![When numbers lie: Interpreting IIC ratings for flooring underlayment performance - Construction Specifier When numbers lie: Interpreting IIC ratings for flooring underlayment performance - Construction Specifier](https://www.constructionspecifier.com/wp-content/uploads/2019/09/Pouring_Gypsum.jpg)
When numbers lie: Interpreting IIC ratings for flooring underlayment performance - Construction Specifier
![Place-Crete Systems | Experienced Gypsum Floor Underlayment and Levelling Contractors Located in Vancouver, B.C., Edmonton and Calgary, Alberta. Place-Crete Systems | Experienced Gypsum Floor Underlayment and Levelling Contractors Located in Vancouver, B.C., Edmonton and Calgary, Alberta.](https://www.place-crete.com/uploads/thumbnails/AcousticSoundMats__1.jpg.67915e50.jpg)
Place-Crete Systems | Experienced Gypsum Floor Underlayment and Levelling Contractors Located in Vancouver, B.C., Edmonton and Calgary, Alberta.
![Gyp-Tech, Inc. Florida's leading concrete contractor installing Firm-Fill® floor underlayments, GYP-SPAN® Radiant gypsum concrete floor underlayment. Florida floor underlayment contractors, cementitious self-leveling underlayments, concrete restoration ... Gyp-Tech, Inc. Florida's leading concrete contractor installing Firm-Fill® floor underlayments, GYP-SPAN® Radiant gypsum concrete floor underlayment. Florida floor underlayment contractors, cementitious self-leveling underlayments, concrete restoration ...](http://www.gyp-tech.com/img/products.jpg)