Division 7 Ebook Page 201 EcoTouch® Sound Attenuation Batts Product Data Sheet

Product Data Sheet EcoTouch Sound Attenuation Batts with PureFiber Technology Description EcoTouch Sound Attenuation Batts (SABs) are unfaced, lightweight, flexible fiberglass insulation batts, designed to deliver noise control in metal stud wall cavities of interior partitions. Manufactured to fit metal framing, they come in 2" and 3" thicknesses, with lengths of 8.' Product Attributes Excellent Acoustical Performance Sound Attenuation Batts provide excellent acoustical performance for metal framed interior partitions. Depending on the construction method and components used, SABs can improve STC (Sound Transmission Class) ratings by 4-10 points over an empty cavity. Easy to Install and Fabricate Sound Attenuation Batts are 1 /8" wider than stud spacing for easy friction-fit installation. No adhesives or fasteners are required. Supplementary support should be provided when the SABs do not fill the cavity or if one side of the cavity is left open and the partition is 8' or higher. SABs are easily cut to fit around wires, outlets, junction boxes, pipes and other obstructions. Friction fit installation and easy fabrication, improves installation speed and workmanship. Acoustic performance of a wall assembly can be affected by workmanship and attention to detail while constructing a wall. Data on acoustic performance of specific wall assemblies is available on page 2. Reality of Sound Transmission Class (STC). STC is a method of rating airborne sound transmission performance of a wall or floor assembly. It is intended as a quick screening tool to compare different wall or floor assemblies. STC ratings are determined in a laboratory under controlled conditions. Even then, differences of 1-2 points STC can occur for the same assembly in the same laboratory. In the field, flanking noise, quality of material and construction practices can lead to widely varied STCs for the same assembly. Typically a two (2) or more point change in STC is necessary to notice an audible difference. Product Comparison Independent ASTM E90-1990 testing was used to determine Sound Transmission Class in accordance with ASTM E413 for several types of building insulation. All the testing was done at the same lab, using the same individually tested components, to give the most reproducible results. The results show that insulating the cavity is critical to acoustic performance. It also shows that the type of insulation does not significantly affect the performance of the assembly. Design Considerations Acoustical performance of metal stud interior partitions can be substantially affected by a number of important design and construction details. Important details include: 1. Seal the bottom plate and any wall penetrations with non-hardening permanently resilient sealant. 2. Location and attachment of outlets, ducts and mechanical equipment. Plumbing should be designed to allow for expansion and contraction. Pipes should also be isolated from structure using resilient mounts. 3. Use solid core wood or metal doors for best noise control. Depending on HVAC requirements, weather-stripping may be used around the door to reduce sound transmission. Acoustic Comparison of Cavity Insulation Types Gypsum Board Insulation Type Test Number STC One layer each side. 5 /8" None TL-92-618 38 5 /8" Glass fiber TL-93-325 49 5 /8" Mineral fiber TL-93-327 47 5 /8" Cellulose (spray) TL-93-049 45 One layer one side, two layers the other side 5 /8" Glass fiber TL-92-420 52 5 /8" Mineral fiber TL-93-329 53 5 /8" Cellulose (spray) TL-93-050 49 5 /8" Cellulose (blown) TL-92-437 49 3 5 /8" 25 Gauge Non Load Bearing Studs at 16" on center NRC-CNRC Internal Report IRC-IR-693, October 1995 Available Sizes Thickness Width Length 2" 16"/24" (406mm/609mm) 96" 3" 16"/24" (406mm/609mm) 96"

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