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Historic Preservation - Technical Procedures

Spectitle:

Routine Cleaning And Stain Removal Of Ceramic Tile

Procedure code:

0931006R

Source:

Hspg Prepared For Nps - Sero

Division:

Finishes

Section:

Ceramic Tile

Last Modified:

02/24/2012

Details:

Routine Cleaning And Stain Removal Of Ceramic Tile



ROUTINE CLEANING AND STAIN REMOVAL OF CERAMIC TILE


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


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on the routine
         cleaning and removal of miscellaneous stains from
         ceramic tile including mildew, blood, ink and
         beverages.  This procedure may be used on both glazed
         or unglazed tiles.

    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 before doing this
         procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).


PART 2---PRODUCTS

2.01 MATERIALS

    NOTE:  Chemical products are sometimes sold under a common
    name.  This usually means that the substance is not as pure
    as the same chemical sold under its chemical name.  The
    grade of purity of common name substances, however, is
    usually adequate for stain removal work, and these products
    should be purchased when available, as they may be less
    expensive.  Common names are shown below by an asterisk (*).

    A.   All-purpose cleaner such as "Mr. Clean," "Top Job,"
         "Fantastik," "Lestoil," or equivalent.

    B.   Commercial cleaner such as "Tilex," or equivalent.

    C.   White vinegar

    D.   Non-abrasive household scouring agent such as "Ajax
         Liquid," "Liquid Comet," or "Bon Ami," or equivalent.

    E.   Undiluted neutral soap such as "Ivory", "Joy" or
         equivalent.

    F.   Household bleach:

         CAUTION:  DO NOT MIX AMMONIA WITH CHLORINE BLEACHES, A
         POISONOUS GAS WILL RESULT!  DO NOT USE BLEACH ON BIRD
         DROPPINGS.

         1.   Other chemical or common names include Sodium
              Hypochlorite; Bleaching solution*; Laundry
              bleach*; Solution of chlorinated soda*.

         2.   Potential Hazards:  CORROSIVE TO FLESH.

         3.   Available from chemical supply house, grocery
              store or supermarket, hardware store or janitorial
              supply distributor.

    G.   Trisodium Phosphate:

         NOTE:  THIS CHEMICAL IS BANNED IN SOME STATES SUCH AS
         CALIFORNIA.  REGULATORY INFORMATION AND ALTERNATE OR
         EQUIVALENT CHEMICALS MAY BE REQUESTED FROM THE
         ENVIRONMENTAL PROTECTION AGENCY (EPA) REGIONAL OFFICE
         AND/OR THE STATE OFFICE OF ENVIRONMENTAL QUALITY.

         1.   Strong base-type powdered cleaning material sold
              under brand names.

         2.   Other chemical or common names include Sodium
              Orthophosphate; Tribasic sodium phosphate;
              Trisodium orthophosphate; TSP*; and Phosphate of
              soda*.

         3.   Potential Hazards:  CORROSIVE TO FLESH.

         4.   Available from chemical supply house, grocery
              store or supermarket or hardware store.

    H.   Laundry detergent

    I.   Clean, potable water

2.02 EQUIPMENT

    A.   Clean natural fiber rags, or sponges

    B.   Nylon scouring pad

    C.   Stiff bristle brushes (no iron wire)


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Examine the ceramic tile surface carefully to detect
         the type and cause of staining before proceeding with
         any cleaning operation.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   For Periodic Cleaning:

         1.   Wipe tiles with a damp sponge and all-purpose
              cleaner.

              -OR-

              Spray on "Tilex" following manufacturers'
              instructions.

              -OR-

              Wipe tiles with a 50/50 solution of white vinegar
              in water.

    B.   For More Persistent Dirt Build-up:

         1.   Scrub the surface with a nonabrasive household
              scouring agent.

              -OR-

              Scrub the surface with an all-purpose cleaner and
              a nylon scouring pad.

    C.   For Neglected Tile Surfaces:

         1.   Coat tile with an undiluted neutral soap.

         2.   Allow to dry and stand for several hours.

         3.   Mix additional soap with warm water and wipe over
              the tile surface.

         4.   Sprinkle the surface with scouring powder and
              scrub with a stiff bristle brush.

         5.   Thoroughly rinse the surface with clean, clear
              water and a sponge.

         6.   Dry with a clean, soft cloth or towel.

    D.   For Mildew or Other Miscellaneous Stains:

         1.   Mix 1 qt. household bleach, 3 qts. water, 3 oz.
              TSP and 1 oz. detergent.

         2.   Scrub mixture into the surface using a stiff
              bristle brush or nylon scrubbing pad.

         3.   Follow by scrubbing with a scouring powder.

         4.   Rinse thoroughly with clean, clear water and dry
              with a clean, soft cloth or towel.

                             END OF SECTION