If the surface is only mildly uneven and is only producing mild lipping at the corners of the tiles beating the tiles into the mortar bed can reduce the issue.
How to level a bed on an uneven floor.
Use a trowel with a 1 4 to 1 2 inch.
When you are dealing with uneven floors one option that you have is to use self leveling compound.
Floors are rarely perfectly level.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Self leveling compound is similar to concrete typically coming in large bags in powder form.
Make sure to drill straight so the shank.
These particular levelers have a long shank so they should be able to keep things level even on the wobbliest floor.
They adjust the bed height with pressure of your body.
Lock that spread on the compass.
If necessary stack two and place under the feet that need more height.
All you have to do is drill a hole.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
If the area is very large use a long straight 2 in 4 in 5 1 cm 10 2 cm board and set your level on top of it.
Are the beds legs uneven even if it s on a level surface.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
If you own a compass the kind for drawing circles not the kind that points to magnetic north set it at a spread that s as wide as the widest gap between floor and bottom of leg.
A simple permanent solution would be to scribe the legs to the floor.
Place a thin angled item under the short leg or side of the furniture.
This compound can potentially be utilized on a concrete slab or a wood subfloor and it works well when you are dealing with dips in the floor.
Cut it to an appropriate size and slid it under each foot that needed adjusting.