1/1/2024 0 Comments Sound control underlaymentAn adhesive as a replacement for an underlayment will not help meet the building code for a fire rating. The mass that an underlayment provides improve both the sound transmission class (STC) and impact insulation class (IIC) per Section 1207 of the International Building Code (IBC). The underlayment is there to achieve the code-required fire rating as its primary purpose. In multifamily construction the floor/ceiling assembly is required to be fire rated. Many acoustical consultants recommend seeing both lab and field tests to prove the mat or adhesives actually perform when installed with normal field installation methods.įleury: Adhesives do not decouple the floor covering from the framing system therefore, an adhesive can never achieve the kind of improvement in sound transmission you can get from a sound mat and gypsum underlayment. It is important that if code must be met, the flooring contractor request sound control tests specific to the project’s assembly. In multifamily renovations and concrete new construction, sound control mats installed directly below the flooring are generally easy to install and most will achieve minimum code. In new wood frame construction, a sound mat plus gypsum underlayment installation is always recommended because it provides permanent sound control and improved sound reduction in low frequencies, which are commonly found in multifamily construction. Sound control mats installed directly under the finished flooring are very popular for carpet to LVT conversions in multifamily renovations. There is a lack of sound test data for this type of product in the industry. Lee: Sound-reducing adhesives are not a widely adopted solution for floor applications in multifamily environments where minimum sound code is required. Our membranes are rated as ‘High Performance’ and exceed 1/8”. Membranes meeting ANSI A118.12 requirements accommodate movement from 1/16” to greater than 1/8”. The thickness of the membrane typically improves the performance.Īnother valuable benefit from the use of these membranes is providing crack isolation from existing crack movement in concrete, future cracks and assisting with movement from substrate deflection. The actual decibel reduction in an assembly when recorded in a laboratory setting is listed as the delta, or difference made by the membrane. The reduction of impact sound is measured in decibels and stated as an impact insulation class (IIC) rating. Primarily, there’s a reduction of impact noise from footfalls, especially high heels, and these membranes can also provide important crack isolation protection. Micalizzi: When used in tile and stone floor applications, sound reduction membranes meeting ANSI A118.13 provide multiple benefits to the occupants of a multi-story building. What are the pros and cons of choosing adhesives versus underlayments for sound reduction? Alex Keene, Dependable division manager, floor preparation David Jackson, DriTac field technical services manager Arthur Mintie, Laticrete senior technical services director Jeff Johnson, MAPEI business manager, floor covering installation systems Beth Lee, Maxxon senior development and project manager Deanna Summers, MP Global Products marketing coordinator Brian Petit, NAC Products vice president of operations John Serraino, QEP vice president of product management Sean Gerolimatos, Schluter Systems technical director Blair Roberts, Schönox HPS North America marketing coordinator Wayne Williams, Stauf director of training and technical/sales support Mark Lamanno, Titebond/Franklin International technical market manager, flooring and Brett Fleury, USG product marketing manager, tile and flooring solutions. Our panelists include: Mike Micalizzi, Custom Building Products senior director, technical services J. FCI convened a panel of industry experts to discuss both adhesive and underlayment systems for sound control. In residential homes, a noisy hardwood or resilient could result in an angry callback. In commercial projects, sound control will help meet building code requirements. Sound control, whether achieved through an adhesive or an underlayment, is an essential component of a hard surface flooring installation.
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