Patchy Mapei grout... any ideas?

[Boggs]

You could try a very fine wet and dry sandpaper over the grout lines, this has worked for me in the past.

 

[inbloomgardens]

Will give it a try thanks, looks iffy at the moment and needs sorting out

 

[Boggs]

That’s the problem with some grouts, I have had jobs dry patchy using Bal and Mapei.

You can do 10 jobs and one will be patchy, mixed the same, washed off the same. 🤷‍♂️

Although I had one go patchy and I had used softened water from the bathroom, not sure if that was why or not.

 

[inbloomgardens]

With the patches if they stay the way they are am I right in getting the builder to sort or is it down to me to sort?

 

[Boggs]

I think it would be fair for the builder to sort it for you.

 

[inbloomgardens]

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That's a section of the grout that has been drying since Friday morning
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That's what he's done today, would the adhesive be what's causing the issues? I've asked him that and he said he doesn't think so

 

[al strachan]

I’m not an expert, but he seems to be almost grouting with adhesive. Are you just seeing the darker adhesive shining through on the finished bits?

 

[inbloomgardens]

That's what I've been thinking, I have mentioned the adhesive but he seemed to dismiss it

 

[Boggs]

The grout lines need to be cleaned out before grouting, it might be a contributing factor.

 

[inbloomgardens]

Cheers, I'll have a word with him again in the morning

 

[inbloomgardens]

Just spoke to tile giant (where we got the grout) they said that it's down to it not being mixed properly and that the 2 options are to rake out and regrout or go for the grout reviver pen.

Spoke to my builder and he said rake out isn't an option so go for the pens, I thought great so ordered them and now he's saying that he doesn't know why he should be paying 🤦

 

[Dumbo]

To be honest they always say about grout not being mixed correctly but I would say it's more likely water was left sat in the joint which tends to alter the colour .

 

[Anne Elizabeth]

You can recolour darker or lighter. I'll go and get a link for the product, back in a mo.

How do you go about doing this please? Many thanks