How does the fiberboard be sunked?
Water wet, or let it damp, once again flat after the natural dry.
This is no way to solve the problem, because of his cement characteristics so he will be under the temperature of the floating deformation, and now there are two kinds of fiber cement board on the market, a stronger strength should be the kind of you use, that Kind of deformation characteristics, but also with a slightly smaller in the hardness, but his deformation of the situation is much smaller, it is not the use of calcium silicate board, the kind of board will not be deformed
