But the report released Thursday stopped short of linking it to health problems, foul smells or corrosion reported by homeowners, saying further study was needed.
The U.S. Consumer Product Safety Commission, the Environmental Protection Agency and others have been analyzing the drywall.
Construction companies imported millions of pounds of cheap Chinese-made drywall during the height of the U.S. housing boom, when building materials were scarce.
Homeowners now complain that fumes from the wallboard that smell like rotten eggs are destroying properties and even making them ill.
More money-related links:
- Save money with Local Coupons
- Coupon Bug helps you save cash
- Saving with 6abc reports
- Share on the Saving with 6abc Message Board
- Track your stocks
- Follow Action News on Twitter
- Get Action News on your website
- Follow Action News on Facebook
- The latest Philadelphia headlines from the Delaware and Lehigh valleys