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Historic Preservation - Technical Procedures

Spectitle:

Surface Preparation Guidelines For Brick, Metal, Wood And Plaster

Procedure code:

0990008S

Source:

National Capitol Region Specifications - Old Executive Off

Division:

Finishes

Section:

Painting

Last Modified:

02/24/2012

Details:

Surface Preparation Guidelines For Brick, Metal, Wood And Plaster



SURFACE PREPARATION GUIDELINES FOR PAINTING BRICK, METAL, WOOD AND
PLASTER


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on preparing various
         surface types for repainting.  These include brick,
         metal, wood and plaster.

    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 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.   Red Devil, Inc.
         2400 Vauxhall Road
         Union, NJ  07083-1933
         201/688-6900
         800/423-3845

2.02 MATERIALS

    NOTE:  Chemical products are sometimes sold under a common
    name.  This usually means that the substance is not as pure as
    the same chemical sold under its chemical name.  The grade of
    purity of common name substances, however, is usually adequate
    for stain removal work, and these products should be purchased
    when available, as they tend to be less expensive.  Common
    names are indicated below by an asterisk (*).

    A.   Mineral spirits:

         1.   A petroleum distillate that is used especially as a
              paint or varnish thinner.

         2.   Other chemical or common names include Benzine* (not
              Benzene); Naphtha*; Petroleum spirits*; Solvent
              naphtha*.

         3.   Potential Hazards:  TOXIC AND FLAMMABLE.

         4.   Safety Precautions:

              a.   AVOID REPEATED OR PROLONGED SKIN CONTACT.

              b.   ALWAYS wear rubber gloves when handling
                   mineral spirits.

              c.   If any chemical is splashed onto the skin,
                   wash immediately with soap and water.

         5.   Available from construction specialties
              distributor, hardware store, paint store, or
              printer's supply distributor.

    B.   Water-soluble detergent

    C.   Clean, potable water

    D.   Sandpaper

    E.   Trisodium Phosphate (TSP)

         NOTE:  THIS CHEMICAL IS BANNED IN SOME STATES SUCH AS
         CALIFORNIA.  REGULATORY INFORMATION AS WELL AS
         ALTERNATIVE OR EQUIVALENT CHEMICALS MAY BE REQUESTED FROM
         THE ENVIRONMENTAL PROTECTION AGENCY (EPA) REGIONAL OFFICE
         AND/OR THE STATE OFFICE OF ENVIRONMENTAL QUALITY.

         1.   Strong base-type powdered cleaning material sold
              under brand names.

         2.   Other chemical or common names include Sodium
              Orthophosphate; Tribasic sodium phosphate;
              Trisodium orthophosphate; TSP*; Phosphate of soda*;
              (also sold under brand names such as Red Devil).

         3.   Potential Hazards:  CORROSIVE TO FLESH.

         4.   Available from chemical supply house, grocery store
              or supermarket or hardware store.

    F.   Chemical deglosser

    G.   White shellac, or other approved knot sealer

    H.   Primer

    I.   Varnish, or other approved sealer

2.02 EQUIPMENT

    A.   Wood and metal scrapers

    B.   Wire brushes (non-ferrous bristle)

    C.   Stiff bristle brushes



PART 3---EXECUTION

3.01 PREPARATION

    A.   Protection: Remove hardware, hardware accessories,
         machined surfaces, plates, lighting fixtures, and similar
         items in place and not to be finish-painted, or provide
         surface-applied protection prior to surface preparation
         and painting operations. Remove, if necessary, for
         complete painting of items and adjacent surfaces.
         Following completion of painting of each space or area,
         reinstall removed items.

    B.   Surface Preparation: Do not paint over dirt, rust, scale,
         grease, moisture, scuffed surfaces, or conditions
         otherwise detrimental to formation of a durable paint
         film.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Perform preparation and cleaning procedures in accordance
         with paint manufacturer's instructions and as herein
         specified, for each particular substrate condition.

    B.   Clean surfaces to be painted before applying paint or
         surface treatments. Remove oil and grease prior to
         mechanical cleaning. Program cleaning and painting so
         that contaminants from cleaning process will not fall
         onto wet, newly-painted surfaces.

         1.   Brick: Clean brick surfaces to be painted for loose
              or peeling paint, dirt, oil, or other foreign
              substances with scrapers, stiff bristle brushes and
              mineral spirits as required. Wash entire surface
              with a water-soluble detergent and rinse thoroughly
              with clean water to remove cleaner residue and
              soil.

