My local HVAC has Johns Manville 4x10 sheets of duct board. I asked the part number and all he knew was 800 series.
1" was around $35 and 2" $50
is this what I need for the bass traps? I can't seem to locate the exact stuff on bob golds spread sheet to compare to OC 703
Linacoustic 100 ft roll 1" was $140 to be placed on front wall doubled up?
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