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Understanding screed technologies

Whether it is used to finalize a slab, as a support for floor coverings, or as an insulating interlayer, the screed is a key element in a floor preparation process. This is why its quality, but also its integration into the whole construction site, are essential.

There are two standard technologies when it comes to screeds. The first technology, known as anhydrite, which is based on calcium sulfate, was developed in Germany in the post-war period. As it is almost waterless this technology experiences virtually no drying shrinkage, making it possible to cover large surfaces and maintain a high level of performance. However, is has a major downside: 3 to 4 months are required for the screed to fully dry, which has a significant impact on the schedule of a construction site.

The other major type of technology is cement-based. It dries faster, about 14 days, but is highly vulnerable to desiccation (i.e. water evaporation), which makes it difficult to use on large surfaces and exposes this type of screed to risks of cracking.

The question is then: how to combine both benefits, and create a screed that dries quickly, and doesn’t shrink or crack?

Preparing for the future

"Everyday we need to find a new technology to increase the knowledge."

Reducing drying time while still guaranteeing performance

The major innovation of Technis is the use of a hybrid technology that generates molecules called "ettringites". These molecules absorb water and allow it to evaporate into the cement, thus preventing loss of volume. Thanks to this technology, the screed can be applied to large surfaces without cracking, and with a drying time of seven to fourteen days depending on the surface: the best of both worlds.

Technis technology is compatible with all types of substrates: concrete floors, earthen floors, asphalt screeds, wood substrates, non-putrescible coverings, and a wide variety of coatings, making it the best solution for surfaces as gymnasiums, schools, hospitals and homes, both indoors and outdoors.