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Historic Preservation - Technical Procedures

Spectitle:
Cleaning And Repainting Exterior Aluminum

Procedure code:
0501029R

Source:
National Capitol Region Specifications - Va Building

Division:
Metals

Section:
Metal Materials

Last Modified:
02/24/2012

Details:
Cleaning And Repainting Exterior Aluminum



CLEANING AND REPAINTING EXTERIOR ALUMINUM


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on cleaning polish-
         finished, bare satin-finished, and non-finished exterior
         aluminum, and repainting.

    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).  

1.02 QUALITY ASSURANCE

    A.   Submit all cleaning products to the Contracting Officer
         for approval prior to use on the job.

    B.   Test cleaning areas will be approved by the Contracting
         Officer before any large scale cleaning is begun.

    C.   Standards: Architectural Aluminum Metals Association
         Guidelines for the Cleaning of Aluminum, including
         specification 609.1 (available from the AAMA, 35 East
         Wacker Drive, Chicago IL 60601).

    D.   Follow paint manufacturer's printed instructions for
         surface preparation, application and clean up.

1.03 PROJECT/SITE CONDITIONS

    A.   Existing Conditions:

         1.   All painting shall be executed at a temperature
              between 50 F and 85 F at a relative humidity below
              60%.

         2.   If mild acid is used, protect adjacent surfaces
              from run-off.


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   The Procter & Gamble Company
         P.O. Box 599
         Cincinnati, OH  45201
         513/983-1100

    B.   ProSoCo, Inc.
         755 Minnesota Avenue
         P.O. Box 1578
         Kansas City,  KS  66117
         800/255-4255 or 913/281-2700

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

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

2.02 MATERIALS

    A.   Cleaners:

         1.   Mild soap, such as "Ivory Liquid" (Procter and
              Gamble), or approved equal.

         2.   Phosphoric acid cleaner with water, such as "Sure
              Klean Aluminum Cleaner" (ProSoCo, Inc.), or
              approved equal.

    B.   Scrub-brushes shall be natural (non-metallic), bristle
         only.

    C.   Paint:

         1.   Primer: Alkyd-base, such as "Zinc Chromate Primer"
              (Sherwin Williams), or approved equal.

         2.   Finish Coats (2): Alkyd-base, such as "Industrial
              Enamel" (Sherwin Williams), or approved equal.

    D.   Metal Filler: Two-part epoxy metal filler, putty-grade,
         such as "Plastic Steel A" (Devcon Corporation), or
         approved equal.


PART 3---EXECUTION

3.01 PREPARATION

    A.   Protection:  Prior to beginning work, mask and protect
         all surfaces which would be altered or damaged by the
         cleaning operation.

    B.   Surface Preparation: Determine that surfaces to which
         paint is to be applied are even, smooth, sound, clean,
         dry and free from defects affecting proper application.
         Contact the Contracting Officer after surfaces which are
         to be repainted have been cleaned, made smooth, and
         before any paint is applied.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Cleaning Aluminum:

         1.   Wash all aluminum surfaces with mild detergent such
              as "Ivory Liquid" and clean water using a damp
              sponge, soft cloth, or if necessary, a natural
              bristle brush and light pressure. Wipe dry with
              clean cloth.

         2.   Should stronger cleaning methods be required, a
              dilute phosphoric acid cleaner, such as "Sure-Klean
              Aluminum Cleaner, pH 0.9" can be used, following,
              carefully, the manufacturer's written instructions.

    B.   Painting Aluminum:

         1.   Remove all paint, rust and scale from all steel
              surfaces, especially undersides and hidden
              locations, by mechanical and manual methods as
              necessary down to bright metal removing all traces
              of rust and scale.

         2.   Replace or repair any badly deteriorated pieces of
              metal work to match the original in size, shape and
              location.

         3.   Clean the bare metal of all oily or greasy residue
              with a degreaser, such as trichlorethylene
              available commercially in standard metal
              degreasers.

         4.   Fill all small holes, depressions and cracks with
              metal filler following the manufacturer's written
              directions. Finish all filled areas by sanding
              flush after curing time has elapsed.

         5.   Prime all metal within two hours of cleaning down
              to bare metal using color obviously different from
              the finish color.

         6.   Brush-apply two finish coats of paint.

                         END OF SECTION