Drywall is a broad product category that includes five or six prominent U.S. names: ToughRock, Gold Bond, ClassicRock, ...

Unless you live in an older home with plaster and lath walls, then you’re likely surrounded by panels of compacted gypsum powder that make up the interior walls and ceilings in many homes.

After being asked about it for years, Paul Johnson Drywall Inc. started placing gypsum underlayment around 2016. “There’s a couple of anomalies, but almost every market that we've identified ...