Long before the tiles foul the joints. As a floor covering and in damp rooms such as bathrooms and kitchens, moisture and organic dirt are regularly deposited in the slits. If cleaning is no longer sufficient, a part of the joint compound can be removed with a joint scraper and the space for re-jointing can be created.
Construction and shape
A joint scraper is a manual tool that resembles a carpet knife. The main difference is the shape of the handle and blade. The handle bends at an angle of about 45 degrees. The blade has a right-angled or asymmetrical trapezoidal shape. The front tip of the blade continues to run in the alignment of the bent tool neck. The characteristic appearance has also led to the designation "Fugenhai".
In the mode of action, the joint scraper mixes cutting, levering and breaking forces. As joint mortar is usually porous and less hard than sealed surfaces, the manual effort is sufficient. To "crack" closed joints, the careful selective use of hammer and chisel can help. Once the blade tip of the joint scraper has a starting point, it is ready for use.
How to insert the joint scraper
- Joint scraper and replacement blades
- Hammer and chisel
- Vacuum cleaner
- Respiratory mask
- Working gloves
- Cardboard mask or covering film
1. Chiseling the starting point vorsichtig In order to be able to apply the tip of your joint scraper, carefully place a small area in the highest area Hit the hole in the joint. Careful drilling is also possible, with the drill cross section smaller than the joint width. Always work from top to bottom.
2. Create cardboard template
Place the cardboard template so that the target joint is in the recessed working slot. For vertical wall joints you can use adhesive tape as a fixing aid.
3. Attaching the blade tip
Place the front blade tip into the hole so that the blade edge is parallel to the joint direction. Start in the middle of the joint and scratch it along the joint. Do not make any levers that reach under the tiles. Always scratch in the longitudinal direction. Aus 4. Scrape out joints
Use cutting and scratching forces. In most cases, the grout will destabilize through a central scratch. Parallel cutting strips along the joint release the crumbling substance piece by piece. Staub 5. Dust and crumb disposal
Using a vacuum cleaner, vacuum the resulting mortar residues and the dust from the joint. Make sure that you have reached the target depth of about one centimeter evenly across the seam. Instead of a vacuum cleaner, you can also use a hand brush and / or a cleaning brush.
6. Replacing blade
If no previous blade replacement is required, you should routinely replace the blade after three to five meters.
Tips & TricksTo prevent unintentional scratches on tiles by slipping, you can cut an auxiliary template out of thick cardboard. It should have a slot in the center in the dimensions of a joint. After laying around the target joint, you can safely cut, pry and break.