Grouting quality - advice needed

[Badger2021]

Over wetting the grout weakens the strength/hardness of the grout. There is a reason there is a mixing ratio on the back of the bag. If over watered it won’t fully hydrate/set.
It needs raking out and doing properly.

I just asked him about that and he says that 'the second layer of grout (done 3 weeks after the first one) was just to seal those pinholes and that what is running is just the residue of that 2nd layer and once I wipe it off it will be fine. Is that even a remote possibility? Surely, that residue would have been wiped off when he sponged the grout at the end. Should I trust him or is he simply lying to get out of having to do this properly...

I'm gutted. I went from liking the bloke and wanting to recommend them to my friends to doubting a word he says or feeling like maybe I am just being played.

 

[Dave]

Give the shower walls a good wash down with clean water. Leave to dry. If it was residual grout , it shouldn’t happen again. Report back with your findings

 

[Rossaa]

It’s just air bubbles doesn’t matter how much I try I always seem to get the odd one of these
What he’s done is fine you worry too much
Why on earth you would you rake out the grout?
The residue will just wipe off

 

[Badger2021]

It’s just air bubbles doesn’t matter how much I try I always seem to get the odd one of these
What he’s done is fine you worry too much
Why on earth you would you rake out the grout?
The residue will just wipe off

well, if you research that there is general consensus that applying one layer of grout on top of another is not a good idea that will last so that's why I am worried. Grout doesn't adhere to grout, it adheres to the tile edges. I don't think expecting a watertight grout, without airpockets, from a professional is too big an ask.

 

[Kevbos]

Please contribute to this thread if you have any new information or can even just reiterate what has been said already. 🙂

It’s just air bubbles doesn’t matter how much I try I always seem to get the odd one of these
What he’s done is fine you worry too much
Why on earth you would you rake out the grout?
The residue will just wipe off

Great advice rossaa! Not