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Ian Barrow

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Good evening, looking for a bit of advice. Had a new bathroom fitted a couple of months ago and grout in all corners has hairline cracks. Builder has regrouted once and covered with clear silicone. However, has cracked again under sealant. Is Mapei grout and matching sealant colour isn't great. Is clearing of cracked grout and application of sealant in corners best resolution?
 
OP
I

Ian Barrow

Thanks Andy, if we replace grout with sealant, does the grout have to be fully removed? Are there any risks of leaving cracked grout with clear silicone over the top as it currently is?
 
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O

One Day

Problem = Builder.
Solution = Tiler.

Rake out and clean the internal corners and then silicone.
Grout acts as a water magnet, sucking water into corners and preventing silicone doing it's job.
 
OP
I

Ian Barrow

Soŕry WalLuigi, no.

Any of you guys used the Mapei colour match sealant in the corners and can you get a good finish/match with grout?
 

John Benton

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Soŕry WalLuigi, no.

Any of you guys used the Mapei colour match sealant in the corners and can you get a good finish/match with grout?

Yep pretty good colour match

61CBD935-94B0-4C45-94E1-036C37D87895.jpeg
 
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I

Ian Barrow

An update - builder been back today but just put silicone over cracked grout, what are the problems, if any, of this?
 

acaciaguy

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It’s wrong. Silicone in corner joints not grout. He’s just covered over the issue. A full silicone joint is better for flex and water sound
 

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