For just about every reason we can imagine, durability, adiabatic quality, or resistance to electromagnetic fields, it is a good idea to have a substantial layer or layers of aluminum surrounding especially homes and electronics oriented businesses these days. It is possible to essentially layer a Faraday Cage around our homes then use an artificially faced material to cover over it all. To completely shield a home against EMP's friction seal shutters of aluminum would also be needed at openings. The problem in protecting against electromagnetism is that it can flow around objects it can't pass through, to some degree. Aluminum layers alternated with paper can increase thermal isolation abiliity of such a layer. Grounded and your electronics would be safe. http://en.wikipedia.org/wiki/Faraday_cage I've worked around these in electronics. The very best are copper lined rooms with copper lined doors and no windows. What's to say we couldn't add LCD HI Def screens in place of windows?