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Plaster is primarily used in construction to create a smooth, finished surface on walls and ceilings. It is applied over various substrates such as masonry or drywall to enhance the aesthetics of a space. When properly applied, plaster provides a uniform surface that can be painted or decorated, which is essential for achieving a polished look in interior environments. This application contributes significantly to the interior design and overall ambiance of a building.

While plaster may have some thermal properties that could contribute marginally to insulation, its main function does not focus on insulating against cold. It is not a structural element but rather a finishing material, so it does not provide structural support. Additionally, while plaster may contribute to durability by protecting surfaces from damage, it should not be considered a primary means of enhancing the durability of the framework itself. The role of plaster is predominantly cosmetic and functional in terms of surface finishing.