adding grout to tiled floor

I have just finished tiling my bathroom floor (1st time doing this), and noticed that one small section of the joints between several tiles has a lower level of grout in it. Am I being a maniac perfectionist to notice this, or can I add additional grout to bring it up flush with the tiles? Do I need to wait until the entire floor has fully dried?

Since I posted this thread this morning, I am now noticing small cracks in these joints as they are drying. Did I not fill them enough with grout? I still have the same question; can I add more grout, and when? (Nothing is sealed)

Thanks for any help!

 

By adding more grout, you run the risk of it flaking out because the new layer will be so thin. It would be best to dig out the area of concern about 2/3 of the way down the side of the tiles and then put new grout in. How wide are your grout lines and did you use sanded or unsanded grout? What is on the subfloor under the new tiles?

 

The 13" X 13" tiles were put down with adhesive on cement, the grout lines are 1/4" wide and the grout is sanded. What did I do wrong to end up with these cracks?

 

You used an adhesive over the cement slab, what kind of adhesive? Was it modified thinset that comes in a bag or was it some glue that came in a bucket?

 

White, pre-mixed thinset in a bucket; nobody has walked on it either. The grout is also the "grout in a bucket" type.

 

And this was done when?, start removing it all and scraping all that crap off the tile.


NO PREMIXED anything that comes in a bucket for floor tile, Mastic is the only adhesive that can be used, and it is for walls only in dry areas with ceramic 8x8 or smaller, and never use it with stone.