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Historic Preservation - Technical Procedures

Spectitle:

Repairing Damaged Wood Veneer

Procedure code:

0644006R

Source:

Developed For Hspg (Nps - Sero)

Division:

Wood And Plastics

Section:

Wood Ornaments

Last Modified:

02/24/2012

Details:

Repairing Damaged Wood Veneer



REPAIRING DAMAGED WOOD VENEER


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on making repairs to
         loose, blistered or missing interior wood veneer.

    B.   Interior wood veneer may become damaged as a result of
         moisture seeping under the surface.

    C.   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).


PART 2---PRODUCTS

2.01 MATERIALS

    A.   Wood glue

    B.   Waxed paper

    C.   Solvent to remove old glue - such as a commercial
         wallpaper remover

    D.   Wood veneer patch to match type and grain of original

    E.   Hot, damp rags to loosen veneer

2.02 EQUIPMENT

    A.   Knife to slice or cut veneer

    B.   Clamps

    C.   Putty knife to pry end veneer

    D.   Pencil or knife to trace patch shape onto damaged veneer
         area


PART 3---EXECUTION

3.01 PREPARATION

    A.   Surface Preparation:  Mask or cover adjacent surfaces and
         permanent equipment during repair and maintenance.
         Coverings must be adhered without adhesive tape or nails.
         Impervious sheeting that produces condensation shall not
         be used.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   For Loose or Blistered Wood Veneer:

         1.   Slice an opening parallel to veneer.

         2.   Work glue under blister with flexible knife.  Press
              blister flat and remove excess glue.

         3.   Clamp until glue sets.  Use wood blocking when
              clamping to protect veneer surface.  Place a sheet
              of waxed paper between veneer and wood blocking to
              prevent gluing blocking to veneer.

         4.   For veneer edges, pry up end slightly with putty
              knife.  Remove all old glue and debris from under
              edge and reglue as above.

              1.   To remove old glue, score residue with knife;
                   sponge on solution of commercial wallpaper
                   remover.

              2.   Allow to soak into adhesive until residue has
                   softened; remove with a putty knife.

              3.   If adhesive is water soluble, a wallpaper
                   steamer may be used to soften the adhesive.

    B.   For Missing Wood Veneer:

         1.   Locate a patch from an inconspicuous area or new
              stock.  Make patch slightly larger than damaged
              area and match color and grain direction.

         2.   Loosen with moisture or heat or both.  Cut
              irregularly shaped patch, preferably along grain
              lines.

         3.   Trace shape of patch onto veneer area to be
              repaired and cut out damaged veneer area.  Glue
              patch in place and clamp as above.

                         END OF SECTION