SECTION 09390
DUROCK INTERIOR TILE BACKER BOARD
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Use this guide specification to specify DUROCK Interior
Tile
Backer Board systems. Review a copy of USG Publication
SA-932
before editing specification
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PART 1 - GENERAL
GENERAL DOCUMENTS
Drawings and general provisions of Contract, including
General
and Supplementary Conditions and Division 1 Specification
Sections, apply to this Section.
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EDIT THIS ARTICLE TO DESCRIBE SCOPE OF THIS SECTION
AND TO
COORDINATE WITH OTHER SECTIONS.
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This Section includes tile backer boards. Extent
of tile backer
board is shown on drawings, and includes:
Underlayment for tiled floors and countertops.
Backer board for tiled walls and ceilings.
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TO ASSURE COMPATIBILITY OF TILE BACKER BOARD WITH
TILE SETTING
AND GROUTING MATERIALS, UNITED STATES GYPSUM COMPANY
RECOMMENDS
THAT THE TILE SETTING AND GROUTING MATERIALS LISTED
IN THIS GUIDE
SPECIFICATION BE USED WITH DUROCK TILE BACKER BOARDS.
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This Section also includes related materials including:
Setting and grouting materials for installation of
tile to tile
backer boards.
Acoustical sealant and sound insulation.
Wood framing, furring, and subfloor are specified
in Division 6
Section "Rough Carpentry."
Countertop base is specified in Division 6 Section
"Architectural
Woodwork".
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RETAIN BELOW IF REQUIRED WATER RESISTANCE EXCEEDS
CAPABILITY OF
WATER BARRIER SPECIFIED IN THIS SECTION.
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Waterproofing for stud cavity or floor framing is
specified in
Division 7 Section "Waterproofing."
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RETAIN BELOW IF FIRE RATED PARTITIONS ARE REQUIRED.
FOR
ADDITIONAL INFORMATION ON FIRE STOPS, SEE USG PRODUCT
LITERATURE
FOR THERMAFIBER FIRE SAFING INSULATION AND SMOKE-STOP
SYSTEMS.
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Fire stop insulation and sealants, required at penetrations
through fire resistive partitions, are specified
in Division 7
Section "Firestopping".
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EDIT BELOW TO SUIT PROJECT. GYPSUM BOARD BASE LAYER
AND
INSULATION ARE REQUIRED FOR SEVERAL OF THE DUROCK
CEMENT BOARD
FIRE AND SOUND RATED SYSTEMS. AT SPECIFIER'S OPTION,
THEY CAN BE
SPECIFIED IN EITHER THIS SECTION OR DIVISION 9 SECTION
"GYPSUM
DRYWALL". IF SPECIFIED IN GYPSUM DRYWALL, PROVIDE
CROSS
REFERENCE TO THIS SECTION AND COMPLY WITH REQUIREMENTS
FOR RATED
ASSEMBLIES. SEE USG PRODUCT LITERATURE FOR COMPATIBLE
PRODUCTS
FROM UNITED STATES GYPSUM COMPANY.
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Metal framing, gypsum drywall, and insulation are
specified in
Division 9 Section "Gypsum Drywall."
Gypsum board base layer for installation under tile
backer board
is specified in this section.
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IF STONE, THIN BRICK, OR OTHER FINISH MATERIAL IS
USED INSTEAD OF
TILE, EDIT BELOW AND CHANGE REFERENCES THROUGHOUT
SECTION.
SEE USG PRODUCT LITERATURE FOR DURABOND TILE SETTING
AND GROUTING
PRODUCTS WHICH ARE COMPATIBLE WITH MATERIALS SPECIFIED
IN THIS
SECTION.
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Tile is specified in Division 9 Section "Tile".
SYSTEM DESCRIPTION
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IF FIRE RATED OR SOUND RATED PARTITIONS ARE REQUIRED,
MODIFY
BELOW EXAMPLE ACCORDING TO PERFORMANCE LEVELS REQUIRED
BY
PROJECT.
COORDINATE RELATED WORK SPECIFIED IN OTHER SECTIONS
TO MAINTAIN
INTEGRITY OF RATED ASSEMBLIES. SEE CURRENT USG PRODUCT
LITERATURE FOR AVAILABLE RATINGS AND SYSTEMS.
