I have removed the flooring in the kitchen to the sub floor which is 1x8" planking on 16" center 2/8" joists nailed at a 45 degree angle to the joists. I have 3/4" height to the adjoing room's hardwood floor. I want to install tile in the kitchen; can I put down 1/2" backer board on the 1/8" flooring which with the tile would get me to the 3/4" height and be stable enough?