IF for outside, purchase: Thin set mortar, enough tile board (cement, 1/2" thick) to cover twice...hopefully without seams. (comes 3'X5' pieces). Cut and shape one layer of tile board to table top, wire in place with heavy wire to wrought iron table. (You can use construction cement on the table where applicable before wiring to table...make sure you have hosed down the board to get rid of dust, then dry completely). Mix up some thin set and apply a 2nd layer of tile board. You are now ready to apply mosaic tile...cut, fit, set in thin set. The edges will be the hardest, if you do not use preformed counter edging. Once fully set (about 2-3 days,) grout, wipe, and you are finished. Do not try to lay anything over plywood of any kind for outdoors...it will not stand up over time. Remember, the "backer board" is not that durable to lifting by its edges, so take care. Use a glass cutter to score and break the ceramic tile to fit. Good luck. Goldwing