Dear Marc
I am so sorry to hear of your troubles, Bruce makes floor that rate from mediocre to really excellent, and I have had some minor problems with their products, but nothing like you are experiencing. You failed to tell me the style of floor you bought. Bruce makes some Tavern Grade products (I will never use these) that have no warranty on them. And this low grade wood will certainly crack and crumble under foot. It is meant for a very rustic look in a rec room or even commercial tavern. The wood in this case will not benefit form a re-sanding as the boards themselves have internal voids and cracks in then, and will continue to self destruct over time. You must keep your shoes on with these Tavern or Rustic Grade floors.
Be sure you ask you builder what grade you have, as anything better that this low grade will have a warranty, and he and you may be able to get Bruce to pick up the tab for repair and replacement. Your damage must be way beyond the 5% waste normally allowed.
You didn't t say what depth wood it is or if it was laminated or solid wood or what, so I cannot tell you just how many sandings you may get out of your floor. Email me back soon with more details, and I might be able to help you.
As always your Most humble servant, Joseph, the Wood Floor Doctor.
You may also find these articles helpful:
1. Prefinished Hardwood Floors: How To Choose!
2. Avoiding Squeaks And Pops When Nailing Down A New Strip Floor
3. Custom Staining Wood Floors Without The Blotchy Effect
4. Plank And Strip Flooring
5. How To Take Care Of Your Health And Safety when Installing, Finishing, Repairing or Cleaning your wood floors