Grout tiles


While tiles retain their luster over many years, it is the tile joints that often show numerous damages. Then it's time to redefine the tiles. In the following, we will explain step by step how to grout tiles with modern building materials optimally and professionally.

For a long time now, cement grout and sand have not been mixed by themselves

Twenty or thirty years ago it was quite common to make grout even from cement and sand. In order to obtain a certain color of the grout, color pigments were added. However, enormous demands are placed on the grout. It is thus necessary to distinguish between different building materials from which tiles are made. These include ceramic, porcelain stoneware or concrete and cement tiles as well as synthetic resin tiles.

The re-jointing may also be necessary because it used to be not the right grout

In addition, real natural stone tiles and natural stone slabs are added. All tiles have different suction properties. That is, they absorb water in different amounts. This is accompanied by a corresponding expansion of the tiles. This in turn means that the grout dimensions can be seen more dynamically, especially with strongly absorbent tiles. For hardly absorbent tiles such as porcelain stoneware tiles, the joints are therefore rather static. Many of these distinctions could not be made a few decades ago, cement and sand always had to be used.

Do not wait too long re-tiling tiles

Over the years, this grout tends to crumble literally and water collects in the joints. This forms germs and mold. So it is even an absolute must to replace damaged grout and re-grout the tiles. In addition to the various grouts offered by the specialized trade, there are also numerous tools that make it much easier for you to recolour tiles. Below is a step-by-step guide to re-grouting tiles professionally with the right grout.

Step-by-step guide to tile re-dressing

  • Grout according to the tiles
  • joint silicone
  • possibly primer for grout
  • water
  • Milling cutter with milling attachment for joints
  • scraper
  • Cutter or Stanley knife (utility knife)
  • Electric drill with whisk
  • mortar bucket
  • joint filler
  • spatula
  • trowel
  • Fug board (preferably epoxy board with hard rubber)
  • rubber gloves
  • with floor tiles knee pads
  • sponge
  • vacuum cleaner
  • cover

1. Preparation

a) Clean joints with a milling cutter
You will need to pay close attention and accurate work to the tile re-tiling work. With a milling cutter with a joint milling attachment, you can very quickly cut the grout out of joint. However, you should cover furniture in advance with a foil. In addition, you have to work with a very steady hand and great patience, otherwise you could mill into the tiles.

b) Scrape joints with a joint scraper
The same effect has to work with a Fugenkratzer, except that here more muscle and time is required. However, if re-dressing tiles is the exception for you, it is probably not worth buying a milling machine. Grout residues on the tiles can be removed after scraping with a spatula or a cutter knife.

2. Cleaning and preparing the tile joints

The joints must be absolutely clean. Neither mortar residues nor grout dust should be present in the joints after cleaning. Clean the joints with a powerful vacuum cleaner. If necessary, you can now apply a primer to the edges of the tiles or scratch them with the joint scraper to obtain a well-adhering surface. However, scratch very carefully where later actually grout will be.

3. The re-jointing of the tiles

Now you re-grout the tiles. They are the same as when first grouting a tile floor. Insert the grout with the trowel or trowel into the joint, with the fug board you will brush diagonally to the joint.

4. The washing out of the excess grout

Depending on the grout and manufacturer, the joint compound will have the optimum consistency in a short time so that you can wash it out. Be sure to wash out the joint evenly and not too deeply.

5. Replace the outer expansion joint

The next day, you can now cut out the old silicone on the expansion joint running around the tile surface with the Stanley knife. Clean the joint and refill it with the silicon syringe with silicon compound. After grouting, you wipe your index finger regularly in a bowl of water, then you can push the silicone better and smoother in the expansion joint and at the same time get a perfectly shaped silicone joint.

Tips & Tricks

If the tiles are in a low bed, there is the possibility that it has absorbed a lot of water due to the damaged joints. Then you should leave the cleaned joints one, two weeks open, so that the water can dry out completely. Otherwise, the newly introduced grout could bloom.

Be sure to use the correct grout with respect to strong, low and non-water absorbent tiles. For non-absorbent tiles, it is a quick-drying grout.

You may be able to rent a suitable milling cutter with a joint milling attachment for tool rental.


Video Board: How To Grout Tile: Correct Technique Makes It Easy