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A few weeks after being installed, entire floor is cupping. These are Pre-finished, 3/4 inch thick, solid oak strip floors. What’s best way to resolve the problem? Can they be sanded down smooth and re-stained & re-finished? What is a normal price point for this sort of job? Also, flooring was purchased at ********, which sells discount flooring materials (which I found out later are often “seconds” or slightly damaged). I’ve seen other installations where the same flooring has been used & they exhibited similar problems with different degrees of cupping. Sometimes just a small patch was cupped & others when larger or separate areas cupped. I’m assuming the flooring to be the same because of the large number of visible “flaws” in the wood such as knots and dark streaks. (Although the flaws are what I found most beautiful about the floors!) Could it be that the wood was still too green when they were pre-finished but the problems not occur until after installation due to trapped moisture? Would the manufacturer be responsible for this? Any info would be greatly appreciated!

I laid a oak tongue and groove floor in winter on two layers of plywood. The humidity in the rooms was a bit low but last summer, when the humidity increased the flooring buckled up. Can this be because I didn’t leave enough gaps in-between the plywood sheeting underneath. What can you suggest?

Hi, we are placing a used 3/4″ clear southern yellow pine tongue and groove floor down. It was actually used on a wall and we are putting it on our floor. It has been impossible to line all the previous nail holes with the joists or even with each other - I finally gave up on that. There are several widths from 5 1/4″ to 14″. It is in great shape except there is a little cupping here and there. We have a couple of questions - what is the best way to tighten the cupped boards.

We just had oak floors put into our kitchen. When you look at the floor from an angle, they appear to be wavy. Is this normal? If not, what can be done to correct the appearance?