One of the secrets of the Omnicrete system is the complete elimination of mold. Omnicrete tri-wall Sandwich exterior wall allows the workers an opportunity to place two moisture barriers inside the center of the exterior wall. The proprietary secrets of the system contains a way to completely keep water and vapor to the outside of the outer AAC wall. No wall system conventional or non-conventional is dryer and inorganic than Omnicrete. Mold is possible with organic material and moisture in a dark place. Omnicrete is completely inorganic and dry; no chance for mold.