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My granite floor appears to be developing cracks beneath its surface. These cracks do not go all the way through the tile, but can be seen only in a bright light and only at certain angles. It almost looks as if they’re cracking from the bottom

The condition you are describing is called compression cracking. It is caused by movement of the substrate to which the granite is attached. If the granite tile is set over a plywood floor supported by joists, movement in the floor may be responsible... Read More

Here’s a question my customer has asked and I don’t quite know how to answer. “Every time it rains, a blotchy light-and-dark stain appears on my granite sidewalk. If it stays dry for several weeks, it goes away. What is happening, and can

Most granite is very absorbent, and will soak up a large quantity of water. What your customer is seeing is moisture in the granite, which can take anywhere from several days to several months to dry out. Once the granite dries apply a penetrating... Read More

Do you have a secret formula for a granite polishing powder?

I don’t know if I’d call it a secret formula but the following granite polish formula should prove effective on most granite. To one pound of tin oxide powder add 5 teaspoons of black oxide powder, 4 teaspoons of sulfur dioxide and 3... Read More

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