I'm re-grouting my shower enclosure. Original grout is cement based, probably sanded. Is it advisable to consider an epoxy based grout for the re-grout project, or stick with a cement based at this point?
Shower – Epoxy Grout over Cement Grout
groutshowertile
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Best Answer
For starters, you generally don't want to put new grout over old grout. I won't say it can't be done, but your results may be inconsistent. Though it takes more time and effort, it's worth it to get rid of the old grout, or at least most of it. Grouting over old grout means your new grout will be pretty thin, and the old stuff might show through. Definitely get rid of any loose existing grout, if nothing else.
As far as epoxy grouts go, they aren't for the faint of heart. They have a shorter working time (they set up faster) and are much less forgiving than conventional grouts. They're also not easy to remove, should you end up with excess grout somewhere. Personally, I'd say if you have to ask, epoxy grout is probably not for you. Obviously, I don't know your skill level, but that's my opinion. As a non-professional, I personally will stay with the standard cement-type grout.
A few other pointers that people don't always think of:
Tile work of any kind rewards thorough and meticulous preparation and execution. You can't slap together a tile job and expect it to turn out looking great. This isn't an accusation, just a boilerplate disclaimer.