Estricharten

Estricharten describes the different types of screed layers used as a subfloor in buildings. They differ in binder, installation method, drying behavior and suitability for loads, moisture exposure and underfloor heating. The choice depends on the construction, final floor covering and required performance.

Zementestrich, or cement screed, is a cement-bonded layer with sand or aggregate. It is robust and suitable for heavy loads and areas with high moisture exposure, but it typically requires longer drying times and careful curing before subsequent floor coverings.

Anhydritestrich, also called calcium sulfate or anhydrite screed, uses calcium sulfate as binder. It generally dries faster and has good thermal conductivity, making it favorable with underfloor heating. It is moisture-sensitive and requires proper moisture management and protection before final floor coverings.

Kalkzementestrich combines lime and cement as binder. It is more breathable and flexible, fitting damp or renovated buildings. It dries slower than cement screed and offers good compatibility with historic structures, though its strength is typically lower than pure cement screed.

Leichtestrich, or lightweight screed, uses lightweight aggregates to reduce the layer weight. It is advantageous for upper floors and when insulation or load reduction is needed, and it can be used with underfloor heating, though mechanical properties depend on the chosen aggregate.

Gussasphaltestrich, a cast asphalt screed, provides high wear resistance and is often used for industrial or high-traffic floors. It is laid molten and cures rapidly, offering a seamless surface for certain floor coverings.

Selbstnivellierender Estrich refers to self-leveling screeds, which can be cement- or calcium sulfate-based. They flow before hardening to create an even, smooth surface suitable as a base for final coverings, typically in thin layers of a few millimeters.