Plastering

Plastering is the process of applying a plaster coat (a mortar of binder, sand and water) onto walls and ceilings to create a smooth or textured, load-bearing surface ready for paint, wallpaper or tiles. The plaster protects the masonry, evens out irregularities and, on interior walls, also helps regulate humidity in the room.

Updated 2026-10-11

Plastering: Handwerk & Bau – CityHero glossary graphic

What is Plastering?

Plastering is one of the classic building trades: a pasty plaster mix is applied to masonry, concrete or insulation and pulled flat until an even surface forms. A distinction is made between interior plaster (usually gypsum or lime-cement plaster for living spaces) and exterior plaster (facade render on a lime or cement base, often as the finishing layer over facade insulation). Depending on the binder and grain size, the surface can end up fine and smooth or textured, such as a scraped or rough-cast finish.

The work almost always follows the same steps: check and clean the substrate, prime if needed, fit corner beads and reinforcing mesh, then apply the plaster in one or more coats, pull it flat and – depending on the desired finish – float, smooth or texture it. Plaster needs drying time between coats and before further work; painting too early risks cracks and stains.

Plastering is needed for new builds, conversions and renovations, after removing old coverings, or when walls are uneven, damaged or damp. Slots and holes also have to be plastered after electrical and plumbing work.

Watch for quality: flat surfaces and clean edges, a plaster system matched to the substrate, and respected drying times. Costs depend on the area, substrate, type of plaster and the amount of preparation work. Ask for a detailed quote and clarify whether priming, scaffolding and disposal are included.

Example: Plastering in practice

During a flat renovation in Winterthur, old woodchip wallpaper is removed, revealing walls that are uneven and damaged in places. The painter re-skims the surfaces with gypsum plaster, fits corner beads on the outer corners and lets everything dry thoroughly. Only then are the walls primed and painted white – the result is a smooth, crack-free surface.

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Frequently asked

What is the difference between plastering and filling (skimming)?

Plastering means covering a whole surface with a usually thicker plaster coat to build up and even out a wall or ceiling. Filling or skimming is the finer work: thin layers to smooth, fill holes and cracks or prepare for painting. Skimming often follows a coarse plaster as the finishing touch.

How long does fresh plaster need to dry before painting?

This depends heavily on the type of plaster, coat thickness, room temperature and ventilation, so it cannot be stated in a fixed number of days. Gypsum and lime plasters need considerable time to dry through. Only paint once the plaster is fully dry and has lightened in colour – your specialist will tell you the specific waiting time for your material.

Can I plaster myself or do I need a professional?

Skilled DIYers can manage small repairs such as filling individual holes. Larger areas, smooth visible surfaces, facades or plaster over insulation require experience, the right materials and tools – here a specialist pays off, as mistakes like cracks or uneven walls are expensive to correct later.

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