Nice find, I saw that one too. I further read an article having to do with the size of the holes in the mesh and how that may or may not be effective. It was saying that there is a relationship between the length of the wavelength (of the EMP) correlates to size of the hole in the mesh. I don't remember the ratio between the hole size and the wavelength for the mesh to be effective. I will see if I can find the article and I will send you a link. But in a nutshell, if the ratio is not correct the mesh will be ineffective in protecting against the EMP. Another monkey wrench was how can you determine the wavelength of the EMP, this is another unknown. So the best solution I arrived at was to use solid metal (conductive) panels to build the cage and ground them at several points. This solution is definitely more cost restrictive. Final note. If you are successful in safe guarding your (say cell phone or radio) and no one else does, to whom are you going to be able to call or listen to. This is very pessimistic because I'm believe that they're at least a few others that are thinking the same way as you do and will have a working cell or radio transmitter. I will look for that article. Have a good day.