I m putting hardwood in my house. I removed the carpet in the living room. Under it was old hardwood. Connected to that was my entry way which had a spanish tile in it. It was removed as well but now the floor in the entry way has all kinds of uneven spots in it. My brother in law put cement in some of the spots. He laid the hardwood( floating floor) in the living room and entry way. Now theres a slight bump where he tried to transition the living room and entry together. He put cardboard down to try to even the floor out with the old hardwood thats already there and where the old tile used to be. When i walk in the entryway the floor sinks, and creeks as i walk on it. Any advice on what to do? I m not wanting to spend a whole lot more as i already have. He says it won't break the wood, or it won't come apart but i m not so sure about that. Please help! How can i fix an uneven floor? and if i pull up the floor will that destroy the wood?
Kris[/b]

Cardboard is a no no .. If the floor is not glued at the tongues you should be able to remove it without damage .. float it , and replace the floor .. did you put any 6 mil polly on the floor first in the rest of the floor for a moisture barrier ?

I m glad you confirmed that cardboard is a bad idea. I m not the one installing it but i knew it didn't seem right. The only thing under the floor that was used, was the plastic padding. I was unaware that i need to put anything to absorb moisture. Thanks for the advice. I guess i had to learn the hard way. kris

The 6 mil polly is not always necessary , depends on the sub floor and what type of pad you are installing over .. you had mentioned flashing it with cement ..

Some underpads come with an attached vapour barrier. You may be lucky. The purpose is not to absorb moisture, but repel it.
Floating floors are a little tricky in that they need more stringent level requirements. Other than esthecally, you could nail a floor over a much more irregular floor, just wouldnt look too good.
If your floor is spanning a low spot, you could try drilling a small hole in a grainy area of a panel, and inject epoxy under the floor. Not the greatest idea, but will work to reduce the flexing you ae observing.
Otherwise, you will need to remove the floor from the point of last installed panel, back to the affected area and use a proper levelling compound; but do not re-install until compound is completely dry. Could take a day or more, depending on the thickness of the compound.