Some common mistakes when building the foundation:
– The floor is peeled and crumbly due to rolling with dry glue, before rolling, do not water to wet the concrete floor.
– Improper grout distribution, dirty sand causing pitting and cracking of the floor.
– The level of the rolling floor is not flat, due to the deviation of the rolling mark.
– The floor is pitted due to dirty sand mixed in the mortar.
The quality of the screed determines the quality of the finished screed.