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Historic Preservation - Technical Procedures

Spectitle:
Repainting Steel Windows

Procedure code:
0851001R

Source:
Hsr - Departmental Auditorium Bldg/Wash, Dc - Grier, Brown..

Division:
Doors And Windows

Section:
Steel Windows

Last Modified:
02/24/2012

Details:
Repainting Steel Windows



REPAINTING STEEL WINDOWS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on stripping steel
         windows of all paint build-up, cleaning and repainting
         the steel and recaulking joints between metal and
         masonry.

    B.   This procedure should be used in conjunction with 05010-
         05-R "Cleaning/Removing Paint from Wrought Iron, Cast
         iron and Steel Using Mechanical/Abrasive Methods", which
         is frequently cross-referenced throughout this procedure.

    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 MANUFACTURERS

    A.   Devcon Corporation
         30 Endicott Street
         Danvers, MA  01923
         800/933-8266

    B.   Fisher Scientific Company
         711 Forbes Avenue
         Pittsburgh, PA  15219
         800/388-8355 or 412/562-8300

    C.   The Sherwin Williams Co.
         101 Prospect Ave, N.W.
         Cleveland, OH  44101
         216/566-2000

2.02 MATERIALS

    NOTE: In addition to the materials listed below, see those
    items listed in 05010-05-R.

    A.   Primer:  Alkyd gloss; color should be distinct from base
         coat finish.

    B.   Paint:  Alkyd gloss; base coat color should be distinct
         from both primer and finish coat; finish coat color
         should match original.

    C.   Degreaser/Standard Solvent

    D.   Metal Filler:  Two-part epoxy metal filler, putty grade.

    E.   Backer Rod:  Polyethylene, compressible rod; size should
         be 50% larger in diameter than joint.

    F.   Sealant:  Polyurethane sealant, to match color of window
         paint.

    G.   Weatherstripping:  To match existing weatherstripping
         materials.

    H.   Clean, potable water

    I.   Clean, dry cloths

2.03 EQUIPMENT

    NOTE: In addition to the equipment listed below, see those
    items listed in 05010-05-R.

    A.   Wire brush

    B.   Paint brushes

    C.   Sandpaper


PART 3---EXECUTION

3.01 PREPARATION

    A.   Protection:  Protect adjacent masonry and glass from
         damage during work by providing temporary covers of
         cardboard or fiberboard; hold boards in place using
         heavy-duty strapping tape or wood bracing.  See also
         05010-05-R for other protection measures to take when
         performing this kind of work.

    B.   Surface Preparation:

         1.   Remove paint, rust and scale from steel windows by
              scraping or sanding.  USE CAUTION TO PREVENT
              PITTING OR ABRASION OF METAL SURFACES.  See 05010-
              05-R, Section 3.03 A. and 3.03 B. for additional
              guidance.

         2.   Remove caulking between metal and masonry by hand.
              See 07900-01-R for additional guidance.

         3.   Using a wire brush, remove dirt, grease and
              corrosion from the metal surfaces.  Air-blast any
              residual grit from the surface. See 05010-05-R,
              Section 3.03 C. for guidance.

         4.   Repair or replace deteriorated pieces of metal to
              match existing.  Repair or replace damaged or
              missing hardware to match existing.

         5.   Clean bare metal with a degreaser such as a mixture
              of 75% toluene, 24% acetone, and 1% butyl acetate
              (Fisher Scientific Company), or approved equal.

         6.   Fill small holes and other imperfections with a
              metal filler such as "Plastic Steel" (Devcon), or
              approved equal.  See also 05010-01-R for guidance.

         7.   After metal filler has cured, sand flush with the
              surface.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Apply primer to metal surfaces such as "Kromik Metal
         Primer" (Sherwin Williams), or approved equal.  Use a
         color distinctly different from the finish color.

         NOTE:  METAL MUST BE PRIMED WITHIN 2 HOURS OF CLEANING,
         TO AVOID CORROSION.

    B.   Seal any open joints between metal features using backer
         rods and sealant.  Finish joint smooth and concave; color
         should match paint color.  Wipe off excess sealant from
         the face of the metal and/or stone.  See 07900-01-R for
         additional guidance.

    D.   Brush apply 2 coats of paint to the steel such as
         "Metalstic II Enamel" (Sherwin Williams), or approved
         equal.  See also 05010-13-S and 09900-07-S for guidance.

         1.   Apply each coat evenly at a rate recommended by the
              manufacturer.  

         2.   Cover surfaces completely to provide a uniform
              color and clean, sharp appearance, with no
              overlaps.

         NOTE:  ALLOW EACH COAT TO THOROUGHLY DRY BEFORE APPLYING
         THE NEXT COAT.

3.03 ADJUSTING/CLEANING

    A.   Immediately remove any paint which has spilled or
         spattered on adjacent surfaces.

                         END OF SECTION