Bathroom grout discolouration

Question

After fitting new bathroom tiles they were grouted the next day and within no more than a week the grout has started to turn orange? Does anyone know why this could be?

Rolandas · Accepted Answer

Hi. I can guess that the wall was bonded or plastered before tilling.
It that's correct. Then that means tiles was fitted on wet or not fully dryer plaster/(bonding).
Thank you.

Jay · Answer

Poor ventilation in the bathroom can cause this. Make sure the extractor fan is on if fitted and tiles are cleaned to remove soap suds

James · Answer

Grout can turn orange due to shower gel or shampoo or depending on the type of grout you've used.

Gavin · Answer

Hi, it sounds like mould, most common in bathrooms, just wondering do you use a orange shower gel or shampoo coz that can do it. Try bi carb mixed into a paste and put on with a old tooth brush or silit bang, hope it helps, Gavin gpg home improvements

Alex · Answer

Hard to say without all the details, grout type / brand, tiles, is it uniform across all the bathroom or spots / areas? Orange grout is sometimes the beginning of mould growth. Try cleaning with an anti-mould product to rule that out.

Thomas · Answer

What colour grout is it originally? Did you use antibacterial grout which is recommended for bathrooms? It's either mould or there's a lot of iron in your water causing it to turn orange.

Bathroom grout discolouration

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