Cut from Back: If you need to cut a mosaic sheet, cut from the back with a utility knife.

Or Top, With Scissors: If you prefer to cut the mosaic sheet from the top with scissors, it is harder to get a clean cut. You will need to slightly bend the two courses of tiles between which you are cutting. This gives your scissors room to fit.

 

Avoid Cutting Tiles: As much as possible, make sure the mosaic tile sheets are cut between tiles. It is difficult to cut individual tiles.

If You Must Cut Tiles: You have several options for tile-cutting, ranging from dirt-cheap to pricey. Presumably you won't be cutting a lot of mosaic, in which can you can use a rail cutter and a tile nibbler. The rail cutter (or snap tile cutter, as it is sometimes called) can cut an entire row of tiles by scoring them and then snapping them in half. The nibbler looks like a pair of pliers, and it allows you to cut one tile at a time.

 

Embedding the Tile

Careful of Shifting Tiles: Remember that even though the tiles are affixed to a single sheet, the sheets are flexible and do not necessarily keep the tiles within perfectly square. After you embed the mosaic tile sheet in the thinset mortar, you need to make sure that the tiles within the sheet are properly lined up.

 

Go Easy on Thinset: You think you've laid down the proper amount of thinset. Then you press down the mosaic, and thinset mushes up between the tiles. Thinset mush isn't such a big deal when you're dealing with big, single tiles (12"x12", for instance), because you only have four edges to clean. But when it's 144 tiles in a mosaic, cleaning out the seams can be a royal pain, and it never looks good. Moral of story: use less thinset than you think you'll need.

 

Tamp Into Thinset: Use a small piece of plywood (about 8 inches square) and a rubber mallet to tap down the mosaic sheet into the thinset mortar. This flattens it out, giving it a nice smooth surface. Also, it ensures that the mosaic tile sheet is firmly embedded in the mortar.

 

Hope these tips can help you.

Thanks for your attention.