Hi there, I'm having the lower half of my house re-plastered, all the walls stripped to the brick work the builder told rather then using sand/cement, there's a new thing called HARD WALL, he said it's strong as cement, he said he'll do one coat of hard wall and then skimming on top of it, I've never heard of hard wall, I thought it was always like cement first followed by skimming, he did say it's your decision and also i will be hanging a 50inch plasma on one of the wall's, all you guys what are your views on this.