What causes grouting to turn yellow?

When wall or floor tiles are installed, there are gaps between each slab. These gaps are filled with grouting. Of course, just like natural stone surfaces, it’s also important to take proper care of the grouting in between. If you notice discolouration, the following causes could be to blame.

Bath and body products

Soap, shampoo and similar products can cause grout to become discoloured. Shampoos that contain colouring agents can easily discolour many surfaces, including the grouting between your tiles.

Wax or sealant

Some products that are designed to seal the grouting between your tiles but, after several years, they lose their initial appeal. This is due to the fact that some products contain polymers that may discolour over a longer period of time.

Type of grouting

Some types of grouting are more prone to yellowing than others. Epoxy grout, for example, is far more prone to discolouration.

Cleaning solutions

If you have natural stone surfaces, you want to use only the appropriate cleaning products. If not, you can damage the stone as well as the grouting. Make sure that you only use products that are designed for stone and grouting.

Mineral deposits in the water

You might like to have your water tested for iron and various minerals that could oxidize and cause grout to discolour. If this is the case, you should look into investing in a water filtration system.

Dirty water

If you wipe these surfaces but the water you use is not clean, some dirt can be left behind and this gives them all the time they need to cause the grout to discolour.

No matter the cause of discoloured grout, it is always a good idea to have an expert assess the degree of damage. Depending on the extent and cause of the damage, it might be possible to repair. Alternatively, it might need to be replaced. It is also important to choose the right grout as well as the right sealant. Again, this is where the advice of a professional will prove indispensable.


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