How to Regrout Your Kitchen Backsplash

Grout is the unsung hero of your kitchen backsplash, acting as the critical barrier that keeps grease, water, and food debris out of your wall assembly. Over time, that barrier cracks or discolors, turning a once-sharp kitchen feature into a stained eyesore that can harbor moisture behind your tile. Refreshing it is less about skill and more about patience. When done well, a fresh grout job restores the geometric crispness of your tile layout and gives the entire kitchen a facelift that looks like it cost thousands. Don't rush the removal, and don't skimp on the cleaning, or your new grout won't stick.

  1. Protect Everything First. Remove all items from your countertops and tape off the edges where the tile meets the countertop, cabinets, and appliances with painter's tape. Use drop cloths or heavy plastic to cover the surfaces below the backsplash to catch debris.
  2. Grind Out the Old. Use a grout removal tool or a oscillating multi-tool with a grout blade to carefully grind out the old grout. Aim to remove at least half the depth of the tile thickness to provide a solid anchor for the new material.
  3. Clear Dust Completely. Use a shop vacuum with a brush attachment to remove all dust and loose bits from the joints. Wipe down the entire backsplash with a damp sponge or a mixture of vinegar and water to ensure the surface is completely free of oils and debris.
  4. Press Grout Deep In. Take a rubber grout float and spread your pre-mixed grout over the tiles at a 45-degree angle. Press firmly to force the grout deep into the gaps, ensuring no air pockets remain.
  5. Wipe with Restraint. Wait for the grout to firm up slightly, usually 15 to 30 minutes, then use a damp—not wet—sponge to wipe away the excess grout from the tile faces. Rinse your sponge frequently to keep the surface clean.
  6. Dry Buff to Shine. Once the grout has dried to a dull haze, take a dry microfiber cloth and buff the tiles clean. Do not use water for this step, as you want to remove the remaining dust without re-wetting the joints.