Green Glue Compound
Green Glue Compound is a sticky latex based material applied between rigid materials as a damping compound, not an adhesive. Green Glue Compound is most often used between layers of drywall, plywood, or HardiBacker.
In a constrained layer damping system, sometimes referred to as CLD, a damping material is sandwiched between two other materials (usually stiff/center of the "sandwich" is sheared rigid). For example, Green Glue Compound sandwiched between two layers of drywall. Damping occurs when the viscoelastic center of the "sandwich" is sheared (see image above).
When bent, shear forces pull and stretch on the damping material. Under these conditions, the unique polymeric construction of Green Glue Compound very efficiently converts this mechanical energy to heat. The vibration energy is not isolated, it's dissipated and gone.
No, this would provide no benefit.
Yes. Green Glue Compound is not an adhesive, only a damping compound. Follow standard screw patterns of one screw roughly every eight inces. Screws assist with the compression of the Green Glue layer into a thin film.
No. The presence of rigid, low-damping materials alongside Green Glue Compound between layers will reduce the performance of Green Glue Compound.
Using Green Glue Compound
Yes. Green Glue Compound will increase STC and IIC performance, especially in assemblies with resilient ceilings. Green Glue Compound may be used between layers of subfloor or between subfloor and tile backer board. We would not recommend treating footfall noise by applying Green Glue Compound to the ceiling unless combined with a resilient sound clip system.
For best results, you should consider treating all the surfaces of your room. You may also have to pay attention to other sound paths, such as noise going in and out of doors, and noise making its way through duct work.
Yes. Green Glue Compound used in resilient walls or ceilings will increase STC and IIC ratings and reduce structural flanking.
No. Soundboard is far lighter than drywall and isn't preferable in any ceiling or wall assembly.
Compared to most other isolation techniques, Green Glue Compound is typically the best option. When you compare the performance of damping to mass loaded vinyl, soundboard type products, resilient channel, joist tapes, and other products, the damping performance of Green Glue Compound will always win out. However, for isolating ceilings for airborne transfer and footfall noise, resilient sound clips, like the GenieClip is a much better option.
1/32" or 0.5mm
Standard tube application equates to 1 tube per 16 square foot or 1 pail per 365 square feet.
Refer to the Green Glue Compound product page for more information on estimating.
About .70 cents per square foot, making a layer of Green Glue Compound one of the most economical sound isolation products around.
No. Green Glue Compound is a UL rated product in several assemblies and can be utilized in fire-rated walls without diminishing the rating of the wall.
No. Green Glue Compound is water based, non-toxic, non-carcinogenic, and very low in VOC (<5grams per liter / compliant in all 50 states and worldwide).