The Secretary of the Interior’s Standards call for the gentlest effective cleaning method. Following substrate testing, laser parameters can be selected to remove surface contaminants while reducing contact, moisture exposure, and impact on the underlying material. Review our laser cleaning safety procedures for controlled access, PPE, extraction, and protection of sensitive surroundings.
Evaluate pollution staining, soot, and biological growth on stone, brick, terra cotta, and stucco after material review and a representative test area. Laser cleaning may reveal earlier color or texture, but surface loss, color change, moisture condition, residue, and detail preservation depend on the material and parameters. Explore our laser brick and facade cleaning service. Primary source: U.S. National Park Service Preservation Briefs.
Clean suitable bronze, marble, granite, and cast-iron monuments, statues, and decorative elements. Remove surface oxidation, bird deposits, atmospheric buildup, and graffiti using a non-contact process. Patina preservation and substrate response are evaluated through testing and parameter selection.
"EPA RRP Lead-Safe Certified. New York project requirements credentialed. Fully insured. We hand you the compliance documentation along with the clean substrate."
Plan historic preservation with laser cleaning around the conservation objective and the condition of each material. Identify significant finishes, previous treatments, repairs and areas that need protection before selecting a trial.
For a proposed trial on ornamental metalwork, ask the preservation team to define the deposit to remove and the finish to retain. Record the starting condition, mark an inconspicuous area and agree on a review before further work.
For individual objects, review monument and antique restoration. For building surfaces, see masonry and facade cleaning. Send the material and conservation requirements through project review.
Historic-surface cleaning should begin with material identification and a small test area. Laser cleaning can be one option when parameters are matched to the substrate and contaminant, but it is not automatically the least aggressive or appropriate method for every historic surface. The project’s preservation requirements and acceptance criteria control method selection.
Primary source: U.S. National Park Service Preservation Briefs, including Brief 6 on abrasive cleaning.
Potentially, but not automatically. Limestone and brownstone vary in composition, finish, porosity, weathering, repairs, coatings, and moisture condition. Abrasive cleaning can damage historic masonry, and unsuitable laser parameters can also alter a surface. We require material review, a representative test area, and project-specific acceptance criteria. Primary source: U.S. National Park Service Preservation Briefs, including Brief 6.
For historic laser cleaning, review our laser safety procedures and OSHA laser hazard standards. Use these resources to plan site controls and responsibilities.