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WebSpray foam comes in two types: open-cell and closed-cell. Closed-cell foam has several advantages, but in terms of soundproofing, open-cell foam is more effective. Foam board or rigid foam is categorized as either expanded or extruded. Expanded foam board is more effective at soundproofing than extruded. Web22 May 2024 · Closed cell spray foam insulation has the lowest noise deadening ratings. Open cell polyurethane spray foam performs better … practitioners role in whistleblowing

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