Self-levelling screeds have lower thicknesses, are more regular and do not require mechanical means for smoothing during laying.
When are they used?
- In the presence of underfloor heating systems
- In case of construction or renovation of apartments, offices, shops, shopping centres and hospital facilities
- They are not used for outdoor use
The self-levelling screed is used before laying the floor. Thanks to the presence of this type of screed, the floor will be precise, more regular and without unevenness. In short, the perfect base for tiles or parquet.
It is often used as a finishing product on top of a hard concrete base and can also be used to encase underfloor heating pipes.
What are the main characteristics of self-levelling screeds
Self-levelling screeds are versatile and quick to lay. They are smooth, fluid and able to withstand even high mechanical resistance.
They are mainly used to fill large areas (building renovations, shopping centres, etc…), in a short time or in case of underfloor heating.
The self-levelling screed, in fact, contains fluidifying agents inside. These allow a low degree of porosity and therefore a high degree of thermal conductivity. All facilitated by a lower thickness compared to other types of screed.
The greater fluidity of the self-levelling screed allows the tubes to be wound without creating thermal dispersion, guaranteeing heat.
The self-levelling screed for floors of this type can only be used inside buildings because it is very sensitive to humidity.
For this reason, precautions must be taken to avoid inflictions that could cause detachment of the floors.
There are different types of screeds of this type on the market:
- Anhydrite screed
- Mixed screed
Different types that require different drying times: 24 hours for those who have chosen a ceramic or stoneware floor; 72 hours for a parquet floor.
It is a type of low thickness screed composed of fluidifying additives, cement and a mixture of aggregates. To counteract shrinkage cracking in the plastic phase
Instead of cement, an anhydrous gypsum, an airborne binder, is used as a binder. This makes it possible to create a screed that is more sensitive to moisture and therefore has shorter drying times.
It is a screed suitable for large surfaces and ideal for underfloor heating systems.
How to apply the self-levelling screed
Screed can be applied as a smooth finish on new floors or to level out existing floors. The screed itself is made up of one part cement to four parts water and is normally applied with a straight-edge, wooden / plastic float and finished with a trowel or power-float.
To produce the self-levelling screed you can use OVERMAT ALS-series system is the ideal machine for the precise production of self-levelling screeds.
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