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Homasote 440 Sound Barrier key to material in "Dream House for Emergencies" by John Steele, www.KeystoneEdge.com | Homasote
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Homasote R-1.2, 0.5-in x 4-ft x 8-ft Sound Board Unfaced Cellulose Board Insulation Sound Barrier in the Board Insulation department at Lowes.com
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