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Historic Preservation - Technical Procedures

Spectitle:

Dutchman Repair Of Wood Floorboards

Procedure code:

0956003R

Source:

Hspg Prepared For Nps - Sero

Division:

Finishes

Section:

Wood Strip Flooring

Last Modified:

02/24/2012

Details:

Dutchman Repair Of Wood Floorboards



DUTCHMAN REPAIR OF WOOD FLOORBOARDS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on repairing small
         localized damage to wood floorboards by cutting out a
         geometric piece of the board slightly larger than the
         damaged area and replacing it with a piece of wood cut
         and fit to match.  This method of repair - called a
         dutchman - enables as much of the original material to be
         retained as possible.

    B.   This procedure may also be used for making small repairs
         to wood trim and may include filling holes left from
         heating or plumbing pipes.

    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).

1.02 DEFINITIONS

    A.   A wood floor surface can be either a series of connected
         planks or parquet (small wood pieces arranged in
         decorative patterns).  The wood used is either plain sawn
         or quarter sawn.  Plank flooring, the more common type,
         is assembled by joining: butt joint, tongue and groove,
         shiplap, doweled or spline.  Wood floors are usually
         secured to the under structure by countersinking nails,
         blind-nailing, or screwing and plugging.


PART 2---PRODUCTS

2.01 MATERIALS

    A.   Wood for dutchman (match existing material to be repaired
         including species, saw/grain)

    B.   Wood glue such as Elmer's or equivalent

    C.   Sandpaper

2.02 EQUIPMENT

    A.   Hammer

    B.   Chisel

    C.   Plane


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Remove damaged portion with hammer and chisel.  

         1.   Cut an irregular geometrically-shaped cavity in the
              wood that is slightly larger than the damaged area.
              Select a geometric shape that is easy to reproduce
              such as a diamond or trapezoid, but is not obvious
              to the eye (a plug in the shape of a circle or
              square is more apparent).

         2.   Bevel the edges of the cavity.

    B.   Fabricate a plug to match the surface cavity bevel from
         matching wood stock.  Make sure that the grain direction
         also matches.  Glue the plug into the cavity.

    C.   Allow the glue to dry, then plane or sand if necessary
         and refinish to match surrounding floor.

                             END OF SECTION