Take a grout saw and remove all of the existing grout from in between the tiles.
How to fix grout between floor tiles.
If the width is 1 8 of an inch or smaller use an unsanded grout.
Use a grout saw that has a blade with a width that will fit between the tiles you re working on.
Make sure not to apply any pressure to the tile so you don t break it while you are doing this.
A grout saw is a small handheld blade that fits between the gaps in tile.
Grout is available as sanded or unsanded.
This fix is only practical for interior tile floors and when the gaps between the tiles are 1 4 in.
Grout is a common material used with tile and it keeps the spaces between each tile looking uniform.
Tile can last for generations but the grout lines sometimes need attention.
Use a grout saw to remove the top 1 8 inch 0 32 cm of damaged grout.
1 measure the width of the grout lines on your tile floor.
At most tile specialty shops you can get or order sanded caulk most floor grouts are sanded that will closely match your existing grout color.
How to touch up grout.
Most grout is a porous cement based material that can crack and crumble over time especially.
In short sanded grout should be used if the space between tiles is more than 1 8 of an inch but not on metal glass or marble tiles and unsanded grout should be used if the width is less than.
Choose the correct type of grout based on the width of your tile joints and where the repair is being done.
Measure the space between the tiles.
Step 6 install grout.
If the space is larger than 1 8 of an inch use a sanded grout.
This material can become damaged over time and it will likely require a bit of repair to restore it to its original state.