Red Seal Carpenter Practice Exam 2026 - Free Carpenter Practice Questions and Study Guide

The main function of drywall is to create an interior wall surface. Drywall, also known as gypsum board or plasterboard, is primarily used in the construction of interior walls and ceilings within buildings. Its smooth surface is ideal for finishing, painting, or applying other decorative materials, making it a popular choice for residential and commercial projects.

While drywall can also contribute to fire resistance when combined with specific fire-rated applications, its primary purpose is not as a fire barrier but rather as a structural and aesthetic component of interior spaces. Additionally, it is not typically used as an exterior wall material or for insulation against weather changes, which are functions fulfilled by other materials like siding or insulation boards. Thus, the defining feature of drywall lies in its role in shaping the interior surfaces of buildings.