When you are dealing with uneven floors one option that you have is to use self leveling compound.
How to level pantry on uneven floors.
On the top side of the floor another fix it idea to lay down new hardwood over the existing floor.
Mix the floor leveling compound with water in a bucket following the manufacturer s directions.
That is how thick you will need to cut your next board.
Measure about 12 away from the board you just installed and measure the gap between the floor and your level.
You need to fix the uneven floors by using a leveling agent or putting down a new subfloor.
If the uneven floor is due to floor joists that have warped or twisted over time or were incorrectly installed the only way to level the floor is to remove the subflooring and shim the joists.
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.
Pour a generous amount of mixed leveler onto the subfloor focusing on one or more wavy areas.
Installing carpet pad over uneven subfloors or floating floors over uneven subfloors will only cover up the problem temporarily.
You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings.
Place your level on the support and the high point of your floor so that you can determine the appropriate depth for the rest of your boards.
The carpet pad over uneven subfloors will wear unevenly and quickly with the pressure from feet and furniture causing the carpet and the padding to wear out much quicker.
Self leveling compound is similar to concrete typically coming in large bags in powder form.
Place a thin angled item under the short leg or side of the furniture.
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.
For example if you are trying to level a chair on a sloped floor slip a book of matches or a wooden shim under the leg that isn t reaching the ground.
A plywood subfloor will bridge any minor waves in the existing floor and leveling compound would help too.