Five years ago we purchased a small house that was over a century old. We have been lovingly restoring it ever since. Trying to stay with materials and styles of the era, we installed a wood floor using 6 inch wide t & g boards. These boards were supposed to be dry when we purchased them, and we kept them in the room of the house where they were to be installed for 3 weeks to acclimatize before starting the installation. Unfortunately, our precautions were to no avail. We now have a beautiful wood floor that has major separations between each and every floor board! We cannot afford the time, money or energy to rip this out and start over. The cracks look horrible and collect all the dust and dirt that is tracked in. What is the best thing to use to fill these cracks? We have already tried wood fill and white glue with sawdust mixed in. Both chipped out within a few weeks under regular wear and tear. Help!