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Why White Marble Turns Yellow: Causes and Cures

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Fred M. Hueston, PhD Sitting in my office one morning I received a call from a very upset home builder. He told me he was building a two million-dollar home on the west coast of Florida. They had installed nearly 3500 square feet of a white statuario... Read More

We have Italian marble on the lobby floors in our commercial office buildings. Recently, we have noticed several problems: 1. Entire tiles are evenly discoloring yellow or grey and 2) Rust-like stains are appearing in an area near the door. What

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

I have been poulticing a stain on a red granite counter top using a clay poultice and a commercial degreaser. When I remove the poultice the area where the poultice was is very dark and does not seem to dry out and lighten. What causes this and how c

This is a very common problem on granite. Granite is a very porous stone, more porous than most marble. Because of its porous nature, granite has the ability to retain a great deal of moisture. The dark area in this case may simply be excessive... Read More

Hi, I need to do something about dingy looking grout in a commercial setting. I have heard that there are several manufacturers of colored grout seal. I would be interested to get any input on this product and if there are some that are better than o

I personally recommend Grout Perfect (www.groutperfect.com) though there are many out there. It is a superior product, easy to use ,and has benefits that go beyond just looking pretty, such as constant acting mildewcides and more. Fred... Read More

How often should I have my marble floors professionally polished?That’s a difficult question, since it depends on the type of marble you have, how hard or soft it is, how much traffic the floor receives, and many other factors. On the average,

That’s a difficult question, since it depends on the type of marble you have, how hard or soft it is, how much traffic the floor receives, and many other factors. On the average, most marble floors in a home need to be polished about once every... Read More

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