1.1 Installation of all acoustical work covered in this section of the specifications shall be by a qualified acoustical contractor.
1.2 Acoustical Contractor shall furnish all labor, materials and equipment necessary to complete the acoustical work in accordance with this section of the specifications and applicable drawings.
1.3 Substitutions will not be permitted for materials and methods covered in this section.
1.4 Installation of Materials shall not begin until all of the requirements of Section 4 ”Job Site Conditions” of this specification have been met.
1.5 Acoustical Contractor shall be responsible for the examination and acceptance of all surfaces and conditions affecting the proper installation of these materials, and shall not proceed until all conditions have been corrected.
1.6 All Product Materials and Product Workmanship shall be guaranteed free of defects by the manufacturer for a period of one year from the date of delivery.
2. Acoustical Materials and Properties
2.1 Silentspace¨ Ceiling Panels
2.2 Acoustical ceiling shall be ESSI Silentspace® (select model).
2.3 Panels shall be ______ wide x ______ long x ______ thick. With rigid fiberglass core.
2.4 Decorative finish (select finish, color, graphics, etc.) shall be bonded to fiberglass core on one side. Manufacturer guarantees smooth, wrinkle-free finish.
2.5 Panels shall have a class ”A” fire rating per ASTM E84.
3. Fire Protection
3.1 Acoustical Material shall have a Class A Flame Spread Classification according to Federal Specification. ASTM E84-89a; a test method similar to methods NFPA No. 225, UL No. 723 and UBC No. 42-1. The material shall also be classified by Underwriters Laboratories, Inc. for a flame spread index of 0-25; smoke developed 0-450.
4. Job Site Conditions
4.1 Installation of ESSI acoustical products shall not begin until all wet work such as concrete, plastering and terrazzo is completely and thoroughly dried out.
4.2 Installation of ESSI acoustical products shall not begin until the building has been closed to the weather and suitable mechanical ventilation is supplied to maintain condition ranges of 60ûF to 85ûF at not more than 70% RH. These conditions shall be maintained prior to, during and after installation.
4.3 Delivery and Storage of Materials. All materials shall be delivered in their original unopened packages and stored in an enclosed shelter providing protection from damage and exposure to the elements. Damaged or deteriorated materials shall be removed from the premises. Immediately before installation, panels shall be stored for a sufficient time to stabilize temperature and humidity conditions ambient during installation and anticipated for occupancy.