile surface.



Step 2: Remove Old Grout

  • Using a multi-tool or grout saw, carefully grind or scrape out the old grout between the tiles.

  • Work slowly to avoid scratching the tile surface. Use light pressure, especially around corners and edges.

  • Ensure grout lines are at least 4–5mm deep and thoroughly cleared of dust or fragments.

  • Vacuum the area thoroughly to remove all residual dust.



Step 3: Clean and Mask

  • Wipe the tile surface with a damp cloth or sponge to remove any remaining dust.

  • Allow the area to dry completely before proceeding.

  • Apply masking tape to areas where you do not want grout or sealant to spread, such as walls or fixtures.



Step 4: Mix the Grout

  • If using powdered grout, mix it in a clean bucket using water per manufacturer’s instructions.

  • Stir thoroughly until you achieve a consistency similar to thick yogurt or melted ice cream.

  • Let it sit for a few minutes, then mix again before use.



Step 5: Apply the Grout

  • Start from the farthest corner of the space and work your way out.

  • Use a grout float to press grout firmly into the gaps between the tiles.

  • Apply at a 45-degree angle to the lines to ensure full coverage.

  • First pass: focus on filling all joints generously.

  • Second pass: hold the float diagonally to scrape off excess grout.

  • Let the grout begin to set for about 15 minutes.

  • Third pass: scrape again lightly to remove further excess. A thin grout haze will remain on the tiles.



Step 6: Clean Off Grout Haze

  • After waiting 30 minutes, wipe the tile surface gently using a damp (not soaking) sponge.

  • Avoid wiping directly over the grout lines at this stage.

  • Wait another 30 minutes, then repeat the sponge process, this time wiping over both tiles and grout lines.

  • Buff the surface dry with a clean rag or paper towel.



Step 7: Apply Silicone Sealant

  • Carefully remove any masking tape.

  • Apply a fresh bead of silicone to tile joins, corners, and edges using a silicone gun.

  • Smooth the bead using a finger or shaping tool.

  • Remove any remaining tape immediately after smoothing the sealant.



Step 8: Final Clean and Pack Down

  • Vacuum and wipe all surfaces one last time to remove dust and residue.

  • Replace any furniture, fixtures, or personal items you removed earlier.

  • Rinse your tools and bucket thoroughly so they’re ready for the next project.



Your Tiles, Renewed By following this guide, you’ll achieve a clean, polished finish that revives your tiled surfaces without the expense of retiling. With a bit of effort and care, your bathroom, kitchen, or laundry will look like new—and stay that way longer.

For a printable PDF version, see below.



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