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Removing And Replacing Damaged Marble Veneer
REMOVING AND REPLACING DAMAGED MARBLE VENEER
THIS PROCEDURE SHOULD BE PERFORMED UNDER THE DIRECTION OF AN
HISTORICAL ARCHITECT OR ENGINEER TO DETERMINE THE MOST EFFICIENT
AND LEAST DESTRUCTIVE MANNER FOR EXECUTING THE WORK. APPROVAL
FROM
THE REGIONAL HISTORIC PRESERVATION OFFICER IS REQUIRED.
PART 1---GENERAL
1.01 SUMMARY
A. This procedure includes guidance on removing damaged
pieces of marble veneer and replacing with new to match
existing.
B. 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. Applicable Publications: The following publications of
the issues listed below, but referred to thereafter by
basic designation only, form a part of this specification
to the extent indicated by the references thereto:
1. American Society for Testing and Materials (ASTM),
www.astm.org
a. C119-71 - Definition of terms relating to
natural building stone.
b. C-241-51 - Test for abrasion resistance of
stone subjected to foot traffic.
2. American National Standard Institute (ANSI)
www.ansi.org
a. A-94.1 - Standard specification for interior
marble.
3. Marble Institute of America (MIA)
www.marble-institute.com
a. "Dimension Stone, Design Manual IV"
1.03 SUBMITTALS
A. Shop Drawings: Submit cutting and setting drawings
showing sizes, dimensions, sections and profiles of
marble units, arrangement and provisions of jointing,
anchoring and fastening, supports and other necessary
details for lifting devices and reception of other work.
Indicate location of each unit of marble on setting
drawings with number designation corresponding to number
marked on each unit.
1. Show location of inserts (for marble anchors and
supports) which are to be built into concrete or
masonry substrate.
B. Samples: Submit 3 sets of samples, not less than 12" x
12" x 1/4" of each different color, grade and finish of
marble required. Include in each set the full range of
exposed color and texture to be expected in completed
work.
1.04 DELIVERY, STORAGE AND HANDLING
A. Acceptance at Site: Handle marble to prevent chipping,
breakage, soiling or other damage. Do not use pinch or
wrecking bars without protecting edges of marble with
wood or other rigid materials. Lift with wide-belt type
slings wherever possible; do not use wire rope or ropes
containing tar or other substance which might cause
staining. If required, use wood rollers and provide
cushion at end of wood slide.
B. Storage and Protection:
1. Protect marble, mortar materials and accessories
during storage and construction against moisture,
soiling, staining and physical damage.
2. Store marble on wood skids or pallets, covered with
non-staining, waterproof membrane. Place and stock
skids and stones to distribute weight evenly and to
prevent breakage or cracking of marble. Protect
stored marble from weather with waterproof,
nonstaining covers or enclosures, but allow air to
circulate around marble.
3. Handle marble to prevent chipping, breakage,
soiling or other damage. Do not use pinch or
wrecking bars without protecting edges of marble
with wood or other rigid materials. Lift with
wide-belt type slings wherever possible; do not use
wire rope or ropes containing tar or other
substances which might cause staining. If
required, use wood rollers and provide cushion at
end of wood slide.
PART 2---PRODUCTS
2.01 MATERIALS
A. Marble Materials: Of color, finish, size, and type to
match existing.
B. Setting Materials:
1. Portland Cement: ANSI/ASTM C 150, Type I, except
complying with staining requirements of ASTM C 91
for not more than 0.03% water soluble alkali.
2. Hydrated Lime: ANSI/ASTM C 207, Type I.
3. Sand: ANSI/ASTM C 144, non-staining, except graded
with 100% passing the No. 166 sieve for 1/4" and
narrower joints.
a. For white pointing mortar and grout, furnish
natural white sand or ground white stone
complying with specified requirements.
b. For colored pointing mortar and grout, furnish
ground marble, granite or other sound stone,
meeting specified grading requirements for
sand, of color required to match existing
mortar and grout color.
4. Water: Potable, clear and not of Clean and
potable, free of oils, acids, alkalis, salts,
organic matter or other deleterious materials which
would impair the work.
5. Dry-Set Mortar: Factory-sanded Portland cement and
additives complying with ANSI A 118.1, of type
approved by mortar manufacturer and marble supplier
for application indicated.
6. Molding Plaster: ANSI/ASTM C 59.
C. Marble Accessories:
1. Anchors, Dowels or Cramps: Fabricate from
corrosion resistant metals. Special cramps,
dowels, and the like shall be used where shown on
shop drawings but elsewhere #12 stubs gage half
hard yellow brass wire anchors shall be used. It
shall be the responsibility of the Contractor to
anchor all marble pieces securely. In general, for
standing marble, the following practices usually
prevail:
a. A minimum of 2 anchors shall be required on
all pieces up to 2 square feet in area.
b. A minimum of 4 anchors shall be required on
all pieces 2 square feet to 20 square feet in
area.
c. A minimum of 2 additional anchors shall be
required for each additional 10 square feet on
pieces above 20 square feet.
2. Setting Buttons: Lead or plastic buttons of
thickness required for joint size indicated and of
size required to maintain uniform joint width.
PART 3---EXECUTION
3.01 PREPARATION
A. Protection: Protect surrounding surfaces of building
from damage resulting from marble restoration work.
B. Protect marble surfaces during construction period with
Kraft paper or other heavy covering of type that will not
stain or discolor marble.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Stone fabrication shall be in accordance with the
applicable publications listed in Part 1. Fabrication
shall include surface tolerances, dimensions and
finishes.
B. Marble shall have setting number on the back or on an
unexposed edge that corresponds with the number on the
approved shop drawings.
C. Backs of pieces shall be sawn or roughly dressed so that
maximum variation in thickness from that required shall
not exceed 1/4".
D. Cutting for work of other trades shall be done neatly and
accurately to the required size.
E. Marble installation shall be in accordance with the
publications listed in Part 1 applicable to the specified
stone. For details and stone types not otherwise
covered, erection shall be in accordance with the listed
publications for marble. Erection shall include the
mechanical anchorage system, jointing, setting, anchors
and dowels, pointing protection and cleaning.
F. Remove all deteriorated or damaged wall pieces as
directed by RHPO. Remove all non-original material
including non-matching patches. Remove existing setting
buttons and prepare substrate material as required to
insure proper installation of new pieces.
G. Erect new facing stones and trim plumb and true with
joints uniform in width and accurately aligned. Provide
setting buttons as required to maintain joint width.
1. Set marble units firmly against plaster spots
located at or near the anchors and spaced not
further than 18" apart over the back of the piece,
unless otherwise indicated.
H. Point joints after setting with pointing mortar to match
color of existing mortar or to match color of marble.
Color of marble shall be established in mock-ups. Mix in
proportions of 1 part Portland cement, 1 part lime, and
3 parts sand; unless otherwise indicated. Rub joints
smooth with plastic tool.
3.03 ADJUSTING/CLEANING
A. Epoxy patch existing marble units which become chipped or
cracked during execution of this procedure. For guidance
on repair of marble using epoxies see 04455-03-R.
B. Before final inspection, remove protective covering and
reclean any soiled surfaces. For guidance on specific
cleaning procedures see 04455-02-R and 04455-06-R.
END OF SECTION
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