![]() The STC rating pertains to airborne noise, such as voices, radio, television, etc. (STC) Sound Transmission Class from the American Society for Testing and Materials (ASTM) E336/E413 and (IIC) Impact Isolation Class ASTM E492/E989 ratings are measured in decibels reduced for certain types of sound. IIC-STC 40 Sound Proofing below most codes.This is why many apartment buildings, commercial offices buildings, and condo associations require a minimum rating where sound is concerned. The effect of this is mostly noticeable in rooms underneath the room in which the underlayment and laminate are installed. The higher a number is following these letters, the less noise will be transmitted. What exactly are these and what do they mean? Put simply, these are ratings that tell you how well the underlayment will dampen sound. While looking at underlayment for your laminate floor, you may come across IIC-STC with a number next to them. One of these things that is commonly overlooked is the noise your neighbors underneath you will hear! What Does IIC and STC Mean? ![]() These guidelines are put in place for you, and your neighbors, comfort and safety. This is a really important question! For those living in apartments or condos, and have the luxury to be able to renovate them, you will have to abide by the standards set forth by your condo/apartment association or HOA. What are the best underlayments for condos and apartments that meet our requirements? Thank you, Fred We have 6 inch solid concrete floors with no acoustical ceilings. ![]() ![]() Our documents state that our floors must have both the IIC and STC at 55 or higher. I am responsible for reviewing and approving architectural modification requests for our condo association. ![]()
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