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Performance: Construct partition in accordance with
requirements
of tested and approved designs to obtain the following:
Sound Rating: Sound Transmission Class (STC) not
less than 61
when tested in accordance with ASTM E 336 and classified
in
accordance with ASTM E 413; USG Test No. SA-851028.
Fire Rating: 2 hour minimum, ASTM E 119. Comply
with UL Design
U443 and Council of American Building Officials (CABO)
National
Evaluation Service Committee Report No. NER-259.
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OMIT BELOW DESCRIPTION IF PARTITION IS ADEQUATELY
DETAILED ON
DRAWINGS. MODIFY FOLLOWING EXAMPLE IN ACCORDANCE
WITH PROJECT
REQUIREMENTS.
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Description:
Studs: 3-5/8 inches nominal, 25 gage steel studs,
non-load
bearing.
Wall Boards: Tile backer board installed over gypsum
board base
layer, both sides of partition.
Where tile finish is not required on both sides of
a partition,
omit tile backer board from un-tiled side and provide
a double
layer of gypsum board as specified in Division 9
Section "Gypsum
Drywall".
Sound Insulation: 3 inches thick.
SUBMITTALS
Product Data: Submit manufacturer's data for each
type of
component and system specified, including performance
ratings,
details of construction, materials, and installation
instructions.
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DELETE BELOW IF RATINGS ARE NOT REQUIRED OR IF PRODUCT
DATA
SUBMITTAL IS SUFFICIENT.
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Test Reports: Submit test reports from qualified
testing
laboratories indicating compliance with fire and
sound resistance
requirements.
Samples: Submit standard size sample of tile backer
board.
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EDIT BELOW AS REQUIRED. DELETE IF COLORS ARE PRESELECTED
AND
SCHEDULED.
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Samples for Initial Selection Purposes: Submit samples
of grout
showing full range of colors available.
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RETAIN BELOW IF REQUIRED TO COORDINATE WITH TILE
SUBMITTAL
REQUIREMENTS.
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Samples for Verification Purposes: Submit samples
of grout
applied to tile sample boards specified in Division
9 Section
"Tile".
DELIVERY, STORAGE, AND HANDLING
Deliver materials in their original unopened packages,
containers, or bundles bearing brand name and identification
of
manufacturer or supplier.
Store materials under cover and in manner to keep
them dry,
protected from weather, direct sunlight, surface
contamination,
corrosion and damage from construction traffic and
other causes.
Protect tile setting and grouting materials from
freezing. Neatly
stack tile backer boards to prevent sagging; stack
flat, on
continuous surface, and without skids.
Handle tile backer boards to prevent damage to edges,
ends or
surfaces. Remove damaged or deteriorated materials
from site.
PROJECT CONDITIONS
Cold Weather Protection: In cold weather, maintain
continuous,
uniform, building temperatures of not less than 45
deg F (13 deg
C) or more than 100 deg. F (38 deg. C) for a minimum
period of 48
hours prior to, during, and following tile backer
board and tile
installation.
Conditioning: Store tile backer board in spaces
where it is to
be installed for 48 hours prior to installation.
Do not install
board when it is wet.
Ventilation: Ventilate building spaces as required
to remove
excess moisture.
PART 2 - PRODUCTS
MANUFACTURER
Subject to compliance with requirements, provide
products
manufactured or supplied by United States Gypsum
Company.
MATERIALS
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DUROCK EXTERIOR CEMENT BOARD CAN ALSO BE USED AS
A TILE BACKER
BOARD. DUROCK EXTERIOR CEMENT BOARD HAS GREATER
FLEXURAL
STRENGTH THAN DUROCK TILE BACKER BOARD.
SINCE IT IS AVAILABLE IN SHEETS 4 FEET WIDE BY 8
FEET LONG, IT
CAN BE USED ECONOMICALLY ON LARGE WALL AND FLOOR
AREAS WHERE IT
REDUCES THE NUMBER OF JOINTS TO BE TREATED.
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FOR ADDITIONAL INFORMATION, SEE USG PRODUCT FOLDER
SA-700. DO
NOT USE DUROCK INTERIOR TILE BACKER ON BUILDING EXTERIOR.
