Care keeps granite hard to beat

One of the great building materials used today is granite. We use it for counter tops, cutting boards, flooring, shower walls, etc. Most folks use granite because it is very hard - 6 and 7 on the Mohr scale, diamonds being rated at 10. Most consider it waterproof; however, various studies have proven that water will penetrate granite over time.

Because water can penetrate granite, fungal spores germinate on its surface if water is present. The fungal hyphae are able to force their way into the spaces between the crystals using osmotic pressure. The fungi release organic acids that assist the hyphae in the penetration process. This occurs over long periods of time. There are several studies that document bacteria sticking to granite, especially granite counter tops.

As with any other material used in homes it's important to keep granite dry, that in itself is the best defense against the growth of mold and other microorganisms. Sealing the surface of polished granite can make it hydrophobic (repels water) which makes it less likely to soak up water. If mold does develop it can be easily cleaned using soap and water. A good disinfectant to use on granite is hydrogen peroxide.

Granite contains 10-20 ppm (Parts per million) uranium, which decays to produce radon gas. Most health physicists agree that granite counter tops may emit radon gas; however, the levels are insignificant compared to background levels, which makes them safe to use in homes.

When cleaning with any cleaning product, always wear eye protection and rubber gloves to protect your hands. If you would like to share a cleaning idea or concept with the reading audience, call Ed at NWES (255-2266), e-mail them to madan@nwees.com or send them to the Daily Bee, 310 Church St., Sandpoint, ID 83864, Attn: What Would Ed do?  For more information about Ed, check him out at www.nwees.com.

Copy written by Edmond E. Madan, certified forensic, fire, flood, mold inspection and remediation/restoration contractor. Ed is president of Northwest Environmental Services, Inc.