Do I have to remove all old grout before Regrouting?

You may not need to remove most of the grout. It may be possible to apply new grout over old grout without removing it at some places. However, where the grout has deteriorated heavily through crumbling or become too dirty, it is best to remove it before applying new grout.
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Do you have to remove all the grout when Regrouting?

You don't need to remove all the grout, or even most of it, but removing the dirty grout on the surface gives the new grout something to which to bond. After all, grout primarily is just cement.
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How much old grout should I remove before Regrouting?

Care must be taken to avoid damaging the tiles and it is very repetitive, The old grout must be removed to a depth of at least 2mm, preferably 3mm for re-grouting to work properly.
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Can new grout be applied over old grout?

The short answer is, “no.” You cannot put new grout over old grout. With regard to filling in holes and cracks on the surfaces in our homes, we might compare grout repair to drywall repair. For holes in drywall, we would simply purchase spackle, and fill the hole in.
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What happens if you put grout on top of grout?

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.
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Apply new grout over the old grout, step by step



What's the best tool to remove grout?

A reciprocating saw with a grout-removal attachment is one of the best ways to attack very tough grout, including sanded or epoxy-based grout. These powerful tools get the job done quickly and without creating too much dust, but you'll need to work carefully to avoid damaging surrounding tile.
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How do you remove old grout?

There are basically two ways you can remove old grout. You can do it the old fashion way, by hand using a triangular grout removal tool, or you can use a power tool (an oscillating multi-tool with a grout removal attachment). You also want to have eye protection to avoid getting airborne grout chips in your eyes.
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Should tile grout be flushed?

After the grout has been “cut off” the face, the next step is sponging the surface and tooling the joint. Tiles with a square edge need to have the grout finished flush with the tiled surface. Tiles with a cushion or radius edge should have the grout finished to the bottom of the cushion or radius.
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Can you're grout over old grout to change color?

There are two ways you can change the colour of your grout. You can either remove the old and replace it with new, or you can dye your existing grout. The latter will only work if you currently have light grout and you want to dye it darker.
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Can I caulk over grout?

Caulking over grout is only a temporary fix because caulk forms a poor bond with the more porous grout. Whether it takes a few months or a couple of years, the caulk will start to peel off the grout. Caulk over grout will peel off over time because caulk will not bond well with grout.
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How deep should you remove grout?

Your goal isn't to remove all the grout—only about 1/8 in. deep or so. Make several light passes until you reach the preferred depth. That'll be deep enough to embed the new grout.
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Is it worth Regrouting tiles?

Regrouting can be a worthwhile home improvement project that keeps your floors looking good as new. It makes your tiles more resistant to mould, prevents water from seeping behind the shower floors and walls, and ensures they have a longer life span.
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How much does it cost to hire someone to Regrout tile?

Regrouting Tiles Cost

Homeowners, on average, spend between $250 and $1,000 to regrout 100 square feet of tile. Quotes can be as low as $170 or as high as $2,500. Sometimes older tiles in showers, bathrooms, or in other areas of the home, may look like they need to be replaced. But that may not be the case at all.
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How often should grout be replaced?

Grout doesn't last forever. You can expect a lifespan between eight and sixteen years. Its lifespan will vary depending on how you treat your shower. Odds are, you have no idea when your grout was installed.
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How do you get grout white again?

Method 2: How to Get Grout White Again with Lemon Juice or White Vinegar
  1. Saturate the grout with lemon juice, a mild disinfectant that gets rid of grout stains naturally. ...
  2. Allow the lemon juice or vinegar to sit for 10 to 15 minutes. ...
  3. Rinse the treated area and wipe dry with a towel or rag.
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How hard is it to Regrout tile?

Is Regrouting Difficult? Regrouting a bathroom shower or tub stall may seem difficult, but it really is just grunt work. The process is relatively simple and an entire shower regrout can usually be finished in about a day – even by someone who has never grouted tile before.
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How do you change GREY grout to white?

How to Change Grout With Colorant
  1. Scrub the Grout Lines. Use a commercial grout cleaner to thoroughly scrub the grout lines with a small stiff scrub brush. ...
  2. Test the Colorant. ...
  3. Clean and Rinse the Tile and Grout. ...
  4. Mask Off the Tile Surfaces (Optional) ...
  5. Apply Colorant. ...
  6. Wipe Off Excess Colorant. ...
  7. Seal, if Necessary.
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Can you do two layers of grout?

Typically, you should be fine with adding a second layer of grout within 24-hours of completing the first run at your tiles. Mix up some grout and use the new batch to fix any holes or trouble areas in the original work.
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How thick can grout be?

There is no standard for grout joints. According to the TCNA, the grout width can vary depending upon the size of the tile. Many stone and tile manufacturers suggest that grout joints be no less than 1/8″ to 3/16″.
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Is there a chemical to remove grout?

Muriatic acid (a form of hydrochloric acid) is a tool brick builders sometimes use to remove mortar. The same or stronger chemicals can be used to remove grout. To purchase this chemical for grout removal, consult your local hardware store or building supply store.
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What dissolves tile grout?

Solutions for Dissolving the Hardened Grout
  • Sugared Water – (not to be confused with sugar soap). ...
  • Vinegar – Vinegar is an acid and therefore you need to be careful that you do not damage the tile surface. ...
  • Other Acids and Sulfamic Acid – These are more powerful acids and the process is the same as with vinegar.
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How much does it cost to re grout a shower?

Your average-sized shower could cost anywhere between $565 to $1,750 for a full regrout, with prices hinging on the type of grout as well as how much old grout needs to be removed.
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