I'm going to be installing some mannington or bellawood hardwood floors in the next month. I currently have carpet and the subfloor is concrete (above grade). I plan to use the glue down method.
The problem is that the concrete subfloor is extremely uneven to a degree as much as two inches. From what I've read, this can be fixed by using a large amount of quickcrete or other type of concrete. I have no problems buying 30 seventy pound bags and leveling the floor out.
What I would like to know is what are the typical pitfalls I may run into? If I get some of the concrete mixture on the walls, is that an issue? I have floor to ceiling windows - the bottom 5 inches is metal - can I apply the concrete against the metal? What are the other issues?
I plan to live in this place for a long time and I don't mind some very hard work. I just want to get it done right.