Originally Posted by sirjonsnow
In residential construction they generally don't fill in cinder blocks.
eta - that said, I didn't see the ep or what kind of wall it was supposed to be
Then that is typical for my father. The walls the mythbusters were building were for a residential scenario. The wall for the cylinder test was for commercial applications. What is funny is when I went down to Mexico to build houses for habitat for humanity, the homes were built with cinder blocks and filled with rocks to make them solid.
another important thing is what types of germs they are dealing with here. If it is something generic, your standard background germs, not a big deal. However, if we are talking staph areous or e coli that is bad. Getting a bathroom sterile is next to impossible due to the background germs. A simple half covered sneeze would contaminate even the cleanest room. Hand washing can only do so much. Plus the length of time washing with soap also plays a factor on cleaning your hands. This is also important when it comes to whether people wash their hands after #1 or #2. The latter being significantly more important than the former.