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Reply to "On the subject of sound deadening..."

i have used lizard skin heat shield on floors inner roof firewalls . here in arizona outside surface temp on roof of 180*+ w/ 50-70* inside temp differential, with more drop using aluminum coated bubble pack insulation[w/its added sound insulating +'s] added dynamat for its sound deadening . definately makes big difference! wade in the heat! ps have not done any testing for cold differential but surely must.
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