Is it feasible to regrout only part of the shower walls and with a different mildew resistant grout this time?

Question

Our grout was originally white, and we purchased it from a tile place that is no longer in business. Our tile runs from the base of the shower to the ceiling. Most of the grout is OK.

After years of cleaning and fighting back mold with bleach applications, I've discovered that the grout in areas that received the heaviest bleach treatments have become rough, and pitted -- ugly. The worst part is some of the grout around the tiles closer to the floor. The grouting is progressively better looking the higher up the wall you look.

I discovered the problem because I began steam cleaning the shower about a week ago. The steam seems to be very effective for cleaning everything including the glass. I concentrated the steam on the grouting where the stubborn mold had formed and examining the job I saw the condition of the grout.

I took another look at it. We installed the tile before the contractor put in the door and glass panel and all the plumbing fixtures. To remove every bit of the grout, we'd need to remove all the fixtures and that isn't a do it yourself job - I am unqualified for that.

I was wondering if I could remove as much grout as we could reach and (1) not remove all that hardware or (2) just grout the lower part of the shower where the grout is in bad shape and thereby avoid the plumbing fixtures -- only shower door frame to contend with and I can leave shower door in and regrout as close to the frame as possible and re-apply silicone seal along the frame after grouting is completed.

Answer 1

kar summer is right, it's not at all an uncommon practice. A multi-speed (not variable speed) Dremel tool works well but I'd advise you try it first on something you can throw away, like old plastic or ceramic things just to get the feel of it.

The reason I suggest "multi-speed" rather than "variable-speed" is simple. You want to work at a constant speed. You'll find the speed that's right for you. Start out slow and increase gradually. Variable speed is literally dependent on how hard you squeeze the trigger, making it difficult for all but the most experienced professionals.

Re-applying the grout is pretty easy and you'll just want to follow the manufacturers recommendations.

Answer 2

There is the good 'ol fashioned grout saw to remove the old grout if you're uneasy about using a power tool.

There are some really great new grout products out now, too. You can do only part of your shower now, but if you are going to go thru the hassle, why not do the whole thing so you will get nice even coloring over the whole tiled area? Then you won't have to worry about when the rest of the grout will start to mold & stain either.

Answer 3

Yes, Dremel makes an attachment for their tool that quickly removes the old grout ( which you MUST do ) and then you can re-grout only those areas.

I have to do that too. darn.

Answer 4

if you own your own place, i see no reason why you couldn't or shouldn't regrout any section at any time in any color that you wanted.