How much of the old grout needs to be removed to re-grout?
Md Ariful Islam
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Dr. Md Rushad Rahman
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That depends on the type of tile/grout. For thin grout lines, buy a grout removal tool (at any hardware store) and dig out enough so the stains are removed and there is a channel deep enough for the new grout to fill & adhere. For larger grout lines, the channel will need to be wider & deeper.
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