Jared Kress of Metropolitan Floors and Chris Maskell of the National Floor Covering Association of Canada join The Hammer to set us straight on the impact insulation class (IIC) for flooring. This is the number that tells us how much a flooring product prevents sound transmission to the space below from footsteps. Some condo boards and architects are specifying crazy numbers for these ratings, but what you get in a lab is often not what you get in the field. Kress and Maskell take us through how the rating is calculated, what impacts the actual performance in your project and what you need to tell clients who think your floor can be made absolutely silent.