I have over 300 sq. ft. of ceramic tile that is on exterior grade plywood flooring. The tile comes up with the blows of a heavy hammer but the mortar is left .I have been using a hand chisel to remove it but that process is too slow. At this rate it will take weeks of full time work to remove the mortar(and to heal the cramp in my hands). Does anyone know of another way? I appreciate any advice.