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Our Services → Chinese Drywall FAQs

The most definitive way is to identify the markings on the backside of the drywall, which requires destructive testing (removal of walls).

However, on certain drywall there are no discernible markings on the back making its origin unknown. Furthermore, according to the Florida Department of Health, the presence of Chinese manufactured drywall itself does not necessarily warrant the inherent odor and corrosion problems reported. There are reports of homes with Chinese manufactured drywall installed with none of the associated odor and corrosion problems and therefore should be treated on a case by case basis.

Yes, you can have your home evaluated in accordance with Enviro Team’s Chinese Wallboard Corrosion Assessment Methodology ET3-09. This method provides a cost effective approach using non-destructive testing methods.

The typical signs of the presence of problematic Chinese manufactured drywall are:

• The presence of sulfur type odors often described as “rotten eggs, a matchbook, onion and/or garlic”.
• Premature failures from corroded copper components in air conditioning cooling coils, electronic equipment, electrical components.
• Discolored (dark gray or black) copper plumbing tubing.

• What do I do if I have tarnished silver and/or discolored copper in my home?

If these items show visible signs of discoloration, there is likelihood that sulfur agents associated with problematic Chinese manufactured drywall are the culprit.

Based on most documented reports including those submitted by the U.S. Census Bureau and certain Florida shipping records, the Chinese manufactured drywall appeared to be associated with post 2005 hurricane season until present. However, that does not rule out homes constructed during the building boom from 2004 to 2005 or possibly earlier, when drywall was in high demand.

Yes, there is a possibility that the corrosion process could continue, particularly in hot and humid or wet environments (i.e. cooling coils). Although the primary source of the sulfur/corrosive producing material is removed, the corrosion process on any of the affected metals could continue if the sulfur compounds and a moisture source (i.e. relative humidity at the proper level) are present.

Currently there are no known industry guidelines or “treatments” that are available. As such, removal of the offending wallboard is the most common remedial effort. Furthermore, in experience over that last few years we’ve found that  application of wall sealants, paints, ozone treatments and outdoor air dilution has not corrected the problem.

 Each home is different. We suggest contacting our offices to discuss options available.