I've leveled concrete floors using Quickrete's self leveling product.
It works well but as was pointed out it is a bit pricey. Estimate the
volume you'll need. If you're ok with the cost it's not a hard job.
Mix 25 to 50 lbs at a time, I use a 1/2" drill driving a mixing paddle
and pour it on. It will help to have one person mixing and another
spreading and working the surface.

Make provisions to put a form at each floor level entrance or exit.
Having self leveling concrete running out of a door can be a bit stressful.

My observation is that this product will not be as hard as the concrete
you'll be covering though. Be sure to install a good vapor barrier
before installing your flooring.

RB

D K Woods wrote:
We're purchasing a new home and looking into putting new flooring in. I
plan to use a finished room in the basement as an office, and want to
put in a 'hardwood' laminate floor. The problem is, the concrete in the
basement in *extremely* uneven. I don't know a specific depth since I
haven't pulled up the carpet that's current covering it, but I would
guess some of the worst parts vary by maybe 1" over a 2' area.
Positively wavy.

I've seen that Quikrete has a self-leveling floor resurfacer, but I
don't know if it will work to that magnitude (possibly with several
stages?). I also haven't found any indication as to how much might be
needed for a given area -- or where to get it, or how costly it is. What
kind of equipment is needed for this job? I've read that a power mixer,
or a mixer tool on a power drill, is needed, as well as some tubs and
cleaning agents. But I've also seen pictures of people using some kind
of tubing/hose to pour the mixture. Is this necessary? Fortunately, the
quikrete stuff allegedly does not need any trowling.

How difficult would a resurfacing project like this be? I'm new to
flooring AND to concrete.

And finally, will the fact that this is an interior surface alter the
estimated drying times? The room can be vented through a door into the
garage. What about fumes?

Much appreciated!
-david