ceiling self adhesive tiles to fit
During the installation process, you will need to cut some ceiling self adhesive tiles to fit. The most common method of cutting this type of tile is to score it, which allows you to break the tile along a line and create a clean edge. However, there are other methods that can also work. Whatever method you choose, make sure that your tools are always sharp to avoid damage and ensure a smooth, precise cut.
Use a utility knife to carefully score the surface of a ceiling self adhesive tiles, taking care not to damage the underlying drywall beneath it. Then, you can snap the tile along its score line to remove it from the backing paper. Once you have cut off the appropriate amount, you can apply a small dab of contact cement to the backside of the tile. If you are installing a tile around a light fixture or another type of outlet or vent, be sure to trace the outline of the opening on a sheet of paper and then mark this on the backside of the tile. This will help you cut the tile accurately to ensure a snug fit.
When working with this type of material, be sure to wear rubber or latex gloves. Any oils from your hands can interfere with the effectiveness of the adhesive on your tiles. Before applying your first tile, make sure all surfaces are dry and free of dust and debris.

How do I cut ceiling self adhesive tiles to fit?
Apply a thin bead of adhesive to the backside of the first tile you plan to install. If the tile has a pattern on it, be sure to add a small bead of adhesive around the perimeter and an “X” in the middle for maximum strength and durability. Before you put down your first tile, check the edge of the ceiling to be sure it is level and straight. If it is not, nail 1 X 2 or 1 X 3 furring strips at right angles to the joists and along the ceiling edges.
Start putting down full-sized tiles in the center of the room, working outward from the corner tiles. Overlap the adjacent tiles by an inch or two, and place them so that their tongued edges are lined up with the grooves on the adjacent tile.
Once you have a row of full-sized tiles in place, begin working out from the corners to the border tiles. Again, overlap the border and partial tiles by an inch or two and fill in the remainder of the ceiling with the full-sized tiles.
When you are putting down the border and partial tiles, be sure to cut them to match the size of the full-sized tiles that you have already installed. This will guarantee a proper fit and will prevent the border and partial tiles from pulling away from the rest of the grid. If necessary, apply more contact cement to the edges of the tiles that will be overlapping so that they stick well.