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Tile Backer Board: DUROCK Interior Tile Backer Board;
aggregated
portland cement board with vinyl-coated, woven glass-fiber
mesh
embedded in back and front surfaces.
Thickness: 1/2 inch minimum.
Size: 3 feet wide; 4, 5, or 6 feet long.
Faces: Smooth on one side, textured on other side.
Edges: Formed smooth edges; square cut ends.
Weight:3 pounds per square foot.
Flexural Strength: 750 psi minimum per ASTM C 947.
Compressive Strength: 2300 psi minimum with 1 inch
diameter disk
per ASTM D 2394.
Nail Pull Resistance: 125 lbs. minimum per ASTM
C 473.
Flame Spread, Smoke Developed: 5, 0 per ASTM E 84.
Floor Tile Installation System Rating: Residential
per ASTM C627
Underlayment: DUROCK Underlayment.
Thickness: 5/16".
Size: 4 feet x 4 feet
Edges: Formed smooth edges; square cut ends.
Floor Tile Installation System Rating: Residential
per ASTM C627
Joint Reinforcement: DUROCK glass-fiber tape, vinyl
coated,
open-weave tape; 2 inches wide; pressure-sensitive.
Gypsum Board Base Layer: 1/2 inch SHEETROCK Brand
FIRECODE "C"
gypsum panels.
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RETAIN ABOVE OR BELOW IF REQUIRED FOR SPECIFIED FIRE
RATED
ASSEMBLY; EDIT AS REQUIRED.
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Gypsum Board Base Layer: Specified in Division 9
Section "Gypsum
Drywall". Provide type required by specified
performance
requirements.
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NAILS AND STAPLES ARE FASTENER OPTIONS AT WOOD FRAMING
IN NON-
FIRE RATED ASSEMBLIES.
CONSULT CURRENT PRODUCT LITERATURE FOR MORE INFORMATION.
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Fasteners: Self-drilling screws with corrosion resistant
finish.
At Tile Backer Board: DUROCK screws with flat wafer
head capable
of being driven flush to surface of tile backer board;
1- 1/4
inch long.
When tile backer board is installed over gypsum board
base layer,
screws shall be 1-5/8 inches long.
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RETAIN ABOVE AND BELOW IF GYPSUM BOARD BASE LAYER
IS SPECIFIED IN
THIS SECTION.
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At Gypsum Board: USG bugle head drywall screws,
1 inch long.
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RETAIN BELOW IF RATED CONSTRUCTION IS REQUIRED.
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Acoustical Sealant: SHEETROCK Brand Acoustical Sealant.
Sealant
shall be type used in sound attenuation and fire
resistance tests
and shall remain resilient for life of installation.
Sound Insulation: THERMAFIBER Sound Attenuation
Fire Blankets
(SAFB); unfaced, semi-rigid spun mineral fiber mat,
2.5 pcf
minimum density, 2000 deg F meltpoint; 16 inches
x 48 inches x
thickness indicated; ASTM C 665, Type 1.
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RETAIN ABOVE OR BELOW IF RATED CONSTRUCTION IS REQUIRED.
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Sound Insulation: THERMAFIBER Sound Attenuation
Fire Blankets
(SAFB) as specified in Division 9 Section "Gypsum
Drywall".
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RETAIN BELOW IF REQUIRED. MODIFY IF VAPOR RETARDER
OR
WATERPROOFING IS REQUIRED.
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Water Barrier: Vapor permeable membrane, 15 lb.
asphalt felt or
TYVEK building paper by E.I. du Pont de Nemours &
Company.
Tile Setting Materials:
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SEE USG PRODUCT LITERATURE FOR TILE SETTING MATERIAL
SELECTION
INFORMATION. EDIT LISTING TO SUIT PROJECT.
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Organic Adhesives: ANSI A136.1, Type I. Provide
one of
following:
DUROCK Ceramic Tile Mastic.
DURABOND D-2001 Multi-Purpose Ceramic Tile Mastic.
DURABOND D-67 Multi Purpose Ceramic Tile Mastic.
Dry-set Mortar: ANSI A118.1. Provide one of following:
DURABOND D-50 Sanded Ceramic Tile Thin-Set Mortar
mixed with
DURABOND D-L16 Acrylic Latex Additive.
