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Historic Preservation - Technical Procedures

Spectitle:

Installing Adhesively Applied Acoustical Ceiling Tiles

Procedure code:

0951201R

Source:

Federal Building/Uspo, Spokane, Wa - Gsa/Pbs

Division:

Finishes

Section:

Adhesive Applied Acoustical Ceilings

Last Modified:

02/24/2012

Details:

Installing Adhesively Applied Acoustical Ceiling Tiles



INSTALLING ADHESIVELY APPLIED ACOUSTICAL CEILING TILES


THOUGH THE INSTALLATION OF ADHESIVELY APPLIED ACOUSTICAL CEILING
TILES IN HISTORIC BUILDINGS IS NOT IN GENERAL CONFORMANCE WITH THE
SECRETARY OF THE INTERIOR'S GUIDELINES, IT WAS A COMMON PRACTICE IN
MANY BUILDINGS, PRE-DATING THE SUSPENDED CEILING SYSTEMS COMMONLY
USED TODAY.  BOTH OF THESE SYSTEMS WERE POPULAR FOR THEIR SOUND-
ABSORBING CHARACTERISTICS.  THIS TYPE OF WORK SHOULD ONLY BE
PERFORMED IN A MANNER WHICH CAUSES MINIMAL DAMAGE TO THE EXISTING
HISTORIC FABRIC.


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on installing acoustical
         tile ceilings, adhered to a substrate such as concrete or
         plaster.  Such tiles were often retrofitted into existing
         spaces before the advent of the "suspended grid"
         acoustical tile ceilings, but are generally out of favor
         at the present time.  

    B.   This product, though generally not recommended  has some
         advantages over the "suspended grid", especially in
         spaces where detailing in the upper portion of the room
         contributes to the character of the space and would
         otherwise be obscured by a drop ceiling.  Some advantages
         include 1) minimal reduction in the ceiling height, and
         2) retention of detailing such as ceiling cornices,
         picture molding, door transoms and other distinctive
         ornament.  These character-defining aspects of a space
         are often adversely impacted by the installation of
         suspended ceiling systems.

    C.   See 01100-07-S for general project guidelines to be
         reviewed along with this procedure.  These guidelines
         cover the following sections:

         1.   Safety Precautions

         2.   Historic Structures Precautions

         3.   Submittals

         4.   Quality Assurance

         5.   Delivery, Storage and Handling

         6.   Project/Site Conditions

         7.   Sequencing and Scheduling

         8.   General Protection (Surface and Surrounding)

         These guidelines should be reviewed prior to performing
         this procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).

1.02 REFERENCES

    A.   American Society for Testing and Materials (ASTM), 100
         Barr Drive, West Conshohocken, PA 19428, (610) 832-9585
         or FAX (610) 832-9555.

1.03 SYSTEM DESCRIPTION

    A.   Performance Requirements:

         1.   Fire Performance Characteristics:  Provide
              acoustical ceilings that are identical to those
              tested for the following fire performance
              characteristics, per ASTM test method indicated
              below, by UL or other testing and inspecting
              organizations acceptable to authorities having
              jurisdiction.  Identify acoustical ceiling
              components with appropriate markings of applicable
              testing and inspecting organization.

              a.   Surface Burning Characteristics:  As follows,
                   tested per ASTM E84 and complying with ASTM
                   E1264 for Class A products.

                   1)   Flame Spread:  25 or less.

                   2)   Smoke Developed:  50 or less.

1.04 SUBMITTALS

    A.   Product Data: Submit product data for each type of
         product specified.

    B.   Samples:  Samples of each type of exposed finish
         required, prepared on samples of each size indicated
         below and of same thickness and material indicated for
         final unit of work.  Where finishes involve normal color
         and texture variations, include sample sets showing full
         range of variations expected.

         1.   Full-size samples of each tile type, pattern, and
              color required.

         2.   Set of 12-inch-long samples of exposed moldings for
              each color and system type required.

1.05 QUALITY ASSURANCE

    A.   Qualifications:

         1.   Installer Qualifications:  Engage and experienced
              installer who has successfully completed acoustical
              ceilings similar in material, design, and extend to
              that indicated for project.

         2.   Single-Source Responsibility for Ceiling Units:
              Obtain each type of acoustical ceiling unit from a
              single source with resources to provide products of
              consistent quality in appearance and physical
              properties without delaying progress of the work.

1.06 DELIVERY, STORAGE AND HANDLING

    A.   Packing and Shipping:  Deliver acoustical ceiling units
         to project site in original, unopened packages and store
         them in a fully enclosed space where they will be
         protected against damage from moisture, direct sunlight,
         surface contamination, and other causes.

    B.   Acceptance at Site:  Handle acoustical ceiling units
         carefully to avoid chipping edges or damaging units in
         any way.  Materials which have been damaged shall be
         replaced with new at no additional cost.

