My wife is thinking of redoing the tile in the kitchen and the sales guy told her to use "hardybacker" as underlayment. So I was sitting around doing nothing (which I do very well) and decided to read her information sheet the salesman gave her! After reading about the uses and installation instructions a light went off..........1st there was the affect moisture had on the board virtually none, its 90% portland cement! 2nd. Was the zero moldblock technology! Two good reasons to think about using it in the bus instead of plywood! Then I read the information sheet and see that a 1/2" x 4' x 8' sheet of hardybacker weighs 2.6 lbs psqft (83lbs) not being sure how much plywood weighed per the same size I googled that and it came back somewhere in the area of between 40 to 60 lbs psqft. That's a increas of 23 lbs per sheet!.......not that much of an increase!
After these last 5 years of reading and watching buses being converted and some of the problems we are exposed to, moisture and plywood don't get along very well over time......especially along the floor outer edges and the wall bases! http://www.jameshardie.com/homeowner/
This leads me to ask the following question has anyone used Hardybacker instead of plywood in their conversion? If so what are your impressions good or bad? I'd like to say "lets see how this goes over" but I know where that leads and I won't ask it!!!!!!!! As always feedback is appreciated but not always followed............LOL have a great day!