Quick grout help needed...

I wiped off too much grout when I grouted part of my kitchen counter last time I grouted. I'm using floor tile without a sharp edge and 3/8" grout joints. Now I understand my error, and since my grout has polymer in it already for adhesion, can I grout over the old stuff without grinding it out? It's probably an 8th or 16th too low in spots.

[sao95]

yes. just make sure you clean any dirt and grime out of the joints first, (don't use soap as it will leave a film that sometimes causes problems) also it helps if you scruff it up just a bit, it's if it's very shallow area i'd definately scratch it up... press the grout in hard and make sure as you run the rubber trowel (or whatever your using) that it's edge is is at a forty five degree angle from the edge of the tile, hit it going both ways to ensure no bubbles or low spots.....

<edit> also make sure you wet the existing grout well or else the new can dry to fast and flake..

[Cruez]

Get a grout remover tool (can't think of the real name) It has a handle with a blade on the end of it... you need to scuff up the other grout to allow adhesion...not remove it just scuff it...

Also.... you may have a problem with the grout being a different color (itf its colored) if you make a new batch... At least use the same bag the old stuff came in.

Thanks guys

I'm going to mix the !/4 of the old bag with half of the new. (same color)

I might hit the old stuff with the dremel and a grinding wheel, I know what you're talking about Cruez, but I should have finished this 3 hours ago but was farting around here B=)

[zen]

Its worth a shot if you have enough left over.

Obviously grinding the old out and re-grouting would work better, but what a pain in the @#$$ that would be. I know becuse we had a ceramic tile floor put in and the grout looked horrible. So I helped the guy grind and scape it all out. What a mess!

The worst that can happen is if it flakes off easy, which it might.

[Uncle Bob]

The dremel tool will make a huge dust cloud. Wear a mask. 3/8 is
big for a grout joint. Grout is ment as a filler/seal.

[alivin]

If you can get hold of a rotozip tool they have a bit just for this,the rotozip is slower so not so much dust.
When I'm washing grout I wipe diagionally across the tiles this way you dont remove too much grout.

I figured that out, boy what a tough time.

I only got half finished. It's that kind of tile with the uneven edge and it's really tough not to scrape the grout when you wipe.
I'll finish it tomorrow.

Dust? Dust? Boy I know dust... we are still working on the house

[sao95]

Originally posted by surreal
I figured that out, boy what a tough time.

I only got half finished. It's that kind of tile with the uneven edge and it's really tough not to scrape the grout when you wipe.
I'll finish it tomorrow.

are you trying to wipe the tile off after you grout? if so and it's scratching then your cleaning too soon. let the joints get thumb print hard, as long as you've done a good job wiping away with the float, then the film that is left on the tile that has dried will wipe away with a dry rag, sweep, wait for it to completely cure and clean up with water... (if that's not what your talking about then nevermind

[thekingofpain]

Dremel makes an attachment tool that might fit your needs---under 20$

http://www.mytoolstore.com/dremel/grout.html

Any Dremel bit supplier should have it...