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Historic Preservation - Technical Procedures
Stripping Built-Up Floor Coatings From Marble
National Capitol Region Specifications
Stripping Built-Up Floor Coatings From Marble
STRIPPING BUILT-UP COATINGS FROM MAR= BLE
A. This procedure includes guidance on stripping built-up
coatings from marble surfaces. The= se may include floor
coatings splashed onto adjacent marble surfaces.
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 Precaution= s
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 SYSTEM DESCRIPTION
A. Performance Requirements: The objectives for marble
cleaning are to remove dirt, grime and coatings from the
surfaces without damaging the underlying material and to
give all the marble a clean uniform appearance without
1. Sample panels for cleaning and patching shall be
prepared for approval and shall establish a
standard for all marble work. The locations and
types of control samples are to be indicated on a
plan, with a photograph of each control sample to
be submitted to the Contr= acting Officer's
representative. No work shall commence until
written approval for the control samples has been
obtained from the Contrac= ting Officer's
2. The Contractor shall clean sample panels 2'-0" by
2'-0" in area, on each color and type of marble,
for approval by the Contr= acting Officer's
representative. Locations of sample panels to be
selected by the Contracti= ng Officer's
1.04 QUALITY ASSURANCE
A. Regulatory Requirements:
1. Comply with municipal and Federal regulations
governing all work includ= ed in this section and
including, but not limited to, cleaning, waste
disposal and protection to adjacent properties.
2. Contractor: The work shall be performed by a firm
possessing a minimum of five (5) years of
specialized experience in the restoration and
cleaning of historic architectural marble, similar
to that which is required in this project. The
Contractor shall submit to the Contracting
Officer's representative references of previous
work, justifying the firm's experience. The
Contracting Officer's representative reserves the
right to approve or disap= prove the use of the
Contractor contingent upon their experience.
a. NOTE: The quali= ty of the work is highly
depen= dent on the competence of the Contractor
becau= se it is not possible to anticipate every
varia= tion encountered int he surfaces, job
condi= tions and methods used.
A. ProSoCo, Inc.
755 Minnesota Avenue
P.O. Box 1578
Kansas City, KS 66117
800/255-4255 or 913/281-2700
B. Eastern Marble Supply Company
A. Water: Potable, non-staining and free of oils, acids,
alkalis and organic matter.
B. Polishing Compound - An acid-free abrasive compoun= d
containing no caustic or harsh fillers or ingredients
with natural resins added, manufactured specifically for
polishing interior marble surfaces, such as "RS2B"
(Eastern Marble Supply Company), or approved equal.
C. Cleaning Agents -(General Cleaning): A poultice
incorporating surfactants and biodegrada= ble detergents in
dry form for the removal of general staining.
Commercially available. The poultice is mixed with water
and an additive containing special deter= gents and wetting
agents, such as "Sure Klean Marble Poultice", "Sure Klean
Marble Poultice Additive" (ProSoCo, Inc.), or approved
D. Cleaning Agents -(Built-Up Coatings): a non-acidic gel-
like application for removal of built-up stains using
thixotropic alkali materials with a pH value between 7
and 10, such as "Sure Klean Liquid Marble Cleaner", "Sure
Klean T-942 Limestone Cleaner" (ProSoCo Inc.), or approved
A. Stainless steel trowel
B. Wood scrapers
C. Stiff bristle brushes (non-ferrous bristle)
1. Take all necessary precautions and measures to
protect all surrounding materials from damage that
might be incurred during the marble restoration
work. Any damage caused by the Contractor to other
materials is unacceptable and shall be repaired or
replaced by the Contractor to the satisfaction of
the Contracting Officer's representative, at not
cost to the Government.
2. Improper use of chemicals may constitute a health
hazard. Refer to manufact= urer's Material Safety
Data Sheets for hazard data, special protection,
for use and precautions to be taken in handling and
storage. Comply with manufacturer's recommendations
for proper use of chemica= ls.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Cleaning Existing Built-Up Coating from Marble:
1. Strip built-up splashed floor coatings from the
lower part of marble veneer walls by applying
thixotropic alkali materi= als to the stone ("Sure
Klean Liquid Marble Clean= er", and low pressure cold
water rinsing (less than 100 psi). Brush apply the
materials undilulted and let dwell for 20 to 60
minutes depending on field test trials. Do not
allow cleaners to dry. The Contractor should clean
one whole panel at a time, so as to maintain a
uniform result on each panel and prevent cleaning
2. Before rinsing, scrub for 5 to 10 minutes with
bristle brushes to loosen tenacious coatings. Do
not use metal brushes. Repeat application for
stubborn build up. Do not allow cleaners to come in
contact with the adjacent materials.
B. General Cleaning of Marble: Remove soiling and stains
from marble veneer using a poultice incorporating
surfactants and detergents.
1. Prepare the poultice by mixing the additive with
the dry poultice (fuller's earth) to the
consistency of thick cream and apply a =AC" thick
layer to the pre-wet masonry using a stainless
steel trowel or a non-fer= rous implement.
2. Cover the poultice with a membrane and allow to dry
for 8 to 24 hours dependi= ng on field test trials.
3. Scrape poultice from the mason= ry with a non-
metallic implement and scrub with water and a fiber
4. Rinse with low pressure water to remove all traces
of the poulticing materia= ls. The removal of crusted
splashed coatings should precede general poultice
cleaning in order to achieve a uniform result.
END OF SECTION