I live in a flat with traditional wood flooring boards. They are pretty much in good condition although some have gaps of a few mm. Anyway we want to fill those gaps probably using Bona Gap Master (I heard it's good) and sawdust + resin. My main worry is to stain the floor with a darker colour and screw it all up. What is the procedure to fill gaps and stain the floor?
Best Answer
If you sand it you'll eliminate the charming deep grain and rough-sawn artifacts. I wouldn't sand anything but what seems like an injury hazard. I'd also leave the gaps empty. A hard-floor vacuum will keep it clean enough.
To the second question, staining without sanding will give very dramatic color variation in the open grain and saw kerfs. You'll get a nice rustic look. If you prefer a more modern, uniform color, sand it well to an even smoothness after you fill the gaps.
Having said that, I'm voting to close the question as primarily opinion-based.