My daughter has a black polished granite shower both walls and floor. she had someone redo the grout in the shower and asked me to see why she was getting so much calicum around the grouting. I intended to remove the grout and regrout the floor only to find that the guy who was hired to regrout used silocone caulking rather than grout. I removed the silcone caulk only to find that the was a substantal accumulation of stale water under the floor. My guess is that this water was laced with mold as it had a terrible odor. I have removed the water from under the floor and dried out the floor (the floor under the granite is concrete so I am assuming that if things are dry the mold problem has been taken care of. Do you agree or is there a treatment of some sort say clorox to use to remediate the mold? also what do you reccomend I do to clean the granite to remove the scum and calcium deposits? sorry for being so long winded. My daughter also has a marble tiled shower. haow to i clean this marble and then olish and seal it once its clean? Thanks
Dear Dick:
You surprise me. Pleasently, that is! You're showing a lot more common sense than many "professionals" I know!... :-)
I would pour some mildew stain remover prouduct like MB-9 through the still opened grout lines and let it dry. After that you will grout using black latex caulk. (The idea of using caulk instead of grout was very good. What was not so good was trapping all that moisture in!...)
As for the cleaning part of the job, I would rely on a product like MB-3, a razor blade and lots of patience. Use the razor blade first, and then finish the job with MB-3. If at the end you will still have some lighter discoloration that "disappear" when wet, the application of a good-quality stone color enhancer like MB-6 should make it "disappear" permanently.
As for the cleaning of the marble shower stall, without actually seeing it I can't tell. Many times marble shower stalls require professional restoration of the surface of the tiles, and not even a proficient DIYer like you could even begin to do that.
Maybe, if you could send me a couple of pictures rendering the most critical areas of the stall, I could suppy you with better intelligence.