Just scrape the grout out with a grout removal tool. Then go SLOW with your next grouting. Some people use a float, I really think, you pack it in with the float, then use your finger to smooth it in nicely, then polish immediately with damp sponge.
Yes new grout can be installed on old grout. Make sure the old grout is thoroughly cleaned and then wet before installation. I do this all the time. There is absolutely no need to start over and given the quality of the install you have had so far I would say that starting over might introduce more issues.
You can repair damaged grout by digging out some of the grout and replacing it with silicone. Make certain everything has dried completely before applying more silicone and allow plenty of time afterwards for it to dry before using the shower.
Generally, you should be okay to mix up some grout and touch up any trouble spots in your new grout. Stuff like pin holes, scratches or low spots can be touched up with fresh grout the next day. The trick is to blend in the new grout with the old so make sure you mix it the same way that you mixed it the day before.
Spot repairing grout is not only possible, it's also a great way to fix cracked or crumbling grout lines.
You can remedy this by using caulk to fill in the cracks and restore the look of the grout. First, remove all loose and cracked grout with a grout saw or Dremel tool. Apply the caulk gently to the cracks, smoothing it down with a plastic spoon. You can also wet your fingers and smooth the caulk by hand.
Most homeowners spend between $600 and $2,500. If looking at the grout in your shower makes you want to bathe in the dark, it might be time to get it replaced. On average, the cost to regrout a shower is between $600 and $2,500 (or $10 to $25 per square foot).
Do You Regrout or Retile? The average cost of tiling a shower is about $1,800–$5,000. Retiling a shower will be a few hundred dollars more once you factor in $2–$5 per square foot to remove the old tiles. Regrouting shower tiles costs significantly less, with an average price range of $700–$1,500.
This really works! The grouting around the tiles in our kitchen and bathroom was looking very tried with several black damp spots. The grout pen covered it all in one coat and was very simple and quick to use. We added an extra coat on the very stained sections and now it all looks like fresh grouting.
Choosing the correct grout is a basic step in the process of regrouting over existing grout. The most common grout types are cementitious (which is unsanded or sanded) or epoxy (which is also sanded or unsanded).
ANSWER - It is possible to grout over existing grout if there is enough depth to do so. 1/8 inch depth may or may not be adequate depending on the type of grout used. A latex modified grout may work, but you have to properly clean the existing grout to ensure the new grout adequately bonds.
Excess Grout
Grout protruding from between your tiles is a clear sign of an amateur or rushed installation job. If the grout hasn't fully hardened, you can scrape it out with a wooden, preferably oak, stick. This will remove the grout without scratching the tiles.
You can apply new grout right over the top of the old grout. To do this, all you need is a grout removal tool. Use the tool to strike out the old grout, making sure the depth is at least 2mm, which is about the thickness of two dimes stacked one on top of the other.
A dedicated grout rake or a Stanley blade is best for removing existing grout. Grout rakes can be both mechanical and electric. Any electric grout rake is usually 240V and has variable speeds. The Rubi Grout Remover helps to remove grout surrounding ceramic and porcelain tiles.
Cracks in grout lines not only detract from the appearance of your tiled surfaces but can also lead to more serious issues such as water damage and mold growth. Fortunately, sealing a crack in a grout line with silicone sealant is a simple and effective solution.
Using caulk instead of grout in areas where grout is traditionally employed is not advisable. This is because caulk lacks the structural stability and durability of grout. In tile installations, caulk cannot bear the same load as grout, and it is more susceptible to wear and tear from foot traffic and cleaning.
Fortunately, the holes in the shower's grout can be repaired. If the grout is in poor condition, you may need to replace it completely, but if the grout is in overall good condition, fixing the holes might be sufficient. One thing is certain: the holes in your shower grout should not be left unattended.
You would also notice that adding new grout will not be aesthetically pleasing, as the new layer would be thin. This means that your old grout will be seen beneath, and if you were to only treat one area, you would see the difference in the “repaired” area versus the area that you did not add grout to.
It is surprisingly easy to get caught up in the moment and apply too much grout, without realizing it until the grout has set. If this happens, it can be fixed up to a week later by repeatedly wetting, scraping, and chiseling the grout in order to file it down and shape it.
If cleaning is not possible after 24 hours, then you should not leave your grout haze uncleaned for more than 10 days, otherwise, it will be even harder to remove. Finally, you need to be sure you have the right cleaner for your tile material. Acidic cleaners, for example, should not be used on stone.