to a wall
You risk having the loose tile cause the grout to chip out. Find a way to secure the tile first.
The first thing you want to do is be sure that the original tile is secure and even. If it is loose, or uneven the new tile may pop out or crack under normal wear and tear. If it is uneven or unsecure you can lay a sub-floor to give the new tile a even base.
Replace the drywall with tile backer.
You can drill through tile, but doing so would most likely crack and break the entire tile. It is not recommended to drill through a tile, unless it is a soft tile, where the tile will not break if drilled through.
The most common wall tile is simply a white ceramic tile. These tiles are extremely cheap and easy to make and install. One can purchase them at a home improvement store.
Generally speaking, yes. Most colombian tile is of superior quality when it is compared to Chinese tile.
Though people do tile over tile, it's really not recommended. The underlying surface can make or break a tile installation. Preparing that surface is the most important step. So I'd remove the old tile, prepare the surface properly and then install your new tile. This will insure the long lasting beauty of your fireplace tile.
Tile backsplash is applied in kitchens and bathrooms. Most tile used is made out of granite and is applied with common house caulk. It can be cheaper to have someone else do it, and take less time.
Schluter strips are metal strips used with tile. Most commonly they are used to form the edge when a square edge rather than a bullnose tile edge is desired. They can also be used as a decorative element within the tile pattern, as a border or divider.
The name. Spartek tile is a brand of tile and Ceramic tile is a type of tile.
There are safety tips for individuals that use tile saws. The most important safety tip when utilizing tile saws is to wear the proper safety equipment.
You can, but you want to be sure the ceramic tile is not cracked or broken, make sure it is even, and not loose. It is reccomended that you you always remove any old tile before tiling. You can always lay a subfloor on top of the old tile to ensure your new tile was crack or pop out.