You need handle the subfloor,which makes the surface quite smooth ,then you can directly install.
of course you need adopt smooth cement.
I wanna to communicate with everyone who want to be familiar with vinyl tile such as methods of installation and maintanance.
We are the professiona vinyl tile manufacturer,we can give you a chain of production flow ,technique and some relevant things,we belive that we will enter the deep communication with each other.
If you need any help ,pls let me know in time!