    C.   Storage and Protection:  Extra Materials:  Deliver extra
         materials to contracting officer.  Furnish extra
         materials described below that match products installed,
         are packaged with protective covering for storage, and
         are identified with appropriate labels.

         1.   Acoustical Ceiling Units:  Furnish quantity of
              full-size units equal to 2.0 percent of amount
              installed.

1.07 PROJECT/SITE CONDITIONS

    A.   Environmental Requirements:

         1.   Space Enclosure:  Do not install interior
              acoustical ceilings until space is enclosed and
              weatherproof, wet work in space is completed and
              nominally dry, work above ceilings is complete, and
              ambient conditions of temperature and humidity will
              be continuously maintained at values near those
              indicated for final occupancy.

         2.   Before installing acoustical ceiling units, permit
              them to reach room temperature and a stabilized
              moisture content.

1.08 SEQUENCING AND SCHEDULING

    A.   Coordination of Work:  Coordinate layout and installation
         of acoustical ceiling units and suspension system
         components with other construction that penetrates
         ceilings or is supported by them, including light
         fixtures, HVAC equipment, fire-suppression system
         components, and partition system.


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Armstrong World Industries, Inc.
         800/448-1405

    B.   Celotex Corporation
         Roofing Products Division
         P.O. Box 31602
         Tampa, FL  33631

    C.   USG Interiors, Inc.
         101 South Wacker Drive
         Chicago, IL 60606
         312/606-4000

2.02 MATERIALS

    A.   Acoustical Ceiling Tiles - Mineral-Base, Water Felted
         such as "Travertone Fissured" (Armstrong World
         Industries, Inc.), "Celotone Natural Fissured" (Celotex
         Corp.), "Acoustone F Fissured" (USG Interiors, Inc.), or
         approved equal.

         1.   Provide manufacturers' standard units of
              configuration indicated that comply with ASTM E1264
              classifications as designated by reference to
              types, patterns, acoustical ratings, and light
              reflectances, unless otherwise indicated.

         2.   Provide products to match appearance
              characteristics:  For acoustical ceiling units
              whose appearance characteristics are indicated by
              reference to ASTM E1264 designations for pattern
              and not by limiting to the naming of one or more
              products or manufacturers, provide Architect's
              selections from each named manufacturer's full
              range of standard products of type, color, pattern,
              and light reflectance indicated.

    B.   Tile Adhesive:  ASTM D1779, type as recommended by tile
         manufacturer, bearing UL label for Class O - 25 flame
         spread.

    C.   Concealed Acoustical Sealant:  Nondrying, nonhardening,
         nonskinning, nonstaining, nonbleeding, gunnable sealant.


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Examine substrates and structural framing to which
         ceiling system attaches or abuts, with installer present,
         for compliance with requirements specified in this and
         other sections that affect installation and anchorage of
         ceiling system.  Do not proceed with installation until
         unsatisfactory conditions have been corrected.

3.02 PREPARATION

    A.   Testing Substrates:  Before installing adhesively applied
         tile on wet-placed substrates such as cast-in-place
         concrete or plaster, test and verify that moisture level
         is below tile manufacturer's recommended limits.

    B.   Measure each ceiling area and establish layout of
         acoustical units to balance border widths at opposite
         edges of each ceiling.  Avoid use of less-than-half-width
         units at borders, and comply with reflected ceiling
         plans.

3.03 ERECTION, INSTALLATION, APPLICATION

    A.   Arrange acoustical units and orient directionally
         patterned units (if any) in manner shown by reflected
         ceiling plans.

         1.   Install tile with pattern running in one direction.

         2.   Install tile with pattern running in alternating
              directions to form checkerboard layout.

    B.   Install edge moldings of type indicated at perimeter of
         acoustical ceiling area and at locations where necessary
         to conceal edges of acoustical units.

         1.   Sealant Bed:  Apply continuous ribbon of acoustical
              sealant, concealed on back of vertical leg before
              installing moldings.

         2.   Screw-attach moldings to substrate at intervals not
              over 16 inches o.c. and not more than 3 inches from
              ends, leveling with ceiling suspension system to
              tolerance of 1/8 inch in 12'-0".  Miter corners
              accurately and connect securely.

    C.   Install acoustical tile by cementing to substrate, using
         amount of adhesive and procedure recommended by tile
         manufacturer including removal of loose dust from backs
         of tiles by brushing and then priming them with thin coat
         of adhesive.  Install splines in joints between tiles and
         level to 1/8 inch in 12'-0" tolerance.  Maintain tight
         butt joints, aligned both directions, and coordinated
         with ceiling fixtures.  Scribe and cut tile to fit
         accurately at ceiling edges and penetrations.

3.04 ADJUSTING/CLEANING

    A.   Clean exposed surfaces of acoustical ceilings, including
         trim, edge moldings, and suspension members.  Comply with
         manufacturer's instructions for cleaning and touch-up of
         minor finish damage.  Remove and replace work that cannot
         be successfully cleaned and repaired to permanently
         eliminate evidence of damage.

                        END OF SECTION