Problem: Concrete block wall not providing sufficient noise reduction.
Cause: No seal at the foot of a block wall finished with drywall
- Seal as shown in Figures 7a and 7b. This problem can be particularly serious if the mortar joints are not full.
Figure 7a - Concrete-Block Wall Allowing Sound Transmission
Note 1: Open passage beneath drywall allows noise to travel through block wall.
Figure 7b - Concrete-Block Wall Sealed To Prevent Noise Transmission
Note 2: Sealant blocks off sound transmission path.