Stone & Tile Restoration

When recrystallization is used on Thassos marble, yellowing can occur. The yellowing is probably caused by a reaction of the chemicals in the recrystallization product and the iron in the marble. Not all recrystallization products cause this... Read More

When carpet is removed from terrazzo, it often leaves behind a large yellowed area the shape of the carpet. This is common problem with carpets that have jute or rubber backings. Moisture becomes trapped under the carpet and causes the dye in the... 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

There are several methods that can be used to remove spray paint from granite. Time is of the essence, the quicker you can remove the paint the less likely it will penetrate deeply into the stone. If the stone is polished, try scraping the paint... Read More

If the product you are using is a true impregnator it will not add or subtract from the slip-resistance of the stone. The impregnator is designed to penetrate below the surface of the stone. Check the product label carefully.CAUTION If an impregnator... 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

Generally, an acid will not cause any problem with an unglazed terra cotta. However be sure to use a acid specifically called for in the cleaning of terra cotta. Follow the directions carefully and be sure to rinse throughly to remove all acid... 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

Suppose you have an interior granite wall that had some silicon caulking used in the grout joints. The silicon then caused staining along the grout edges. A poultice successfully removed the staining, but then later, the stains reappeared. What... Read More

Applying an impregnating sealer to stone will not make it waterproof. The idea of an impregnator is to make the stone water-resistant. In order to make the stone waterproof we would need to completely block the pores of the stone. If this is desired... Read More