Lead Paint Removal >> How To Strip Lead Paint Off Wood

Methods for Removing Lead Paint Mechanical Methods: Mechanical (abrasive) methods of treating lead-painted surface shave two major drawbacks. They produce high levels of dangerous residue, and they have potential to damage the underlying substrate.SCRAPING: Traditional scraping with hand tools is a slow process that can remove lead coatings only How To Strip Lead Paint Off Wood with great effort. 

Aggressive scraping can gouge wooden surfaces and How To Strip Lead Paint Off Wood molding profiles. In general, scraping is best suited for use on completely flat surfaces.Scraping tends to create less dust than many other methods, though. Paint chips removed by scraping can be controlled much more easily than the more minute residue generated by other methods.

SANDING: Both hand sanding and power sanding generate extremely high levels of paint dust. Rotary, disk, and belt-sanding procedures, How To Strip Lead Paint Off Wood in addition to the problem of lead dust generation, can destroy carved work and molding profiles altogether. For these reasons,power sanding procedures are usually not appropriate for surface preparation in situ,especially in occupied buildings. 

If the elements to be treated can be safely removed and taken to a controlled site for treatment, some sanding methods may be appropriate. Belt sanders can be used on flat stock, How To Strip Lead Paint Off Wood and orbital sanders, if used with great care, can be used with damage kept to a minimum. If off-site treatment is considered, proper care must betaken to remove features without damaging them.

To identify each element so that it can be restored to its proper location; How To Strip Lead Paint Off Wood and to re-install the treated elements in their proper places. High Efficiency Particulate Air (HEPA) equipped sanders, often used by professionals,help control the amount of lead dust put into the air. If power sanding is to be considered,HEPA equipment is strongly recommended.

BLASTING: All methods of abrasive blasting work on the principle of semi-controlled pulverization of the surface being treated. Under most conditions, How To Strip Lead Paint Off Wood the damage to the substrate will be irreparable. 3 It does not matter whether the blasting is dry, wet, fine-grit,coarse-grit, low-pressure, or high-pressure; or whether the aggregate is sand, crushed walnut shells, glass beads, water, or air: abrasive blasting is destructive. 

Abrasive blasting will remove lead-based paint, but it will also create tremendous amounts of lead dust. The dust will permeate interior spaces, and How To Strip Lead Paint Off Wood in exterior applications it can be carried over a wide area, contaminating neighboring properties. Because of these potent hazards, abrasive blasting should never be used to remove lead paint.

Heat Methods: Blowtorches and other open-flame techniques are extremely dangerous and should never be used. 4 In addition to the very real danger of burning down the building and the threat to human lives, How To Strip Lead Paint Off Wood open flame techniques produce very high levels of toxic lead dust and fumes. These fumes can be easily inhaled.

Heat guns and heat plates generate lower levels of heat than do torches. Even at these lower levels of heat, there is still a danger of generating lead fumes, and of igniting sawdust, construction debris, animal nests, or other materials. Heat guns and How To Strip Lead Paint Off Wood heat plates should only be used under carefully controlled circumstances.

Chemical Methods: Standard paint-stripping chemicals include solvents (methylenechloride) and caustics (sodium hydroxide or potassium hydroxide.) Methylene chloride is toxic, How To Strip Lead Paint Off Wood and must be handled with appropriate precautions. Chemical stripping can be done on-site or offsite. Each procedure has its own problems and recommended precautions.

5 ON SITE: Methylene chloride is the basis for most solvent-based paint strippers.Methylene chloride is particularly effective on wooden surfaces. Because it causes little damage to wooden surfaces, it is often used for older buildings. Good ventilation,protective clothing, and respirators are essential when using methylene chloride, How To Strip Lead Paint Off Wood since it can cause severe burns, liver and heart damage, and possibly cancer. 

Strict control over the work site is essential when using this toxic chemical stripper. Caustic paint removers tend to be less toxic, but they have a greater tendency to pit wooden surfaces and raise wood grain. The runoff from chemical stripping procedures is often hazardous, How To Strip Lead Paint Off Wood and must be treated accordingly. 

When the runoff includes lead paint residue, even greater care must be taken to dispose of it properly. Generally, these methods generate much less paint dust than abrasive or thermal methods.OFF SITE: In many cases, painted elements can be removed from buildings and How To Strip Lead Paint Off Wood treated at commercial stripping joints. 

Elements are immersed in tanks of chemical remover, either solvent-based or caustic, scrubbed down and returned to the building. This method will not create dust or How To Strip Lead Paint Off Wood fumes that are the chief hazard of on-site treatment, and the toxic chemicals are restricted to controlled areas. 

Other problems associated with off-site treatment of affected architectural elements include limiting the damage to the elements as they are removed; How To Strip Lead Paint Off Wood the proper re-installation of the treated elements in their correct locations and configurations; and the limitations to the size of elements that can be removed for treatment. 

The Department of Historic Resources can answer questions on lead paint. Contact Bill Crosby at (804) 367-2323 if you desire further How To Strip Lead Paint Off Wood information. References Center for Environmental Health, Maryland Department of the Environment. "Lead Paint Hazard Fact Sheet #1." October 1990. Lawrence Chadzynski, R.S., M.P.H. Manual for the Identification and Abatement of Environmental Lead Hazards. 

June 1986. Sara B. Chase. Preservation Brief No. 28: Painting Historic Interiors. Washington, D.C.: National Park Service, U.S. Department of the Interior, 1992.Historic Buildings How To Strip Lead Paint Off Wood and the Lead Paint Hazard. Hartford, Connecticut: Connecticut Historical Commission, 1990.HUD's Lead-Based Paint Interim Guidelines for Hazard Identification and Abatement in Public and Indian Housing. 

18 April 1990.J. Brent Kynoch, Dr. Howard Kipen, and Dr. James Craner. "Lead-Based Paint."  , January-February 1993, pp. 17-20. Marylee MacDonald. "Getting Rid of Lead." Old-House Journal, Vol. XX, No. 4, July-August 1992. How To Strip Lead Paint Off Wood National Park Service, U.S. Department of the Interior. "Reviewing Preservation Projects With Lead Paint Issues." 

Interim Guidance Paper, 8 August 1990.Marcus Vitruvius Pollio. The Ten Books On Architecture. Circa 25 B.C.; translation edition, How To Strip Lead Paint Off Wood MorrisHicky Morgan, editor, Cambridge, Massachusetts: Harvard University Press, 1914.U.S. Department of Labor/Occupational Safety and Health Administration/U.S. Department of Health and Human Services/National Institute for Occupational Safety and Health.

Working with Lead in the Construction Industry. Washington, D.C., April, 1991.Kay D. Weeks and How To Strip Lead Paint Off Wood David W. Look, A.I.A. Preservation Brief No. 10: Exterior Paint Problems on Historic Woodwork. Washington, D.C.: National Park Service, U.S. Department of theInterior, 1982.Frank S. Welsh. "Lead Paint in American Buildings." Frank S. Welsh, Architectural CoatingsConsultant, Bryn Mawr, Pennsylvania, 1991.

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