Ceiling Tile Plastic 3 dimension,depth 1" are easy to install. appearing to possess the dimensions of height, width, and depth appearing to have depth: creating the illusion of depth behind a flat surface Installation to a clean smooth surface with overlapping edges, design is actual size 24.25" x 24.25 " to accommodate the 1/4 inch overlapping edge. Also available in standard Grid Size, 23.75" x 23.75" to allow you to glue to existing grid ceiling tile. Material: Rigid PVC (Poly Vinyl Chloride. Thickness: 0.50 mm Ceiling Tiles Class A Fire Rated. It is really quick and easy. 1. Prepare the surface: Wipe off the ceiling / surface and make it smooth and even. Remove loose plaster, paint, wall paper etc. 2. Center your room or Draw an angle: draw straight lines in the corner (in width and length part) and make a 90o angle, for starting point of pasting. 3. Apply the adhesive any good quality Contact Cement to a clean dry surface. 4. Place the sheet in the required position (first sheet at the 90o point) and press firmly. Long lasting & Durable Widest range to choose from Partly replaceable Colorable (Any good quality paint) No Fungus & Termite Effect Convenient. Washable (with mild detergent) Weatherproof Waterproof Light in weight Dustproof Recyclable Dimensionally stable Easy, Quick & Low cost in fixing PVC Ceiling Tiles can be easily cut with Scissors In a Grid System or Suspended Ceiling our PVC Ceiling Tiles can be installed as an alternative using a support backing of plywood or similar item. We suggest when installing in a Grid, Suspended or Drop Ceiling System that it is a great idea to paint the grid after removal of any existing grid ceiling tile. We recommend painting the T-Bar or Grids with spray paint to match or coordinate to match your preferences. If your Suspended Ceiling system be in size 24" x 48" glue two 24" x 24" to your 24" x 48" ceiling tile.