Latex-Portland Cement Mortar: ANSI A118.4. Provide
one of the
following:
DURABOND D-30 Marble and Granite Mortar.
DUROCK Latex Fortified Mortar.
DURABOND D-40 Latex Fortified Mortar.
Modified Epoxy Emulsion Mortar: ANSI A118.8; DURABOND
D-L19
CERAMIPOXY Tile Setting Mortar.
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SEE USG PRODUCT LITERATURE FOR GROUT SELECTION INFORMATION.
EDIT
LISTING BELOW TO SUIT PROJECT.
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Grout: Provide in colors selected by Architect/Engineer
from
manufacturer's standard colors.
Dry-Set Grout: ANSI A118.6; DURABOND C-150 Commercial
Dri-Set
Grout mixed with D-L26 Acrylic Latex Grout Additive
or DUROCK LFG
250 Latex Fortified Grout.
Acid Resistant Colored Floor Grout: ANSI A118.6;
DURABOND AR-20
Acid Resistant Colored Floor Grout mixed with D-L26
Acrylic Latex
Grout Additive.
Finishes for Un-Tiled Surfaces:
Tile Backer Board Sealer: DUROCK or DURABOND, Type
I Adhesive,
thin four parts adhesive with one part water.
Joint Tape: SHEETROCK Brand reinforcing tape.
Joint Compound: SHEETROCK Setting type or Lightweight
Setting
Type Joint Compound.
Finishing Compound: SHEETROCK Ready-Mixed Joint Compound
or
SHEETROCK Lightweight All Purpose Joint Compound
Ready-Mixed.
Corner Bead: USG DUR-A-BEAD No. 103 or No. 800,
galvanized steel
corner reinforcement, 1-1/4 inches x 1-1/4 inches.
PART 3 - EXECUTION
EXAMINATION
Examine substrates and framing for compliance with
requirements
and conditions affecting work of this Section. Do
not proceed
with installation until piping, waterproofing, and
other in-wall
work has been installed and accepted by Architect/Engineer
and
unsatisfactory conditions have been corrected.
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RETAIN BELOW FOR SOUND RATED PARTITIONS.
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Examine adjacent construction for conditions which
could
contribute to loss of sound attenuation.
GENERAL
Comply with manufacturer's printed installation instructions
applicable to products and applications indicated,
except when
more stringent requirements apply.
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RETAIN BELOW IF RATED CONSTRUCTION IS REQUIRED.
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Conform to construction requirements of tested assemblies
used to
demonstrate required sound attenuation and fire resistance.
Before installation, cut tile backer boards to required
sizes,
make necessary cut-outs for penetrations, and grind
or drill to
provide relief at bolts and screw heads which project
beyond face
of substrate.
Control Joints: Do not install tile backer board
continuously
through building movement and control joints or where
control
joints are required in ceramic tile.
Sound Insulation: Fiction fit insulation blankets
between
framing. Butt blanket ends and fill all voids.
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RETAIN ABOVE OR BELOW IF REQUIRED FOR RATED CONSTRUCTION.
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Sound Insulation: Install as specified in Division
9 Section
"Gypsum Drywall".
Acoustical Sealant: Completely seal around perimeter
of and
penetrations through sound rated partitions.
FLOORS AND COUNTERTOPS
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COORDINATE DIVISION 6 SPECIFICATIONS FOR SUBFLOOR
AND COUNTERTOP
BASE WITH REQUIREMENTS IN DUROCK PRODUCT LITERATURE.
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Floors and Countertops: Laminate DUROCK Underlayment
to 5/8"
minimum exterior grade plywood base using ceramic
tile mastic,
latex fortified mortar or thin-set mortar mixed with
acrylic
latex additive applied to subloor with 1/4"
square-notched trowel
for thin-set, 5/32" V-notched trowel for mastic.
Place
underlayment with joints staggered from subfloor
joints. Fit
ends and edges closely but not forced together.
Fasten to
subfloor with 1-1/4" DUROCK Wood Screws or 1-1/2"
galvanized
roofing nails spaced 8" o.c. in both directions
with perimeter
fasteners at least 3/8" and less than 5/8"
from ends and edges;
or with 1/4"x7/8" galvanized staples spaced
4" o.c. in both
directions. Prefill joints with tile-setting mortar
or adhesive
and then immediately embed tape and level joints;
or apply DUROCK
Interior Tape over the joints and then apply tile-setting
mortar
or adhesive, forcing it through the tape to completely
fill and
level the joints.
