Does the Staenis grid replace a decoupling mat?

Yes, the Staenis grid divides the screed into surfaces of 0.5 x 0.5 m. This distributes the dish-shaped effect and minimizes it per compartment. As a result, the screed continues to rest on the substrate and the tiles or floor finish experience no stresses, making a decoupling mat unnecessary, since the problem is solved at the source in this way.