         2.   Ornamental Metal: Clean ornamental metal surfaces
              to be painted of dirt, oil or other foreign
              substances with scrapers and solvent cleaners as
              required. Remove loose or peeling paint by gently
              wire brushing surfaces. Sandpaper smooth any rough
              edges created by removal of peeling or loose paint
              to create an even plane across surface.

         3.   Ferrous Metals: Clean ferrous surfaces, which are
              not galvanized or shop-coated, of oil, grease,
              dirt, loose mill scale and other foreign substances
              by solvent or mechanical cleaning.

              a.   Touch-up shop-applied prime coats wherever
                   damaged or bare, where required by other
                   sections of these specifications. Clean and
                   touch-up with same type shop primer.

         4.   Galvanized Surfaces: Clean free of oil and surface
              contaminants with non-petroleum-based solvent.

         5.   New Wood:

              a.   Clean wood surfaces to be painted of dirt,
                   oil, or other foreign substances with
                   scrapers, mineral spirits, and sandpaper, as
                   required. Sandpaper smooth those finished
                   surfaces exposed to view, and dust off. Scrape
                   and clean small, dry, seasoned knots and apply
                   thin coat of white shellac or other
                   recommended knot sealer, before application of
                   priming coat. After priming, fill holes and
                   imperfections in finish surfaces with putty or
                   plastic wood-filler. Sandpaper smooth when
                   dried.

              b.   Prime, stain or seal wood required to be job-
                   painted immediately upon delivery to job.
                   Prime edges, ends, faces, undersides, and
                   backsides of such wood, including cabinets,
                   counters, cases, and paneling.

              c.   When transparent finish is required, use spar
                   varnish for back priming.

              d.   Back prime paneling on interior partitions
                   only where masonry, plaster or other wet wall
                   construction occurs on backside.

              e.   Seal tops, bottoms, and cut-outs of unprimed
                   wood doors with a heavy coat of varnish or
                   equivalent sealer immediately upon delivery to
                   job.

         6.   Existing Wood:

              a.   Scrape existing wood surfaces to be painted
                   with a flat blade scraper to remove all
                   peeling or blistering paint finish. Sand
                   surface to a smooth finish, flush with
                   contiguous surfaces. To ensure bonding of new
                   paint material, clean surfaces free of dirt,
                   oil, dust or other foreign substances with
                   trisodium phosphate (TSP) cleaning solution.
                   Rinse thoroughly with clean water to remove
                   cleaner residue and soil. Lightly sand or
                   treat existing surfaces with a chemical paint
                   bonding agent.

              b.   Clean existing wood surfaces to receive a
                   clear finish with mineral spirits to remove
                   dirt, oil, or other foreign substances and
                   wipe with a clean cloth. Wipe entire surface
                   with a preimpregnated tack rag and immediately
                   apply finish.

         7.   Plaster:

              a.   Clean plaster surfaces to be painted for dirt,
                   oil or other foreign substances with scrapers,
                   mineral spirits and sandpaper. Wash entire
                   surface with a trisodium phosphate (TSP)
                   cleaning solution and rinse thoroughly with
                   clean water to remove cleaner residue and
                   soil.

              b.   Prepare plaster areas by first scraping the
                   entire surface to remove all loose paint of
                   finish plaster. Apply a bonding agent to
                   exposed areas and then apply complete skim
                   finish coat over the low areas to bring the
                   entire finished surface out flush with
                   adjacent firm and sound layers of plaster or
                   paint. Sandpaper smooth to create a flat plane
                   without bumps, cracks or depressions, ready to
                   receive paint.

    E.   Mix and prepare painting materials in accordance with
         manufacturer's directions.

    F.   Store materials not in actual use in tightly covered
         containers. Maintain containers used in storage, mixing
         and application of paint in a clean condition, free of
         foreign materials and residue.

    G.   Stir materials before application to produce a mixture of
         uniform density and stir as required during application.
         Do not stir surface film into material. Remove film and,
         if necessary, strain material before using.

3.03 ADJUSTING/CLEANING

    A.   During progress of work, remove from site discarded
         materials, rubbish, cans and rags at end of each work
         day.

    B.   Upon completion of painting work, clean window glass and
         other paint-spattered surfaces. Remove spattered paint by
         proper methods of washing and scraping, using care not to
         scratch or otherwise damage finished surfaces.

3.04 PROTECTION

    A.   Protect work of other trades, whether to be painted or
         not, against damage by painting and finishing work.
         Correct any damage by cleaning, repairing or replacing,
         and repainting, as acceptable to RHPO.

    B.   At the completion of work of other trades, touch-up and
         restore all damaged or defaced painted surfaces.

                         END OF SECTION