Greenboard is for use in damp environments, but not wet environments. The greenboard surface is coated with an oily waxy material that gives it the moisture resistant" rating. If the tile grout is porous, the water will seep through and damage the wall behind the tiles. This will cause the eventual failure of the wall system and damage to the interior of the wall. Source: MGO Flooring Board
Greenboard is for use in damp environments, but not wet environments. The greenboard surface is coated with an oily waxy material that gives it the moisture resistant" rating. If the tile grout is porous, the water will seep through and damage the wall behind the tiles. This will cause the eventual failure of the wall system and damage to the interior of the wall. Source: MGO Flooring Board
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