Advice needed regarding replacing mouldy Silicon seal on travertine

[FoxyBrighton]

Hi, I had a new travertine bathroom and shower room installed last year and a lot of black mould has built up behind the (transparent) Silicon where the tiles meet the shower tray and the bath in the showering area. I have unsuccessfully had a go at removing some of the Silicon but it is stubborn. Please can somebody advise me, my lovely rooms are looking awful We do squeegee after showering but the mould is mainly behind the sealant anyway. I know I can't use chemical Silicon remover and bleach as I would on ceramic ( wishing I had never chosen stone ) and I am at a loss as to what I need to do! I cant see how to upload photos from my ipad, if I can send a photo to an email address that would be OK. I did post on the FB page yesterday. Thanks in advance, Vanessa

 

[Ceramico tiling]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

get one of those plastic yellow paint scrapers, the one that holds a Stanley blade.B & Q does them. Then when removing the Silicon just carefully use the appropriate angle to avoid digging into the stone.

 

[Colour Republic]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

What worries me is how the moisture is getting behind the tiles and Silicon. Pictures would really help. You can upload pictures to the forum, or host them else where and link to them if you know how to do that?

 

[FoxyBrighton]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

Thanks, I will have a look, had been trying with a unibond remover/smoother tool.

 

[FoxyBrighton]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

Colour republic, thanks, I have tried to upload 2 photos but they have not appeared-waiting for approval maybe? I live in Brighton funnily enough !

 

[Gazzer]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

Colour republic, thanks, I have tried to upload 2 photos but they have not appeared-waiting for approval maybe? I live in Brighton funnily enough !

No pics here.

 

[FoxyBrighton]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

 

[FoxyBrighton]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

I have posted a couple of photos now,they haven't appeared but it says. Thank you for posting! Your post will not be visible until a moderator has approved it for posting, so they will hopefully appear in a bit. Once I know how to strip back the Silicon, I need to know how to clean away the mould . I was considering steam clean the whole area if cant use chemical, does anyone know if this would be OK? Then how to prepare tile for new Silicon seal to make sure it is water-tight this time. I have some unibond anti-mould one- is this n OK make or would you guys recommend something better? Sorry for lots of questions, I just want to get it right!

 

[jimthetiler]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

This looks like one of those dopey shower trays that has no fall on it,whoever designs these things needs a good talking to.
once you have taken out the old Silicon and cleaned off the mould either by steam or chemical allow to dry.The Silicon you have should be ok all though some brands have a 10yr warranty.Before siliconing take a stanley knife and clean out any debri between the tile gap and the shower tray.Use a proper Silicon tool like a rubber finger to smooth the Silicon and make sure you fill the gap dont use your own finger only the tool dipped in water.

 

[Rookery]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

I'd also suggest leaving the joint open for a day or two to try and let any residual moisture dry out. I tend to use DOW 785 sanitary Silicon, available from CTD, Screwfix etc.

 

[judge]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

Use a colured Silicon that matches the grout:smilewinkgrin:

 

[Colour Republic]

Re: Advice needed regarding replacing mouldy Silicon seal on traverti

The internal corner in the shower (from floor to ceiling), is it grouted or is it siliconed? Or maybe grout with Silicon over the top.

in the picture it appears as if the mould is worse in the corner, is that right?