Installing flooring on an uneven concrete can cause buckling and loose boards after the installation.
How to level a concrete floor with cement.
If you plan on leveling a concrete floor you can do so with relative ease by using a leveling compound.
For a successful installation the concrete floor beneath the tile needs to be.
To resurface an uneven concrete slab begin by laying a long straight 2x4 wooden rail across the concrete slab floor with one end positioned on the high point in the room.
Fill any low spots with a cementitious leveling compound following the manufacturer s directions and allow it to dry before proceeding.
When you re finished vacuum the floor thoroughly with a wet dry vacuum or sweep it with a broom.
It spreads across uneven slabs filling in low spots as it creates a new level surface.
Keep checking the floor with a level as you grind the concrete.
Filling in gaps cracks and crevices as well as leveling uneven concrete will bring up the aesthetic and shore up the structure of the flooring.
Check your wood flooring manufacturer s recommendations and sand any high spots with a concrete grinder.
Grinding and repairing a concrete floor can create concrete dust so be safe and wear a respirator.
Typically the floor must be level and uniform within 3 16 inch every 10 feet.
See below for a shopping list and tools subscribe to this old.
An uneven concrete floor can be unsightly as well as unsafe.
Leveling a concrete floor for tile.
This old house general contractor tom silva shows how to resurface an uneven concrete slab.
Slip shims under the low end of the 2x4 rail until it s perfectly level then use a scribing tool to transfer the unevenness of the floor onto the rail.
A dust mask will not give you enough protection.