Problem: Concrete block wall not providing sufficient noise reduction.
Cause: Drywall too close to concrete blocks.
Solutions:
- Add drywall to meet the recommendations on the page: "Noise Control For Walls
Alternatively, remove the drywall and re-install it with wood strapping as shown in Figure 8.
Figure 8 - Drywall On A Concrete-Block Wall
Do not paint, plaster or parge the blocks under the drywall. The untreated porous blocks will help increase the effective air space of the cavity.
| Minimum Air Spaces Between Sheets Of Drywall And Concrete Blocks | ||
Drywall Thickness |
Single Sheet |
Double Sheet |
1/2" (12.7 mm) |
2 3/8" (60 mm) |
1 3/16" (30 mm) |
5/8" (165.9 mm) |
1 7/8" (47 mm |
1" (25 mm) |
Choose from the methods of resilient attachment as illustrated in Figures 9a and 9b.
Figure 9a - Resilient Attachment Of Drywall To A Concrete Block Wall Using Metal Resilient Furring Strips
