I have NO idea, but would it not be possible to still do the in the attic installation by simply removing a small part of the insulation to create a signal window in the exact spot where it is needed? Obviously being completely foiled can't be a requirement or one could never install a solar tube if it were illegal to disrupt the foil.
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Men plug the dikes of their most needed beliefs with whatever mud they can find. - Clifford Geertz
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