Tiny dips or ridges in the concrete won t affect your hardwood floor installation but large ones can lead to floor squeaks later as the connection between the floor boards is stressed.
Concrete uneven under wood floor.
Concrete blocks or heavy items leveling an uneven subfloor leads to an even wood floor.
But if you cover the uneven subfloor with self leveling compound before installing your wood flooring your new floor will be even and level.
First measure the difference between the high and low points of the floor.
If the entire slab is uneven you may have to use a self leveling concrete compound to smooth it out.
Remove carpet rugs padding and padding strips.
All you need is complete access to your concrete floor area.
If you install wood flooring directly over an uneven subfloor your new wood floor will be uneven as well.
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.
The cause is usually settling or shifting of the foundation underneath the floors.
This is a situation you might encounter in some older homes.
Mold and or rot in your crawl space.
For a solid wood subfloor.
Self leveling compound is similar to concrete typically coming in large bags in powder form.
If you have old vinyl or any other flooring over uneven concrete demo and remove all debris.
Uneven floors are rarely caused by problems with the floor itself.
Use your judgment to see what will be in the way and remove those.