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Historic Preservation - Technical Procedures

Spectitle:

Removal Of Adhesive Residue From Brick, Granite & Limestone

Procedure code:

0420001R

Source:

National Capitol Region Specifications - Cohen Building

Division:

Masonry

Section:

Unit Masonry

Last Modified:

02/24/2012

Details:

Removal Of Adhesive Residue From Brick, Granite & Limestone



REMOVAL OF ADHESIVE RESIDUE FROM BRICK, GRANITE AND LIMESTONE


THE CLEANING OR REMOVAL OF STAINS FROM STONE MAY INVOLVE THE USE OF
LIQUIDS, DETERGENTS OR SOLVENTS WHICH MAY RUN OFF ON ADJACENT
MATERIAL, DISCOLOR THE STONE OR DRIVE THE STAINS DEEPER INTO POROUS
STONES.  USE THE PRODUCTS AND TECHNIQUES DESCRIBED HERE ONLY FOR
THE COMBINATIONS OF DIRT/STAIN AND STONE SPECIFIED.


PART 1--- GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on removing adhesive
         residue remaining on brick, granite and limestone
         surfaces after removing signage or other objects which
         have been applied directly to the marble surface.  

    B.   Surface-mounted signage is a common problem in GSA
         buildings, both on the exterior and in public lobbies.
         The signage is often applied directly to the stone
         surface with an adhesive.  This solution for needed
         signage is unsightly, and reversal is often difficult,
         leaving the surface discolored and stained.  Free-
         standing signage is usually the preferred solution, when
         possible.

    C.   For guidance on other types of stain removal from
         granite, see 04465-01-R, 04465-02-R, 04465-03-R, 04465-
         04-R, 04465-05-R, 04465-06-R, 04465-08-R, 04465-14-R,
         04465-16-R, 04465-19-R, 04465-20-R, 04465-25-R, and
         04465-26-R.

    D.   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).  

    D.   For additional information on poulticing, see 04455-02-R.


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Diedrich Chemicals Restoration Technologies, Inc.
         300A East Oak Street
         Oak Creek, WI  53154
         414/764-0058 or 800/323-3565

    B.   ProSoCo, Inc.
         755 Minnesota Avenue
         P.O. Box 1578
         Kansas City, KS  66117
         800/255-4255 or 913/281-2700

2.02 MATERIALS

    A.   Adhesive Residue Remover: Commercially available
         emulsified, non-corrosive, non-caustic liquid solvent
         cleaner specifically formulated for removal of asphalt,
         grease, oil and similar stains from brick, stone and
         other masonry surfaces, such as "Sure Klean Asphalt and
         Tar Remover" (ProSoCo, Inc.), or approved equal.

    B.   Liquid Strippable Masking Agent: Manufacturer's standard
         liquid, film forming, strippable masking material for
         protecting glass, metal and polished stone surfaces from
         damaging effect of acidic and alkaline masonry cleaners,
         such as "Sure Klean Acid Stop" (ProSoCo, Inc.), "Diedrich
         Acid Guard" (Diedrich Chemicals), or approved equal.

    C.   Water: Potable, non-staining and free of oils, acids,
         alkalis and organic matter.

2.02 EQUIPMENT

         A.   Brushes: Natural fiber bristle only. The use of
              wire brushes or steel wool is not permitted.

         B.   Wood spatula


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Verification of Conditions:  Examine the marble surface
         CAREFULLY to determine the cause of staining before
         proceeding with any cleaning operation.

3.02 PREPARATION

    A.   Protection:  Protect adjacent masonry using liquid
         strippable masking agent.

3.03 ERECTION, INSTALLATION, APPLICATION

    A.   General:  

         1.   Remove adhesives, soiling, stains and crusts from
              the masonry without damaging underlying material
              and to give all stone a clean, uniform appearance
              without blotches, streaks or other irregularities.
              Use the gentlest means to meet the cleaning
              objective.

         2.   If the exterior masonry has been previously
              subjected to inappropriately harsh and uneven
              cleaning, it is expected that the cleaning will
              reveal the original colors and textures of the
              brick, but that it will not completely correct the
              differential effects of the previous cleaning.
              Clean masonry to remove adhesives, soiling, stains
              and crusts to the extent feasible without further
              damaging it.

    C.   Remove large accumulations by mechanical scraping with a
         wood spatula taking care to avoid damage to masonry.

    D.   Brush apply solvent-based water rinse-able cleaner with
         a fine bristle brush to area damaged by tape residue.
         Allow to dwell for three to five minutes. Agitate with a
         stiff fiber bristle brush as necessary.

    E.   Thoroughly rinse with low pressure water (400 psi).

    F.   Repeat application to remove persistent stains and deeply
         embedded residues.

    G.   For guidance in removing adhesive residue by poulticing
         with a solvent, see 04455-23-R.  

                        END OF SECTION