Clean the floor area to be filled with a broom or vacuum and dampen it with a wet sponge to avoid rapid drying.
How to level out a floor.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
The easiest way is to use a self leveling compound also called liquid floor underlayment or floor resurfacer within sections of level cut rails.
Self leveling compound is a cement based mixture that is applied in a near liquid state.
When inflexible flooring is installed over a substrate that dips or heaves various things.
Take everything out of the room so that the floor is completely clear.
Start by stabilizing the moisture content of the soil near the foundation.
Remove any baseboards as well because the height of the floor will raise after you level it.
Thus by repairing your out of level floor you may find the windows and doors in your home are a whole lot easier to use and last longer.
It will find the lowest areas of the floor and work to level out the subfloor.
You can then spread it out on the floor in the affected areas.
Raise the lower end of the level until the bubble is centered then measure the distance from the bottom of the level to the floor to find the depth of the dip.
With this type of substance you can apply it with a trowel and spread it evenly over the floor.
Then you will need to let it dry before you do anything else with the floor.
Remove all of the furniture appliances and baseboards from the room.
The material flows out like thick syrup then hardens into a smooth perfectly level surface sometimes in less than an hour.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.
Lay a long level downhill on the floor with one end of the level on the level part of the floor and the other end at the lowest point.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
If you suspect that you re working with an off level foundation you can get it ready for installation quickly by using a floor leveling compound.
Installing gutters and downspouts and keeping.
You can then smooth it out using a hand trowel and sand the entire surface for a seamless finish.
Simply mix up the compound pour it over the subfloor and wait for it to fill in the lowest spots.