The home is decorated and paved flat, and the bathroom is better to fill in the sand or the slag of

First slag and then sand leveling. The key is tamping.

It must be good sand, anti-level.

Mix sand and stones in proportions.

Sand is better, but it costs more with sand.

Overhead, no need to fill in. I just finished renovating and have experience, you can ask me.

Why do so many people say sand is .........?I really don't understand, shop scum! It's like this in our family.

No matter what you fill in, the middle layer of thin adhesive paper is moisture-proof.

Look at my dad's years of experience in building a house to fill in the second one.