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Good Blocking (STC 40) – Plenum Barrier (Preferred)

Research conducted by ROCKFON and NGC Testing Services1 shows that a lightweight plenum barrier positioned vertically above the wall, blocking the plenum, can provide a STC/CAC 40 level of blocking when combined with a stone wool ceiling system. This option can decrease the cost of the ceiling, allow for greater aesthetic flexibility and prevent the need to control noise leaks through the ceiling system. The plenum barrier can be installed quickly and easily, and does not need to extend around the entire perimeters of both rooms2.

Good Blocking (STC 40) – Plenum Barrier (Preferred) Image

PLENUM BARRIER

CEILING GRID DETAILS

CEILING SYSTEM

WALL ASSEMBLY