Use a hammer drill with 3 16 masonry bit to drill a hole through the wood and into the concrete floor.
How to frame a wall on uneven concrete floor.
Measure all the studs individually and toe nail them into the plates.
I use tapcon concrete screws to secure the wood to the floor.
Use a chalk line on the floor to indicate wall placement and cut a 2 by 4 to fit.
Snap chalk lines between each set of marks to guide the wall installation later.
Use an impact driver to drive a 3 tapcon screw through the wood and into the floor.
In this video i show you the method that i use to attach basement framing to a concrete floor.
Fasten your bottom plates to the floor where you want your walls.
Cut pressure treated 2 x 4 boards to length and lay them along the chalk line.
When a floor is uneven the best way to frame a new wall is to set the floor and ceiling plates first.
Then remove the tape.
Walls are built from the ground up.
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.
Use a long level or a laser to mark straight up from the bottom plates to the ceiling.
Tape a one foot by one foot square of plastic sheeting plastic kitchen wrap will do to the concrete wall in your basement with duct tape and leave it in place for 24 hours.
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.