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HomeMy WebLinkAbout07 92 19 Acoustical Joint SealantsTHE KENT 07 92 19 - THE KENT Issue Date 05.09.18 ACOUSTICAL JOINT SEALANTS THE KENT SECTION 07 92 19 - ACOUSTICAL JOINT SEALANTS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section includes acoustical joint sealants. B. Related Requirements: 1. Section 07 92 00 "Joint Sealants" for elastomeric, latex, and butyl-rubber-based joint sealants for non-acoustical applications. 1.3 ACTION SUBMITTALS A. Product Data: For each acoustical joint sealant. B. Samples for Initial Selection: Manufacturer's color charts consisting of strips of cured sealants showing the full range of colors available for each product exposed to view. C. Samples for Verification: For each kind and color of acoustical joint sealant required, provide Samples with joint sealants in 1/2-inch- wide joints formed between two 6-inch- long strips of material matching the appearance of exposed surfaces adjacent to joint sealants. D. Acoustical-Joint-Sealant Schedule: Include the following information: 1. Joint-sealant application, joint location, and designation. 2. Joint-sealant manufacturer and product name. 3. Joint-sealant formulation. 4. Joint-sealant color. 1.4 INFORMATIONAL SUBMITTALS A. Product Test Reports: For each kind of acoustical joint sealant, for tests performed by manufacturer and witnessed by a qualified testing agency. B. Sample Warranties: For special warranties. 1.5 WARRANTY A. Special Installer's Warranty: Installer agrees to repair or replace acoustical joint sealants that do not comply with performance and other requirements specified in this Section within specified warranty period. THE KENT 07 92 19 - THE KENT Issue Date 05.09.18 ACOUSTICAL JOINT SEALANTS THE KENT 1. Warranty Period: Two years from date of Substantial Completion. B. Special Manufacturer's Warranty: Manufacturer agrees to furnish acoustical joint sealants to repair or replace those joint sealants that do not comply with performance and other requirements specified in this Section within specified warranty period. 1. Warranty Period: Two years from date of Substantial Completion. PART 2 - PRODUCTS 2.1 PERFORMANCE REQUIREMENTS A. Provide acoustical joint-sealant products that effectively reduce airborne sound transmission through perimeter joints and openings in building construction, as demonstrated by testing representative assemblies according to ASTM E 90. 1. Sealant shall have a VOC content of 250 g/L or less. 2.2 ACOUSTICAL JOINT SEALANTS A. Acoustical Sealant for Exposed Joints: Manufacturer's standard non-sag, paintable, non- staining latex acoustical sealant complying with ASTM C 834. 1. Products: Subject to compliance with requirements, provide one of the following: a. Acoustical Sealant for Exposed and Concealed Joints: 1) USG Corporation; SHEETROCK Acoustical Sealant. 2. Colors of Exposed Acoustical Joint Sealants: As selected by Architect from manufacturer's full range of colors. B. Acoustical Sealant for Concealed Joints: Manufacturer's standard non-sag, non-drying, non- hardening, non-skinning, non-staining, gunnable, synthetic-rubber acoustical sealant. 1. Products: Subject to compliance with requirements, provide one of the following: a. Acoustical Sealant for Concealed Joints: 1) Tremco, Inc.; Tremco Acoustical Sealant. 2.3 MISCELLANEOUS MATERIALS A. Primer: Material recommended by acoustical-joint-sealant manufacturer where required for adhesion of sealant to joint substrates. B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants and sealant backing materials, free of oily residues or other substances capable of staining or harming joint substrates and adjacent nonporous surfaces in any way and formulated to promote optimum adhesion of sealants to joint substrates. C. Masking Tape: Non-staining, non-absorbent material compatible with joint sealants and surfaces adjacent to joints. THE KENT 07 92 19 - THE KENT Issue Date 05.09.18 ACOUSTICAL JOINT SEALANTS THE KENT PART 3 - EXECUTION 3.1 EXAMINATION A. Examine joints indicated to receive acoustical joint sealants, with Installer present, for compliance with requirements for joint configuration, installation tolerances, and other conditions affecting performance of the Work. B. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 PREPARATION A. Surface Cleaning of Joints: Clean out joints immediately before installing acoustical joint sealants to comply with joint-sealant manufacturer's written instructions. B. Joint Priming: Prime joint substrates where recommended by acoustical-joint-sealant manufacturer. Apply primer to comply with joint-sealant manufacturer's written instructions. Confine primers to areas of joint-sealant bond; do not allow spillage or migration onto adjoining surfaces. C. Masking Tape: Use masking tape where required to prevent contact of sealant or primer with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by cleaning methods required to remove sealant smears. Remove tape immediately after tooling without disturbing joint seal. 3.3 INSTALLATION OF ACOUSTICAL JOINT SEALANTS A. Comply with acoustical joint-sealant manufacturer's written installation instructions unless more stringent requirements apply. B. STC-Rated Assemblies: Seal construction at perimeters, behind control joints, and at openings and penetrations with a continuous bead of acoustical joint sealant. Install acoustical joint sealants at both faces of partitions, at perimeters, and through penetrations. Comply with ASTM C 919, ASTM C 1193, and manufacturer's written recommendations for closing off sound-flanking paths around or through assemblies, including sealing partitions to underside of floor slabs above acoustical ceilings. C. Acoustical Ceiling Areas: Apply acoustical joint sealant at perimeter edge moldings of acoustical ceiling areas in a continuous ribbon concealed on back of vertical legs of moldings before they are installed. 3.4 CLEANING A. Clean off excess sealant or sealant smears adjacent to joints as the Work progresses by methods and with cleaning materials approved in writing by manufacturers of acoustical joint sealants and of products in which joints occur. THE KENT 07 92 19 - THE KENT Issue Date 05.09.18 ACOUSTICAL JOINT SEALANTS THE KENT 3.5 PROTECTION A. Protect acoustical joint sealants during and after curing period from contact with contaminating substances and from damage resulting from construction operations or other causes so sealants are without deterioration or damage at time of Substantial Completion. If, despite such protection, damage or deterioration occurs, cut out, remove, and repair damaged or deteriorated acoustical joint sealants immediately so installations with repaired areas are indistinguishable from original work. END OF SECTION 07 92 19