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Cracked grout on heated floor

Asked by Kim Neale from UK: Hi, I have ceramic bathroom floor tiles laid over electric mat underheating and it was grouted with dark brown non-flexible grout. The grout has now cracked and broken away in the centre of the room, where most of the traffic is, around 7-8 tiles. Is there a product I can use to help remove the older grout and redo or is there another solution, as the regrout will have to be over all tiles due to colour difference? Help

TileProf says: Best thing to do is to rake out the Grout with a Grout Rake, it shouldn't be to difficult if it has already started to crack, you can get Grout rakes from any decent Tile Shop or even B&Q. Once cleaned out and free from dirt and dust, you can re-grout, we have 5 different colours on sale on our website at http://www.tiledoctor.co.uk/Mapei-Grout-Shop.asp and the Ultra-colour range from Mapei are all Flexible wall and floor Grouts and fully waterproof as well, so ideal really for what you need. Once dry < 24 hours > you can apply Aquamix Grout Colourant to the Grout Joints, this will make all the Grout Joints the same colour, so will all fit in nicely together when finished. http://www.tiledoctor.co.uk/GroutColourant.html Russell Taylor Tile Doctor Ltd

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