Hi
I just had a new 4" plant walnut floor installed with a oil finish applied. It appears to be a problem in the sanding /screening. When you look at the floor where ever there is a knot or dark wood the floor has a bump. This seems to tell me that the dark wood which is harder than the clear wood did not take the sanding the same.

So what was the problem? was the drum to soft? was it over screened with a too soft pad? and most important what is the fix.

thanks
ronbo404@yahoo.com

I think your assessment is correct. The "bump" you see is where a knot is . That part of the board is harder than the surrounding wood and will not sand as easily. The finisher should have hardplated the floor prior to screening. This helps with flooring of varying hardness and density. However, do not expect a table top finish from a hardwood floor. That is unrealistic. The remedy, IF bumps are severe enough, is to resand and hardplate. Most finish in place wood floors have some wave, bumps, undercut, dishout, etc. None are absolutely flawless, (except mine of course. )

In my days of selling, this would be called "character" knots. Enjoy them .