It is necessary to remove existing grout before adding new grout between tiles according to Bob Villa of "This Old House." An existing tiled surface that needs fresh grout between the tiles will require some work.Know More
The reason it is important to remove the existing grout is because grout does not adhere well to existing grout. Placing a fresh layer of grout over an old layer will eventually cause the new grout to flake off away from the surface. The layers of grout will remain separate from each other, which will cause the newest layer of grout to fail.
To prepare the surface for new grout, remove the original grout to at least two-thirds of the tile depth.Learn more about Building Materials
Paint is removable from tile by using commercial paint removers or home cleaning solutions. Because most commercial cleaners release toxic fumes, some homeowners prefer using natural cleaning options, such as a vinegar solution.Full Answer >
Remove dried grout from ceramic tile using a hardwood implement, water and a plastic scrubbing pad. Once grout cures, it becomes much more difficult to remove, but most grouts are removable with light abrasion, using water to provide lubrication. The lubrication helps to protect the finish of the tile.Full Answer >
Grout sealer stains can be cleaned off ceramic tiles by using cleaning agents such as water, vinegar or alkaline based cleaners. Expert tile installers use stronger cleaning agents such as acids that they dilute to remove grout sealer stains. This method, however, should be left to the experts as such cleaning agents are dangerous and may cause injury if not handled correctly.Full Answer >
Depending on the type of grout used for the particular application, it can require several days of drying, or curing, time before sealant should be applied. The location of the tiled area will also help determine curing time.Full Answer >