He simply filled low areas.
How to level a wooden floor for tile.
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.
Make a final check with the level to be sure all the high and low spots are gone.
Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Prepare a wood subfloor for tile a successful tile installation project requires a level surface.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Apply the primer evenly with a roller brush.
If the floor is uneven lift up the board until it is level so you ll know how much flooring compound you ll need to even it out.
How to level a floor for installing tile before you install file flooring follow the directions above for fixing high spots and low spots in a wood or concrete subfloor.
Pour a generous amount of mixed leveler onto the subfloor focusing on one or more wavy areas.
2 to pour self leveler on plywood directly and skip hardiback.
In order to level the subfloor to install tile the builder suggests 1 to put a paper on plywood and pour self leveler and skip hardibacker.
Spread the leveler over the floor with a trowel or a gauge rake so it covers each low area completely.
And 3 grind the hump of the plywood.
Floors are rarely perfectly level.
Mix the floor leveling compound with water in a bucket following the manufacturer s directions.
If you find hollows and valleys you must fill them with a self leveling underlayment.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
Then vacuum the floor with a wet dry vac or sweep it with a broom.
Which could raise the floor substantially.
Allow the primer to dry according to the manufacturer s instructions.
If an engineer found no structural issues you may be able to level the floor by applying a cement based self leveling floor product such as henry level pro self leveling underlayment available.