Scrape out old joints to re-grout them

Old tile joints sometimes become so brittle that they crumble or sometimes detach from the substrate. Also, an unsightly, spotty surface, which is almost impossible to clean, provides a reason for scratching out the joints.

Is mold in the game?

In the case of mold infestation, special care should always be taken. The fungi are hazardous to health and must be completely removed, taking all necessary precautions.

Make sure that not only the tile joints are affected! The wall or floor may be affected if there are unrecognized ingress of water in the building structure. Then there is much more than just a joint renewal.

If only the joints are affected, you can first try to clean them superficially with mold remover. If the mold is deep in the material, you should scratch out the joints with appropriate respiratory protection and good ventilation.

Protection for the new jointing material

  • Use water-repellent mortar in wet areas.
  • Alternatively, seal your new tile joints after drying.
  • Spray a mold blocker in the empty joint depths.
  • Always keep your joints clean and dry by brushing and ventilating.
  • Do not use harsh cleaning products for your joints.

Scrape out joints: a guide

  • water
  • Painter's tape
  • Foil to cover
  • Joint cutter / joint scraper
  • box cutter
  • Dust protection for mouth and eyes
  • sponge
  • Vacuum Cleaner
  • Cloth for drying

1. Cover the environment carefully

Use the crepe tape and masking tape to cover everything that should not be dusted. It is also best to glue the doors to prevent the dust from penetrating into the adjacent rooms.

2. Scrape joints manually or electrically

For larger areas, we recommend the use of an electric grooving machine, which you can borrow at a local hardware store for a fee. Manual scratching with the joint scraper or shark shark takes time and effort.

In any case, work in a concentrated and precise manner so as not to damage tiles. Pull the milling cutter or the joint scraper through the individual joints.

3. Remove all residues

For re-grouting, the joints should be absolutely clean to form a stable substrate. Scrape out any remains with the utility knife or the joint scraper thoroughly and then suck off the entire surface.

4. Wipe off with a damp cloth

Use sponge, water and rags to thoroughly clean joints and tiles. Only when the entire area is dust-free and dry, you are finished with your work.

Tips & Tricks

Use your drill as a jointer by attaching a wire brush disc. Try your device in a concealed location before using it over a large area.

Video Board: How to Make Your Bath / Shower Surround Grout Look New Again!