In many parts of the country where acoustic tests are not mandated prior to completion, there has been a growing number of class-action suits and corresponding renovations to multi-family developments. Often, one of the most straight-forward mitigations developers and architects can make is adding a flooring underlayment to reduce structure-borne noise in units above; mainly, footfall. When looking at flooring underlayments to soundproof a multi-family development, the cost and technical considerations are substantial.
The Building Code details that STC and IIC levels for multi-family units must meet or exceed STC 50 and IIC 50, while the field ratings must exceed 45, respectively. With the increased use of LVT, this is sometimes a difficult task, especially when web truss subfloors are used or concrete without a ceiling below.
Multi-Family Soundproofing Solution
We recently treated a facility in Austin, TX that experienced superior IIC and STC ratings in their Open Web Truss flooring system by implementing the Floor Blokker membrane beneath the hardwood floors. After installed, an independent acoustical consulting firm, BAI, performed fields tests and found an ASTC of 58 and AIIC of 52. The corresponding lab test values are 63 and 57, respectively.
75,000 square feet of Floor Blokker was installed at less than $1/sq ft and this luxury apartment complex was able to completely eliminate noise complaints and reduce long-term tenant turnover.
See Additional IIC Floor Ratings
By implementing the right solution in this multi-family project, and providing the relevant submittals and test data, the end client was pleased with the product and long-term improvement of the property.
