Hi,
we've just had our floors refinished, after returning home last night we're not sure if our expectations were just too high or if the job just wasn't done well enough.

After doing some initial research we were aware that refinishing will not equal a brand new floor but we're disappointed in the look and finish of the floor throughout.

There are wavy lines throughout the floors


in general the floors are bumpy, also there are some glossy lines, almost appears like an application issue of the polyurethane, visible best almost in the center of the bottom of the reflection and the step:



another view of the wavy lines

Hi there,
Your post looked interesting to me.
The wavy lines throughout the floors is very common issue on the floors after sanding. There could be a few reasons for them to appear. It could be a problem with drum in the drum sander that been used to sand the floor. Second, it could be problem with the floor if it is not well secured to the subfloor. Also the waves are more obvious on the old kind of wood floors that been installed over sleepers (not solid plywood). Basically, those waves are the result of resonant oscillations of the floor during sanding process right in the point of contact of the sanding drum and the wood floor.
In other words, in most of the cases, those waves appearance is not a result of "bad job" of flooring contractor. It just happens.
Is there any solution? Yes, there is. Those waves can't be removed by the regular buffer, but I know at least 3 tools that can make the floor flat-flat. Those tools must be run over the sanded floor right between machine and buffer. It's additional operation, so some contractors are doing that and some not.

Sincerely,
Roman K.