The wall thickness of drywall is usually made up of the total thickness of the (double-sided) planking made of gypsum board or gypsum fibreboard and the profile thickness of the stud. The usual thicknesses of the panels are 12.5 and 15 mm. The usual profile thicknesses of metal stands are e.g. 50, 75 and 100 mm, and of wooden stands e.g. 60, 80 and 100 mm.
The slimmest wall, with a wall thickness of 75 mm, is a single-layer metal wall with 12.5 mm thick plasterboard planked on both sides with 50 mm thick stud profiles. Requirements for statics (especially installation area and wall height), sound and fire protection or (sanitary) cable routing in the wall may require a larger substructure or multiple planking that increases the lowest possible wall thickness accordingly.
Below is a tabular overview of the resulting total wall thickness when using the standard products listed for single-stud walls. Deviations from this are possible, e.g. by using different panel thicknesses, by a different wall structure (e.g. in the case of a substructure of uprights and additional crossbeams) or by deviating profile thicknesses of the studs. There are also different wall thicknesses for other types of substructure such as double stud walls or installation walls.
Wall thicknesses for single-stud walls with planking made of 12.5 or 15 mm thick gypsum or gypsum fibre boards:
Source: bauwion
