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The screed is the surface layer of the subfloor on which the floor is then laid. It is a building element, generally between 1 and 8 cm thick, which is then covered with all types of flooring, be it ceramic, wood, marble, vinyl, etc.

Traditional screed

When we speak of screed, on the other hand, we mean the element that is used directly above the subfloor to perform various technical functions. Regardless of the type of covering chosen, the screed must be smooth, even, clean, free of cracks, compact, deposited, dimensionally stable and mechanically resistant.

It can be described as a “finishing” and is therefore supported by a lightening-insulation-compensation layer.

Screed: types and properties

Speaking of screeds, we are first dealing with a different choice of thickness. Indeed, it can be variable depending on the type of use (residential, industrial, etc.). Among the different types we find:

  • Natural base: it is made of pure natural lime, ideal for renovating historical buildings;
  • Self-levelling screed: It is a product made of cement, sand and chemical additives that, when combined with water, becomes very fluid and easy to level;
  • dry: These are the types of screed that guarantee the same performance as traditional screeds, but with lower energy consumption.
  • in sand and cement: This is the classic screed made directly on the construction site with sand, cement and water;
  • in expanded clay: this is a very light pre-mixed product that ensures excellent performance at both acoustic and thermal levels.