Historic Preservation - Technical Procedures

Replacing Damaged Or Missing Cork Floor Tiles
Procedure code:
National Capitol Region Specifications - Switzer Building
Resilient Tile Flooring
Last Modified:
Replacing Damaged Or Missing Cork Floor Tiles
Last Modified:




    A.   This procedure includes guidance on the replacement of
         all cracked, broken, worn, curled or missing cork tiles
         with new to match existing. This includes the removal of
         cementitious patching materials.  T= his procedure may also
         be used for the installation of a new cork tile floor to
         match the original design and configurat= ion.

    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

         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).  


    A.   Product Data: Submit manufacturer's technical data for
         each type of synthetic flexible composite flooring and

    B.   Samples for Initial Selection Purposes: Submit
         manufacturer's standard color charts in form of actual
         sections of synthetic flexible composite flooring,
         including accessories, showing full range of colors and
         patterns available for each type of synthetic flexible
         composite flooring required.

    C.   Samples for Verification Purposes: Submit the following
         samples of each type, color and pattern of synthetic
         flexible composite flooring required, showing full range
         of color and pattern variations.

         1.   Full size tile samples.

         2.   Other materials as requested.<= br>
    D.   Certification for Fire Test Performance: Submit
         certification from an independent testing laboratory
         acceptable to authorities having jurisdi= ction that
         synthetic flexible composite flooring complies with fire
         test performance requirements.

    E.   Maintenance Instructions: Submit two copies of your
         manufacturer's recommended maintenance practices for each
         type of synthetic flexible composite flooring and
         accessory required.

    F.   Work Description: Prior to commencing the work,
         Contractor shall submit to the Contracti= ng Officer's
         representative a written description of the entire
         methods and procedures proposed for all the work to be
         carried out including, but not limited to, preparation of
         substrate, cutting out existing tiles, replacement,
         installation of new tiles and cleaning of existing tiles.

    G.   Methods of Protection: Prior to commencing cleanin= g
         operations, the Contractor shall submit to the
         Contracting Officer's representative for review a written
         description of proposed materials and methods of
         protection for preventing damage to adjacent materials
         and the building interior during the cleaning and
         replacement of the cork tiles.


    A.   The general objective of the installation of new cork
         tiles is to recreate the original design intent of the
         primary historic spaces. Refer to the original design
         drawings, historic photographs or physic= al evidence
         remaining in the building for the instal= lation patterns.

    B.   The general objective for replacement of cork floor tiles
         is to match the existing floor color, pattern and the
         existing floor tiles, and all other respects so that the
         new floor tiles are not visible in the overall view of
         the floors.

    C.   The general objectives for cleaning the cork tile floor
         are to remove dirt, grime and protective coatings from
         the surface without damaging the underly= ing material, and
         to give all the flooring a clean uniform appearance.

    D.   Contractor:

         1.   The work of this section shall be performed by an
              installer who is certified in writing by the cork
              tile manufacturer as qualified to complete the
              scope of work described.

         2.   Work in this section shall be performed by a
              Contractor possessing a minimum of three (3) years
              of specialized experience in the installation of
              synthetic flexible compos= ite flooring. 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 on the firm's experience.

    E.   In the event that a Contractor wishes to modify any
         methods specified in this section, he shall submit his
         proposal in writing for consideration and review. The
         Contracting Officer's representative will have the right
         to ask for samples before final approval. Any such
         modifications or changes shall be a no additional cost to
         the Government.

    F.   Regulatory Requirements:

         1.   Comply with municipal and Federal regulations
              governing the cleaning, chemical waste disposal,
              scaffolding protection to adjacent properties and

         2.   Refer to Federal Government Specification Section
              01546, Health and Safety, and comply with all the
              section requirements.

    G.   Samples: The Contractor shall clean a 4'-0" by 4'-0" bay
         of the existing cork floor tile on each different color
         for review by the Contracting Officer's representative.
         Locations of sample floor bays to be selected by the
         Contracting Officer's representative. These cleaned cork
         floor tile bays are to be protected by the Contractor and
         will be used for matching replacement cork floor tiles.

    H.   The Contractor shall prepare a sample bay, approxi= mately
         4'-0" by 4'-0",  of repla= ced cork floor tile. The sample
         bay should be made to match the existing cleaned adjacent
         cork floor tile in all respects. The Contracting
         Officer's representative shall select the location for
         the sample of replaced cork floor tile.<= br>

    A.   Environmental Requirements:  Maintain minimum temperature
         of 65 F (18 C) in spaces to receive synthetic flexible
         composite flooring for at least 48 hours prior to
         installation, during installation and for not less than
         48 hours after installation. Store synth= etic flexible
         composite flooring materials in spaces where they will be
         installed for at least 48 hours before beginning
         installation. Subsequently, maintain minimum temperature
         of 55 F (13 C) in areas where work is completed.


    A.   Coordinating Work:  Install synthetic flexible composite
         flooring and accessories after other finishing
         operations, including painting, have been completed.


    A.   The contractor shall guarantee and maintain the cork tile
         floors in good condition for a period of two years.


