We've removed old ceramic tiles that cover a tongue and groove bathroom floor. What is a good way to remove the hard tile grout that now covers the floor?
EDIT: updated title as we've found Rimu is a podocarp softwood
EDIT: To answer the comment below, yes we would like to finish the boards with polyurethane varnish in keeping with other parts of the house
EDIT: after trying a bunch of approaches what worked was using a belt sander with P80 belts, stubborn areas required a little more pressure
Best Answer
Scraper. This is going to be a tough job if you want to keep damage to the wood to a minimum. It does look like the floor has some type of finish on it before the grout material was applied. This should help a lot to make the scraping removal a bit more practical.
Note that what ever type of scraper that you use will likely need replacement or resharpening a number of times in your removal process.