Hey Mellissa
So sorry for the delayed response
So with the FA. anything that needs filled in again try to scrape it down to where you at least have a 1/16″ to fill. If you can get down a little further that would be best…..but not necessary
If your installing wood base, I would just get as tight to the floor as you can and nail in place. I would not caulk the base to the tile….that will be an area that will end up cracking and will probably look bad over time
Any additional questions let me know. I have this thread on to notify me
thanks
steve
