[Secret Agent Man]

The drywall wasnt fake, it was contaminated with something. It either was food for mol which grew, or mold itself.

[TigerLikesRooster]

Questionable materials and defective manufacturing process. The drywall is said to give off toxic chemicals after a while. If a product is grossly defective and a dangerous health risk, I think the distinction between substandard and fake starts to be blurred.