Over time concrete floors can settle unevenly or become uneven due to cracking and moisture.
How to floor concrete.
Pour the fresh concrete over the floor then go over it with a 1 4 gauge rake to bring it level image 2.
Mix the citric acid concrete etch with warm water per the instructions.
Mix it until it is the consistency of a thick pancake batter.
To test the evenness of a concrete floor lay a 10 foot long 2x4 board across the surface.
Then apply scrub and squeegee off the floor in the same manner as the degreaser.
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.
Concrete blocks are then laid horizontally between the joists resting on the lips and level with the top of the joists.
Mix the concrete according to the directions with a mixing bit on a heavy duty drill image 1.
If the board leans or has gaps in certain spots then you can see where the floor is uneven.
Insulation is then put down underneath the screed or in some cases timber sheets.
The concrete was poured over the toilet collar flange and will be cut out later.
Hills and valleys that are more than 3 16 of an inch can cause problems for any flooring you plan to place on top of the concrete flooring.
Concrete joists with lips on either side about halfway up are placed on the floor.
Thinking about adding a concrete floor to your home.
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.