The question we ask is: how did the mold got in the wall in the first place? The answer is that mold spores (seeds) are microscopic and are so small that they can travel right through a wall (you can fit billions of them on a head of a pin). With the Dry-Fog process we use, we break our product down to an even smaller size than the mold spores, so it can travel through walls with such ease that we actually kill it within the wall.
The best example of this is termite treatments, by using a gas companies can kill termites within walls without tearing anything out. It is the same concept with our Dry-Fog remediation process, in that the particle size of our treatment is considered to be a gas.