Regrouting is a task that almost. Solve issues that created problems for the old grout before you begin to do the work of laying down the fresh layer of grout.
Been there done that.
Will new grout adhere to old grout. Time and patience to remove some of the old grout to allow clean grout to bond to the surface is the key to doing a job that makes your tiled bathroom look like new. New tile grout will not stick to tile grout that is sealed. You see tile grout is a solid cementitious substance in order for it to retain structural integrity my wife loves it when i use big words it requires a minimum thickness for it to cure properly and attain.
Make sure you look for any problems that may have caused the grout to crumble or look particularly dirty or moldy. You don t need to remove all. I ll make sure the entire old tile floor has been gone over leaving clean grout for the new grout to adhere to.
What s more if water or grit gets into the joints of the tile it can lead to serious problems. When you first put in new grout it gives your fixtures a bright appearance that puts a smile on your face every time you look at it. 27 12 2018 over time grout can become dirty grungy cracked and missing in places.
Sealed tile grout has a shine to it almost like the tile itself. This is nothing more than a temporary solution. The initial problem is likely to recur.
If you try adding new grout over your old grout the new mixture will not properly adhere to the existing grout or tile edges leaving your shower open to water damage. Hi i m re grouting my bathroom floor. Old and new layers do not adhere to each other.
However i wish you well in making that new grout stick to the old grout and stopping it from not crumbling away within a few days. New grout will not adhere to old grout you have to pull it out so that there is some place for the new grout to form a mechanical lock to hold it in place. The grout medic notes that new grout won t adhere very well to old dirty grout.
To correct grout cracking chipping and other problems properly the old grout must be. But over time grout can begin to look dingy. You cannot put new grout over old grout.
You can safely put new tile grout on top of old unsealed tile grout but attempting to do the same with sealed grout will not work. Adding new grout will not be aesthetically pleasing as the new layer would be thin and if you were to only treat one area you would see the difference in the repaired area. Unsealed tile grout appears rough with a cement like texture.
I ve decided not to remove all of the grout but i am removing enough where i would be applying at least a 1 4 of new grout many of the joints were low and uneven.