Final answer:
Drywall panels come in various thicknesses; thinner panels (1/4 inch or 3/8 inch) are used for flexibility on curved walls, and thicker panels (5/8 inch) are used for soundproofing. The insulation properties of drywall and other materials are important for controlling heat flow through walls.
Step-by-step explanation:
The thickness of drywall panels used for different purposes varies. In situations where it is necessary to cover old surfaces or curved walls, thinner drywall, typically 1/4 inch or 3/8 inch, is used because it is more flexible. When aiming to reduce sound transmission through a process called layering, thicker drywall panels, such as 5/8 inch, are preferred because they provide better sound insulation. Moreover, different types of drywall may have specific properties like increased mold resistance or higher fire ratings depending on the application requirements. When it comes to the rate of heat flow through well-insulated walls, as mentioned in example 118a, calculations would involve the wall's dimensions, the R-values of the insulation materials, and the temperature difference across the wall.
The standard thickness of drywall panels used for covering old surfaces, curved walls, and when layering to reduce sound transmission is typically 5/8 inch (or 0.625 inch).
5/8 inch thick drywall panels are commonly used in these situations because they provide a sturdier surface and better soundproofing compared to thinner panels. The added thickness helps to mask imperfections on old surfaces and create a smoother finish.