How to Clean Grout Haze From Marble

The haze that appears on marble after grouting is an expected occurrence.

Preparation

It is the result of the grouting process and is best dealt with immediately for two reasons. First, the initial grout cleaning is what will define the appearance of the seams. The desired look is a consistent depth and width, which also serves to strengthen the joint between the marble tiles. Second, if allowed to cure too long after initial application, it will be difficult to get a consistent depth and width, and removing the haze will be more difficult and time-consuming.

Step 1

Fill both buckets about three-quarters full with clean, potable and room-temperature water.

Step 2

Place one grout sponge in each bucket and allow to soak for three to five minutes.

Step 3

Lay a protective drop cloth over any surfaces that you do not wish to be discolored, moistened or soiled.

Step 4

Designate one bucket for rinsing and the other for cleaning.

Grout Haze Removal

Step 1

Wring out the cleaning water sponge, leaving about one-third of the water in the sponge. Gently wipe down the affected area at 45-degree angles to the grout seams. Regularly remoisten the sponge by wringing it out in the cleaning bucket until the entire surface has been moistened.

Step 2

Allow the surface to dry for two to three minutes and repeat Step 1 using the cleaning bucket. Repeat this process until only a slight grout haze remains.

Step 3

Now allow the grout and marble to dry for 15 to 30 minutes. This will prevent the grout in the seams from becoming too wet, resulting in undesirable complications (See tips section).

Step 4

Wring out the final rinse sponge, leaving about one-third of the water in the sponge. Gently wipe down the affected area at 45-degree angles to the grout seams. Regularly remoisten the sponge by wringing it out in the final rinse bucket until the entire surface has been moistened.

Step 5

Allow the surface to dry for two to three minutes and repeat Step 4 using the final rinse bucket. Repeat this process until no signs of grout haze remain.

Things You Will Need

  • 2 grout sponges
  • 2 five-gallon buckets
  • Safety glasses
  • Latex rubber gloves

Tips

  • - Depending on the temperature and humidity in the area being cleaned, it may be necessary to allow more time for drying. The area is considered dry and ready for more cleaning when the marble surface is dry and the grout seam starts to lighten in color.
  • - It is critical that the grout seams do not get overly moistened as this could lead to weakening and dry-cracking, as well as the removal of material from the seam by the grout sponge.
  • - When wringing out the sponges, it is best to submerse them in the water, wring them out, and repeat again before use on the marble. This removes as much grout from the sponge as possible.
  • - For extremely difficult areas, it may be necessary to use a chemical cleaner with an acidic base (See Reference 1). Only try this as a last resort.

Warnings

  • - Wear safety glasses at all times when cleaning grout haze.
  • - Wear latex rubber gloves when coming in contact with grout sponges and the cleaning and rinsing water.