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EDIT ABOVE TO MATCH PRODUCT TYPES SELECTED.
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PARTITIONS AND CEILINGS
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EDIT BELOW AS REQUIRED.
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Framing: Install over framing type indicated on
drawings.
Install blocking to support tub and other plumbing
fixtures, and
to receive soap dishes, grab bars, towel racks and
other
accessories and hardware.
At shower receptors, fur out studs, if necessary,
so inside face
of receptor is flush with exposed face of tile backer
board.
Gypsum Board Base Layer: Install base layer; screw
to framing 24
inches o.c.
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RETAIN ABOVE OR BELOW IF REQUIRED FOR RATED CONSTRUCTION.
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Gypsum Board Base Layer: Install base layer as specified
in
Division 9 Section "Gypsum Drywall".
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EDIT OR DELETE BELOW AS REQUIRED.
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Water Barrier: Install over gypsum board base layer
at tubs,
showers, and other wet areas and where indicated.
Lap joints to
shed water towards face of partition. Bottom edge
shall overhang
lip of tub, shower pan, or shower receptor.
Apply tile backer boards to framing with long dimension
parallel
to or across framing. Fit ends and edges closely
but not forced
together. Center end or edge joints on framing and
stagger
joints in adjacent rows.
At tub, shower pan, or shower receptor, place temporary
1/4 inch
spacer strips around lip of fixture. Install board
abutting top
of spacer. Remove spacer before installing tile.
Joint sealants
are specified in another section.
Fasten tile backer board to framing. Locate screws
at least 3/8
inch from edge of board and as follows:
Walls - Wood Framing: 8 inches o.c.
Walls - Steel Framing 20 to 14-Gage: 8 inches o.c.
Ceiling: 6 inches o.c.
JOINT TREATMENT
Tiled Surfaces: Apply joint reinforcing over joints
and corners.
Embed with mortar or adhesive used to set tile.
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LIMIT UN-TILED SURFACES TO SMALL AREAS, SUCH AS FROM
TOP OF TILED
TUB SURROUND TO CEILING.
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Un-Tiled Exposed or Painted Surfaces: Install tile
backer board
with smooth side exposed. Seal tile backer board
with tile
backer board sealer. Apply tape over joints. Embed
joint tape
and treat fasteners with joint compound. Flat trowel
a skim coat
of joint compound over tile backer board to fill
voids. Sand to
provide a smooth surface except where a textured
finish is
indicated. Finish joints with at least two coats
of finishing
compound. Install corner beads at outside corners.
TILE INSTALLATION
Install tile in accordance with instruction of manufacturer
of
tile backer board and tile setting and grouting materials.
Comply
with the following standards:
Organic Adhesives: ANSI A136.1.
Dry-Set Adhesives: ANSI A108.5.
Latex Portland Cement Mortar: ANSI A108.5.
Grout: ANSI A108.10.
Provide tile patterns, trim, accessories, expansion
and control
joints, sealants, and other accessories as specified
in Division
9 Section "Tile".
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IF TILE INSTALLATION IS SPECIFIED IN THIS SECTION,
RETAIN
PARAGRAPHS ABOVE AND MODIFY AS REQUIRED. IF TILE
INSTALLATION IS
SPECIFIED IN ANOTHER SECTION, RETAIN BELOW.
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Install tile as specified in another Section. Install
with
setting materials and grouts acceptable to tile backer
board
manufacturer to assure compatibility with substrate.
END OF SECTION 09390
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Copyright 1991 by U.S. Gypsum Co.
A limited license is extended to qualified design
professionals
to duplicate and print this guide specification for
the purpose
of incorporating products manufactured by U.S. Gypsum
Co. into a
construction specification or purchase order.
Notice: We shall not be liable for incidental and
consequential
damages, directly or indirectly sustained, nor for
any loss
caused by application of these goods not in accordance
with
current printed instructions or for other than the
intended use.
Our liability is expressly limited to replacement
of defective
goods. Any claim shall be deemed waived unless made
in writing
to us within thirty (30) days from date it was or
reasonably
should have been discovered.
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