Having lived through and written about the Great Mold Crisis and other scares, I'm watching with interest the development of another potentially hazardous-to-your-health building issue: Chinese drywall.

You've probably already seen the reports: Material shortages after Hurricane Katrina caused U.S. builders to start using drywall imported from China, which allegedly emits sulphurous vapors that corrode metal and could adversely affect health. In common use since 2008, it's estimated that enough of the drywall has been used to construct 60,000 houses of 3,000 square feet each.

At this point, the issue is still just a blip on the radar, with little or no insurer reaction in the form of policy changes or exclusions. Most insurers seem to be taking a wait-and-see attitude to determine the exact trigger of the problem (some say moisture activates the nasty fumes) and whether the threat is real or exaggerated.

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