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Graffiti Removal Procedure for Stone, Masonry, and Tile Surfaces By Frederick M. Hueston, www.stoneforensics.com If your beautiful building, wall, or other surface has just become the unintended canvas for graffiti, your first reaction might be to... Read More

Lichens and mosses produce oxalic acid, which can destroy calcium-based stones. Since they are considered plants, they will also attract moisture, which can cause all kinds of problems with the stone, including spalling. They can also cause the stone... Read More

A common problem with limestones and some marble buildings is that they get a brownish yellow hue after cleaning. Most of the time we find that there is a high content of iron in the water used to clean the stone. Use a chelating agent in the wash... Read More

If a stone fountain has a copper basin, chances are the stone may get green discoloration. The hard, green deposits are a combination of calcium deposits from the water and copper from the basin. The easiest way to remove them is to use a pressure... 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

First you need to determine how often and how heavily the bath will be used. Black marbles are typically soft, easily scratched and sensitive to acids; they are also easier to repair than granite, and less expensive. Granite, on the other hand,... Read More

There are several options for making the steps less slippery. Option 1. The steps can be honed and the polish removed. The high-gloss shine will be gone, but the steps will be less slippery. Option 2. Slip tape can purchased at your hardware or home... Read More

Flamed granite has a rough texture which will tend to hold dust and dirt. Prepare a solution of stone soap or neutral cleaner and warm water. Flood the floor with this solution and either agitate with a scrub brush or machine-scrub. Pick up the... Read More

The spotting can be caused by dripping toilet bowl cleaners, which can etch the marble surface. As of this writing there are no sealers that will prevent acid etching. I would suggest purchasing a non-acidic bathroom bowl cleaner, available at most... Read More

Both granite and marble make excellent counter tops, depending on the counter’s intended use. Marble is sensitive to acids, which can make it difficult to keep polished in a kitchen. Granite, by contrast, is acid-resistant, and can make an... Read More