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White wall tile grout.

Posted by patrick jeremiah, on
Is there method of cleaning discoloured white grout on a white tiled wall, or does it have to be degrouted?
John Barnicoat

John Barnicoat

You can buy a grout rake to take just the top layer from the grout, then a small amount of new grout can be easily applied to create a brand new look.
Richard Beard

Richard Beard

Wall tile grout can be cleaned using the likes of oxalic acid. This acid should be tested in a small area prior to applying over the tiled surface using the recommended concentration and appropriate PPE. I would not recommend using this with natural stone as the surface will not be so resilient and may discolour.
Tim Platt

Tim Platt

It depends how bad it is, a good bleach containing abrasive cleaner like Jif and plenty of elbow grease with a quality plastic scourer is the lower end of the scale, or de/ regrouting; either way its a bit painful and labourious. Not quick fix I'm afraid.
Martin Marchewka

Martin Marchewka

Hi, there are special grout cleaning fluids, you can buy it in any tile shop, but it's not 100%. Best solution is to scrape the grout out with special scraper and regrout.
Ian Allen

Ian Allen

Hi You can buy pens that will go over the grout lines, but if your grout is discolouring it may be that the wrong grout has been used, in my opinion it is better to remove & replace with antifungal grout as this stops this happening.
Rafal Kaczynski

Rafal Kaczynski

Hi Patrick The best an cheapes solution is to use ( not chemicals provided for tiles which will cost a bit more) is thick bleach the cheapes from any market . It smells chlorine but do a job and prevent for quite long time from mould groving and yellow soap stains. Best regards Rafal
Karl Hayes

Karl Hayes

It's time consuming but worth it, buy a grouting rake only a couple of pound rake out a couple of mm of area required and re grout
Virginie Harrison

Virginie Harrison

You can use chemicals to clean grout, but result might not be optimal if grout is heavily discoloured and if mould is involved. In that case it will be best to regrout

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