Return to the Bathrooms Forum | Post a Follow-Up

Gray grout is turning white

Posted by sparklebread (My Page) on
Fri, Jan 11, 13 at 22:10

Our bathroom floor was grouted Tuesday. This evening I noticed areas that appear to be turning white. Any idea what this is and the cause?

This is the second issue we had with the floor. The first time the tile was laid, the floor was not level. It was a complete tear out thanks to guidance I received on this forum. I really don't want to go to the contractor with this until I have a good understanding of what this is and a remedy if there is one. Grout used was mapei warm gray with grout boost. The shower was grouted (warm gray) a few weeks back and it does not appear to have this problem.

Follow-Up Postings:

RE: Gray grout is turning white

A couple possible causes could be either latex leaching or efflorescence. We experienced efflorescence - it's where the minerals in the subfloor below the tile rise through the grout and leave a white residue on the surface. Our grout turned orange in several spots from the iron, and still has sort of a white-ish residue.

RE: Gray grout is turning white

Thanks Pip! You are referring to the hex marble floors, correct? I love both your bathrooms and I know it probably drove you crazy when the grout stared to turn. Did you all try any remedies or just live with your grout discoloration?

RE: Gray grout is turning white

Yes, the efflorescence affected my marble hex floors in our shower. I read online that a mixture of vinegar and water can alleviate the problem, but I didn't try that on our marble. I took a toothbrush to it with some very hot water and scrubbed, and it's definitely better, but not completely gone. The orange stains worked themselves out after a few weeks, but the grout still shows some white spots you look closely at it.

RE: Gray grout is turning white

Just wanted to report back~ the installer believes this is thinset that has risen to the top of the grout. He is going to dig/cut out the thinset spots and regrout.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Bathrooms Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here