| 2008-11-24 Recent concerns have surfaced in the media about the use of granite for kitchen countertops and possible emission of radon and/or radiation. The Environmental Protection Agency has been receiving calls from Radon inspectors as well as from concerned homeowners; The home buyer should have a professional home inspection performed prior to the contract signing. This will determine the true condition of the home thereby reducing the risks of safety issues and systems that would require attention in the near term.
Granite is a highly popular natural substance that is used for counters and other areas in the home because of its durability and beauty. Any material that is extracted from underground rock formations are potential radon sources and can be checked by placing test canisters near the countertop then sent to a testing lab for evaluation. The type of granite and colors that are more prone to emit higher levels of radon are the more exotic and expensive granite with red and brown veins.
The Environmental Protection Agency has been receiving calls from radon inspectors as well as from homeowners and potential buyers about granite countertops.
What is Radon and what risk could it pose?
Radon is a natural radioactive gas that comes from the earth's soil and rocks. Specifically, when uranium in the earth's crust decays, it produces radium, which in turn produces radon. Radon levels tend to be highest in basements since those areas are closest to the soil and rock. This odorless and colorless gas percolates through porous soils and then enters the air. Outdoors, radon generally is not much of a problem because it rapidly dissipates.
Indoors areas are more of concern. Radon gas can enter the home through gaps and cracks in foundations and insulation. Around pipes, sumps, drains and walls. Granite countertops are also potential sources of radon. Mike Kitto, at nyradon.org describes the type of granite and colors that are more prone to emit higher levels of radon. In general, he states that the more exotic and expensive granite with red and brown veins carry more concerns than the black, white and green types. Testing for radon is accomplished by placing canisters near the counters and/or in the basement of the home.
source:http://www.allystone.net/aboutstone/2008/Granite-Countertops---Some-Evidence-of-Radon-Concerns_150.html
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