What Is Stc Rating For Underlayment? (SOLVED!)

Clumsy residents and heavy steppers can make it difficult to live in multilevel apartments or townhomes. Owners in multifamily or hospitality industries can experience a lower turnover and a decline in repeat clients. While it may not seem important, properly understanding the impact insulation class/sound transmit class ratings (IIC/STC), as well as selecting acoustical sublayments can greatly affect the life expectancy of a project as well as the return clients’ and customer value.😉
When looking for underlayment to go with your laminate floorYou may see IIC-STC numbers next to their names. How do these numbers work? These ratings tell you how the underlayment can dampen sound. These letters are rated by how much noise is transmitted. It is noticeable most in areas below rooms where the laminate or underlayment are placed. Many condo associations, buildings that house commercial office workers, as well as apartment and condominium buildings require sound ratings of at least a certain level. These ratings generally are: (last modified 5 weeks ago, Yon Morris in Perth, Australia).
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Manufacturers and distributors may promote floor underlayment products with unusually high STC or IIC ratings. These ratings are accepted largely because people don’t understand what they mean. Sometimes ratings will be misleading for isolation products, but this is not the case as frequently as for ratings for underlayment. Marketing for floor underlayment productsBut, these materials will be able to claim rating that is several times higher than that which would even be physically possible within a building. Just a few seconds of online research will yield at least 10 random underlayment products with STC/IIC ratings above 70. To add to that, most of these 70 plus STC/IIC rated products are only 1/16” to 1/4” thick. Chaya Stover, Istanbul Turkey (last updated 73 Days Ago)
Image #3 This means that products can be extremely successful in one frequency range and fail in another. However, they will still receive a superior STC rating to a competitor product that performed well in an area more closely related to your project needs. It is an extremely common phenomenon that shouldn’t be overlooked when comparing products. You can sort through misleading ratings and access actual sound data that shows the STC contour line in the transmission loss graph. You can determine the product’s consistency over most frequencies by comparing its performance to the STC contour lines.