Q. How can I remove paint drops marks from full body porcelain tiles? It is oil base and water base paint. A. Methods for removing paint marks from full-body porcelain tiles depend on the type of paint and how long it has been there. For water-based... Read More

Q. I installed Lasa White marble on my floor, and after about 15 days, yellow stains appeared across the entire surface. I used a stain remover, and the stains were removed, but they returned after two days. Please advise what I should do. A. The... Read More

Q. We just finished the installation of our walkway with bluestone 4 weeks ago. However, on almost every piece of the stone, there are different shapes and sizes of water stains like footprints or footballs on them and never go away even in the dry... Read More

Q. I have a 2nd floor shower with moisture resistant sheetrock. I want to put 18" travertine tile on the walls above the pan. Using modified mortar, can these tiles be put on the wall with mortar blobs leaving an air space behind tile or do the tiles... Read More

  Q. What can we do to clean marble lobby floors in our various commercial buildings? A. The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the world. There are several possible causes for... Read More

Q. I have an (intentionally) distressed marble seat in my shower. After years of use, there is a build up of white on top of it. How do I get ride of it? Thanks.   A. White residue on the top of stone can be attributed to several things. Ask... Read More

  Efflorescence - Removal and Prevention   By Frederick M. Hueston www.stoneforensics.com The crystallization of soluble salts in Historic masonry causes severe deterioration of the substrate. This crystallization is called subflorescence. These... Read More

  Efflorescence - Removal and Prevention   By Frederick M. Hueston www.stoneforensics.com The crystallization of soluble salts in Historic masonry causes severe deterioration of the substrate. This crystallization is called subflorescence. These... Read More

The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the country. There are several possible causes for this condition: Maintenance technique-Take a close look at your maintenance program. Are... Read More

Q. I have a base to a fireplace that is gray in color and rough, not smooth. How do I identify what type of stone it is? A. It’s entirely possible that your fireplace base that looks like stone isn’t natural stone at all. Many fireplaces... Read More