The shower is used on a regular basis, which can cause grout to crack, chip, or stain after several years. In some showers, mildew or mold begins growing around or under the grout. These situations call for re-grouting, which is much easier than it sounds. This project requires just a few supplies and tools and an eye for detail.
You will need:
Step 1: Determine which kind of grout you need. If only one area of the shower needs re-grouting, break off a portion of the grout and find a color match at the store. If the whole shower must be re-grouted, choose a grout color to match the color of your shower tile. Go with sanded grout if the space between tiles is larger than 1/8-inch. The sand provides the grout with additional strength, holding it together within these larger gaps. Always choose non-shrinking grout.
Step 2: Use the regular sponge and grout cleaner to clean your existing grout. This removes all soap residue, grime, and mildew. Let the area dry before proceeding.
Step 3: Use the grout saw or chisel to loosen the cracked, crumbling, or damaged grout. Remove this with the chisel or small knife, being sure to get all loose pieces. Vacuum any remaining loose grout, including any pieces that are wedged into spaces between the tiles.
Step 4: Clean the shower tile with the grout cleaner and sponge an additional time.
Step 5: With the wet rag, dampen the grooves where you will be applying the new grout.
Step 6: Mix the new grout according to the manufacturer instructions.
Step 7: Use the grout float to apply grout to spaces between the shower tiles. Go back over the surface with a wet finger after you have finished, smoothing out each joint. If you find a low place, reapply more grout with the float and resmooth the area with your wet finger.
Step 8: Run a squeegee or a grout sponge over the work area, removing extra grout from each tile face. Take care not to wipe too hard or too many times because this could disturb the new grout. If you make a mistake, re-float additional grout and smooth affected joints.
Step 9: Adhere to the manufacturer instructions regarding grout drying time. Inspect the area and reapply grout to grooves that feature edge gaps. This step may not be necessary if you use non-shrinking grout.
Step 10: Once the work is complete and the grout has dried, apply the grout sealer. Allow this to dry and use a wet rag or sponge to wipe all residue from the tile faces. This will result in a haze. Let this dry and wipe the area with the dry rag.