Grout New Grout Crumbling/Pitting - Tile Advice

[home_reno]

Hey All,

Last week, contractor installed wall and floor tiles and am now seeing pitting/holes/crumbling grout. They used Laticrete SPECTRALOCK® 1 Pre-Mixed Grout on both wall/floor.

1. Is this normal?
2. How does one remedy this?
3. Do I need to worry about this failing/leaking water?

 

[Tile Marble Granite]

Hard to tell by looking at those two pictures. It looks like sand or dirt to me. I would not have used Pre-Mixed Grout. Always use powder grout. Period!

 

[Samerlam]

That’s not cracking that’s tile adhesive that should of been removed before grouting just get a Stanley knife and scrape those areas and put new grout in.

 

[Dan]

Tile adhesive showing through the grout for sure.

Got any pictures of the tiling in general? Is it a bathroom or kitchen?