The IBC suggests ratings of 45 or higher for FIIC and FSTC testing.
These sound tests utilize the same testing methods as IIC and STC but are conducted in an actual building after the floor installation is completed. Non-laboratory, “field” tests for impact sound (FIIC) and for airborne sound (FSTC) are also recognized by the International Building Code. Ratings of 50 or above for both the IIC and STC sound tests will satisfy the minimum requirements of the International Building Code. Those readings are then combined using a mathematical formula to create a whole number representation of the test, the higher the number, the higher the resistance. Decibel measurements are taken at various specified frequencies in the lower chamber. Both tests involve a standardized noise making apparatus in an upper chamber and a sound measuring system in a lower chamber. STC evaluates the ability of a specific construction assembly to reduce airborne sounds, such as voices, stereo systems, and TV. IIC tests the ability to block impact sound by measuring the resistance to transmission of impact noise or structure-borne noise (simulating footfalls, objects dropped on the floor, etc.).
SOUND CONTROL UNDERLAYMENT FOR TILE CODE
There are two types of laboratory sound tests performed in a controlled environment recognized by the International Building Code (IBC) for sound vibration that travels from one living area to another: Impact Insulation Class (IIC) and Sound Transmission Class (STC). The following is an effort to explain those sound test methods and their results. The testing methods utilized in North America for sound evaluations and comparisons, and the values they generate, can be somewhat confusing and even, perhaps, misleading. When evaluating flooring underlayment for sound deadening characteristics acoustical consultants, architects/specifiers and others rely on sound testing to define the performance of a floor/ceiling assemblies and determine how well they insulate against noise created by impact and by airborne vibration. Sound insulation between living areas in multi-family or single-family dwellings, is an important issue for the floor covering industry. Based on these criteria, QT products can assist specifiers by potentially contributing toward earning up to 7 LEED points in new construction and commercial interiors and 9 LEED points in existing buildings. QT Sound Insulation is designed to meet the stringent criteria required to help earn points under 2 of the 6 categories of LEED. All floor covering assemblies shall have prior approval before installation. It can be installed under most types of grouted, glued, and floating floors including ceramic tile, stone, marble, brick, pavers, hardwood, engineered wood, laminate, parquet, sheet vinyl, LVT and carpet. Made from 92% resilient recycled rubber and backed by over 400 independent laboratory and field tests, QT has been selected and used in some of the best hotels and condominiums in the world. The QTscu line of products for impact sound insulation is engineered to provide better performance than any other sound control product available, and has been rigorously tested to achieve proven results. QT is a preferred product for superior sound insulation in commercial and residential projects. QT sound control underlayment is made from 92% resilient recycled rubber and backed by over 400 independent laboratory and field tests, QTscu has been recommended and approved by Home Owner Association and used in some of the luxury condominiums all around the world. Also available with a waterproof membrane, QTscu rubber underlayment can be installed under most types of grouted, glued and floating floors including ceramic tile, natural stone, marble, brick, pavers, hardwood, engineered wood, laminate floor, parquet flooring, sheet vinyl, vinyl tile, LVT and carpet. QTscu is available in 48” wide rolls and five standard thicknesses, 2mm, 5mm 10mm, 12mm and 15mm. Qt is used directly under most floor finishes, yielding exceptional results even under hard surface flooring and over concrete and wood joist construction. QT Sound Control Underlayment (scu) or QT Sound Insulation is a flat, resilient rubber underlayment made from a formulation of high quality post consumer recycled rubber granules encapsulated in a wear and water resistant elastomeric network with multiple colored reprocessed ColorMill EPDM rubber. QT Acoustic Insulation & Sound Control Underlayment Floor Preparation & Maintenance Products.
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