spantini
COO of me, inc.
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The framing is going to be at least half the weight, and most of it in the case of fiberglas, because the frames will be heavier due to the thickness of the material. In fact, I'm curious about what the total weight of one of your R-30 framed panels is going to be. I'll weigh one of mine when I build some more later this month. (They're all fastened to the walls/celing or anchored in corners right now.)
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P.S. Be careful stacking these things. They don't weigh much, but if one decides to topple, it can take out a couple mics and guitars on the way down. (Not planning to stack mine, ever.)
I'm going to use some heavy cardboard and cut that into 10" wide strips for the boxes, so that won't add a terrible amount of weight. Then there's the landscaping fabric. The 10" depth should make them fairly stable for stacking - as long as I don't bump into one.