plasterapplied

Plaster applied refers to the process of applying plaster to a surface as part of building finishes. Plaster is a paste-like material that hardens into a solid protective and decorative layer. It is typically composed of a binder (such as gypsum, lime, or cement), an aggregate (sand or other mineral particles), and water. The binder choice influences breathability, durability, and suitability for various substrates and climates.

Common plaster types include gypsum plaster for fast interior work, lime plaster for historic or highly breathable finishes, and cement-based plaster for exterior rendering or interior walls needing greater strength. Lime-based plasters may use lime putty or hydraulic lime with sand and sometimes pozzolanic additions. Cement-lime or cement-based plasters balance strength with some breathability and are widely used in modern construction.

Application systems vary. Traditional plastering often uses a multi-coat approach on wood or metal lath, typically including a scratch coat, a brown coat, and a final finish coat. Alternatively, plaster can be applied over gypsum plasterboard with a finishing compound, or as external renders directly onto masonry or concrete substrates. Surface preparation is essential: removing loose material, creating a key, and sometimes priming. Plaster is spread with trowels, keyed by scoring the first coat, and left to cure between coats. Finishes range from smooth to textured, depending on tools and techniques.

Quality and durability depend on proper bonding, correct mix consistency, substrate suitability, and appropriate curing conditions. Cracking, debonding, and moisture-related problems are mitigated by correct detailing and, where appropriate, control joints in larger surfaces. Plaster applied remains a common method for interior walls, ceilings, and exterior renders across architectural styles.