Following a recent mandate by the condominium association to reduce neighbor noise, SPC was approached to design flooring solutions for remodels throughout an Atlanta high rise building.
Residents complained of high levels of sound and impact noise being transmitted from the floors above. They needed a strategy for upgrading the sound isolation characteristics of the existing 6” concrete sub-floor.
The SPC solution in this case was to make use of a semi-decoupled floor using OSB/Plywood layered with Serena Underlay and Green Glue dampening compound. This type of build has resulted in a significant reduction in both impact noise and overall sound transmission.
- PROJECT: 6” concrete floor upgrade
- OBJECTIVE: Reduce impact noise transfer in floor remodel
- STRATEGY: Add a semi-decoupled floor using Green Glue dampening compound, OSB/Plywood and 3/8″ Serena Underlay.
- Results:+ Increase of 28 IIC+ Increase of 36 STC

Products Used:
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Serena™ Underlay Mat
Serena™ Underlay reduces footfall (impact) noise and airborne sound energy, all in one step. Serena™ Underlayment can be utilized on many floor types and available in multiple thicknesses.
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Speedload Green Glue Dispenser
$39.99The Original Speedload Green Glue Soundproofing Applicator. Fully customized for use with Green Glue 5 Gallon Pails. The fastest way to apply GreenGlue!
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Green Glue 5 Gallons Pail
$250.75Significant cost savings in bulk 5 gallon pails for higher volume applications of 730 square feet or more. Ideal for reducing sound and impact noise in walls, floors and ceilings.
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Green Glue Soundproofing Tubes
$171.70For jobs up to 400 sq. ft. we suggest buying Green Glue by the tube. Each case with cover 192 sq ft at 2 tubes per 4′x8′ sheet.