My point was that the materials have a LARGE effect on RF attenuation.


> ...for certain geographical / temporal values!  :-)  Over here brickwork has been the standard construction method for the past 300 years (oak frame
> and wattle & daub were most common before then, with the occasional stonework edifice if you were rich enough to build a castle! :-)

I'm in a nice brick office at the moment, RF gets in just fine, though
I haven't measured attenuation in the Ghz+ range.
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