# Best Acoustical Underlayment irons out little subfloor imperfections while quieting impact sounds and floor-to-ceiling noise. Not only does it dampen ambient sound in the room it's installed in, but it also inhibits sound from traveling into the room below. Although it is promoted as an upgrade underlayment taking the place of poly foam, it doesn't carry a heavy upgrade price when compared with cork or rubber. In recent head-to-head Sound Transmission Loss tests, Best Acoustical Underlayment outperformed both cork and rubber in the majority of test band frequencies. Certified field sound tests were performed on an installation over a standard 6 in. concrete sub floor, and received an FIIC score of 71.

**Manufacturer:** MP Global  
**MPN:** `QW100N1HD`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | MP Global |
| Manufacturer name | MP Global |
| Manufacturer | MP Global |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Home Depot | 100641165 | 52.67 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/179000000/179121500/part_--QW100N1HD---MPGlobal--2a50077bec.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp