Plasterboard

Sheets of gypsum plaster sandwiched between two layers of paper liner, used as the internal lining of walls and ceilings. Standard board is 9.5 mm or 12.5 mm thick; specialist boards include moisture-resistant (MR), fire-rated (FR), and acoustic variants. Plasterboard is fixed to timber studs, metal stud framework, or masonry with adhesive dabs (dot-and-dab). Joints are taped and skimmed with a thin coat of finishing plaster.