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Historic Preservation - Technical Procedures

Spectitle:

Regrouting Ceramic Tile

Procedure code:

0931008R

Source:

Ohj - March 1984

Division:

Finishes

Section:

Ceramic Tile

Last Modified:

02/24/2012

Details:

Regrouting Ceramic Tile



REGROUTING CERAMIC TILE


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on regrouting ceramic
         tile where the grout is deteriorating, loose or missing.

         NOTE:  EXTENSIVE REGROUTING OF TILE WORK SHOULD BE DONE
         BY A SKILLED MASON.

         NOTE:  WHERE TILE MEETS A DISSIMILAR MATERIAL, CAULK OR
         SEALANT SHOULD BE USED INSTEAD OF GROUT.

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


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   American-Olean Tile Co.
         1000 Cannon Ave.
         P.O. Box 271
         Lansdale, PA  19446-0271
         215/855-1111

    B.   The Stanley Gold-blatt Tool Co.
         511 Osage Ave.
         Kansas City, KS  66105-2198
         913/621-3010

    C.   Harrington Tool Co.
         P.O. Box 39879
         Los Angeles, CA  90039
         818/552-4020

    D.   Marshalltown Trowel Co.
         P.O. Box 738
         Marshalltown, IA  50158
         515/753-5999

2.02 MATERIALS

    A.   Pre-mixed grout - either Portland Cement or Organic
         grout.  Available from lumber yards or tile supply stores
         such as American-Olean Tile Co. or U.S. Gypsum Co., or
         approved equal.

    B.   Clean, potable water

    C.   Kraft paper or grocery bags

2.03 EQUIPMENT

    A.   Dental pick

    B.   Grout saw (Harrington Tool Co., American-Olean Tile Co.).
         Also available from hardware stores or home centers.

    C.   Tile grouting float (Marshalltown Trowel Co., The Stanley
         Gold-blatt Tool Co.).  Also available from hardware
         stores or home centers, OR window squeegee.

    D.   Tempered plexiglass jointers - for tooling narrow tile
         joints.  Available in different sizes from building
         supply stores.

    E.   Grout bags.  Available in two sizes from tile supply
         stores.

    F.   Clean natural fiber rags, or sponges

    G.   Stiff bristle brushes (no iron wire)

    H.   Goggles


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.   Remove loose grout using a dental pick and grout saw.
         Clear the joints to at least 1/8" deep and form a
         squared-off bottom to receive the grout.

    B.   Brush out or vacuum loose debris from the joints.

    C.   Mix grout thoroughly following manufacturers'
         instructions.

    D.   For Portland Cement Grout:

         1.   Dampen joints to receive grout.

         2.   Apply grout using a tile grouters' float, forcing
              the grout deep into the joints, or apply by
              squeezing grout into tile joints through grout
              bags.

         -OR-

         For Organic Grout:

         1.   Apply grout using a window squeegee, or apply by
              squeezing grout into tile joints through grout
              bags.

    E.   Wipe off excess grout and allow to set until it feels
         firm.

    F.   Clean the tile surface with a damp sponge.

    G.   Tool joints at curved edges with a plexiglass joint tool.
         Square-edged tiles can be filled flush with the tile
         surface.

    H.   Damp cure the regrouted area for at least 72 hours.
         Cover the area with Kraft paper or grocery bags.  DO NOT
         USE PLASTIC SHEETING.

    I.   When dry, remove any residue from the tile surface by
         wiping with a clean, dry cloth.

3.03 PROTECTION

    A.   For the first month after regrouting, wash the tile
         surface every 2-3 days with warm water and bar soap (such
         as Ivory), rinse thoroughly with clean, clear water and
         dry with a clean, soft cloth.

    B.   DO NOT USE DETERGENT ON THE TILE SURFACE UNTIL THE GROUT
         HAS FULLY CURED - APPROXIMATELY 30 DAYS.

                             END OF SECTION