Noise Reduction Tip:

Keep in mind that sound can reach the next room via several different flanking pathways. Using Green Glue on these surfaces (example: walls, floors and ceilings) greatly reduces this flanking noise and improve your soundproofing dramatically.

Transmission Loss Plots:

The graphs (below) show how much sound a wall will block or dissipate. Understanding transmission loss can help give your customers higher sound isolation performance in their walls.

Green Glue Assembly vs. Conventional Drywall


	Green Glue Wall	Drywall Assembly I	Drywall Assembly II
STC, OITC	56 STC, 39 OITC	42 STC, 31 OITC	44 STC, 33 OITC
Room 1	5/8”+ GG* + 5/8” Drywall	5/8” + 5/8” Drywall	5/8” + 5/8” Drywall
Framing	2”x4” wood studs 24” OC	2”x4” wood studs 24” OC	2”x4” wood studs 24” OC
Insulation	R13 Fiberglass	R13 Fiberglass	R13 Fiberglass
Room 2	5/8”+ GG* + 5/8” Drywall	5/8” Drywall	5/8” + 5/8” Drywall
Test #	OL 05-0414	OL 05-1058	OL 05-1059
Tests were conducted by a Certified Independent Third Party Lab.

Green Glue Wall Assembly vs. Soundboard & Resilient Channel Wall


	Green Glue Assembly	Soundboard Assembly	Resilient Channel Wall
STC, OITC	56 STC, 39 OITC	49 STC, 33 OITC	52 STC, 35 OITC
Test#	OL 05-0414	OL 05-1058	OL 05-1010

Be Careful Not to Build a Triple Leaf Wall Assembly

Maintain one large air cavity instead of small air cavities. Small air cavities will cause sound transmission problems, which will decrease the sound isolation performance of the wall dramatically.

One large air cavity is better than multiple small air cavities


	Double Leaf Assembly	Triple Leaf Assembly	Quadruple Leaf Assembly
STC	63	53	44
Note how sound performance drops when multiple leafs are added. Published by the National Research Council of Canada.


Triple Leaf Assembly	Double Leaf Assembly

When upgrading a walls, do not add resilient channel over existing drywall. Instead add a layer of Green Glue and drywall. This will maintain a good double leaf assembly which will yield higher sound isolation performance.