    A.   Extra Stock:

         1.   Deliver stock of maintenance materials to
              Government. Furnish maint= enance materials from same
              manufactured lot as mater= ials installed and
              enclosed in protective packaging with appropriate
              identifying labels.

         2.   Tile Flooring: furnish not less than one box for
              each 50 boxes, or fraction thereof, for each type,
              color, pattern and size installed.



    A.   Dodge-Regapol, Inc.
         P.O. Box 989
         Cornel and Manor Streets
         Lancaster, PA 17603

    B.   Permagrain Products, Inc.
         22 West State Street
         Media, PA 19063


    A.   Cork Floor Tiles such as "Dodge cork tile&quo= t; (Dodge-
         Regapol, Inc.), "Cork-o-plast" (Permagrain Products,
         Inc.), or approved equal; color and pattern selected to
         be consistent with existing cork tile flooring.  

         1.   Cork tile shall be not less than =AB" thick,
              weighting not less than 18 ounces per square foot,
              made of the best quality of clear cork shavings.

         2.   The cork shall have no added cementing or coloring
              materials and must be free from all foreign
              substances, be thoroughly consolidated under heavy
              pressure, and thoroughly baked.

         3.   The tile must be free from pits and be impervious.

    B.   Adhesives (Cements): Waterproof stabilized-type to be
         recommended by the manufacturer of the synthetic flexible
         composite flooring to be installed.

    C.   Concrete Slab Primer: Non-staining type as recomme= nded by
         the flooring manufacturer.

    D.   Leveling and Patching Compounds: Latex-type as
         recommended by the manufacturer.



    A.   Verification of Conditions:  

         1.   Require installer to inspect subfloor surfaces to
              determine that they are satisfactory. A
              satisfactory subfloor surface is defined as one
              that is smooth and free from cracks, holes, ridges,
              coatings preventing adhes= ive bond, and other
              defects impairing perform= ance or appearance.

         2.   Work shall not proceed until the subfloor surfaces
              have had all dirt, foreign matter, old mastics and
              adhesives removed.


    A.   Surface Preparation:  Prepare subfloor surfac= es as

         1.   Use leveling and patching compounds as recommended
              by synthetic flexible composite flooring
              manufacturer for filling small cracks, holes and
              depressions in subfloors.=

         2.   Remove coatings from subfloor surfaces that would
              prevent adhesive bond, including curing compounds
              incompatible with flooring adhesives, paint, oils,
              waxes and sealers.

         3.   Broom clean or vacuum surfaces to be covered and
              inspect subfloor.


    A.   General:

         1.   Install synthetic flexible composite flooring using
              method indicated in strict compliance with
              manufacturer's printed instructions. Extend
              synthetic flexible compos= ite flooring into toe
              spaces, door reveals, and into closets and similar

         2.   Scribe, cut and fit synthetic flexible composite
              flooring to permanent fixtures, built-in furniture
              and cabinets, pipes, outlets and permanent columns,
              walls and partitions.

         3.   Tightly cement synthetic flexi= ble composite
              flooring to sub-base without open cracks, voids,
              raising and puckering at joints, telegraphing of
              adhesive spreader marks or other surface
              imperfections. Hand roll synthetic flexible
              composite flooring at perimeter of each covered
              area to assure adhesion.<= br>
    B.   Installation of Tile Floors:

         1.   Lay tile from center marks established with
              principal walls, discount= ing minor offsets, so that
              tile at opposite edges of room area of equal width.
              Adjust as necessary to avoid use of cut widths less
              than one-half tile at room perimeters. Lay tile
              square to room axis, unless otherwise shown.

         2.   Match tiles for color and pattern by using tile
              from cartons in same sequence as manufactured and
              packaged if so numbered. Cut tile neatly around all
              fixtures. Broken, cracked, chipped or deformed
              tiles are not acceptable.=

              a.   Lay tile to follow the existing floor tile
                   patte= rn or as recommended in the original
                   drawi= ngs.

         3.   Cork tile shall be laid in waterproof cement,
              thoroughly weighted with sand bags until cement is
              set. Adhere tile flooring to substrate using full
              spread of adhesive applied in compliance with
              flooring manufacturer's directions.

         4.   At completion, tile shall be sand papered and
              rubbed to an even polished surface.


    A.   Perform the following operations immediately upon<= br>          completion of synthetic flexible composi= te flooring:

         1.   Sweep or vacuum floor thorough= ly.

         2.   Do not wash floor until time period recommended by
              synthetic flexible compos= ite flooring manufacturer
              has elapsed to allow synthetic flexible composite
              flooring to become well sealed in adhesive.

         3.   Damp mop floor being careful to remove black marks
              and excessive soil.

         4.   Remove any excess adhesive or other surface
              blemishes, using appropri= ate cleaner recommended by
              synthetic flexible compos= ite flooring


    A.   Apply protective floor polish to synthetic flexibl= e
         composite flooring surfaces free from soil, excess
         adhesive or surface blemishes. Use comme= rcially available
         metal cross-linked acrylic product accep= table to
         synthetic flexible composite flooring manufacturer.

                         END OF SECTION
Last Reviewed 2012-02-24