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Todd Dunning
Todd DunningJunior Optical Materials SpecialistUnited States
Optical materials for industrial photonics systems
Published
Jun 19, 2026

Brick Fireplace Laser Cleaning

Laser cleaning removes soot, creosote, and smoke staining from brick fireplace surfaces without abrasive media or chemical strippers. It does not repoint mortar joints or repair spalled brick faces, and it will not lighten fire-darkened mortar back to original color in a single pass. Historic hearths often pair this step with historic masonry restoration planning before any thermal work begins.

What This Video Shows

Short AhhoirJT1LA shows a Netalux laser clearing about 3/8 inch of pitch tar, creosote, and soot from an 80-year-old brick fireplace at roughly 415 mm standoff with repeated passes.

Materials that share a fireplace surround

Related Contaminants

Laser Cleaning Paint Coatings Without Hurting the Surface

Paint coatings come off [stucco](/materials/stucco-laser-cleaning) at 0.5–2 J/cm², while the stucco itself is injured at 8–14 J/cm², so a setting that removes paint has to stay near the low end of that range. The same logic runs through [laser paint coating removal](/applications/laser-paint-coating-removal-bay-area) on any host.

Atmospheric Soiling on Stone Laser Cleaning

Laser cleaning works on atmospheric soiling when the crust absorbs the pulse and the stone does not, but sandstone is the tight case: soiling lifts at **0.3–1.0 J/cm²** while the host is injured at **0.85–1.25 J/cm²**, so the setting has to be proven on a test piece cut from that same stone before any wall is cleaned.

Clear Atmospheric Rust Without Cooking the Steel

Iron oxide rust is removed from [steel](/materials/steel-laser-cleaning) at **0.1–0.5 J/cm²**, well under the **8–15 J/cm²** where the base metal starts to take damage, so a coupon cut from the actual part, not the color of the rust or any [mill scale](/contaminants/mill-scale-magnetite-laser-cleaning) under it, should set the energy.

Hard Coatings Laser Cleaning

Stripping a PVD or CVD hard coating from tool steel is a narrow band, since about 2–4 J/cm² removes the coating while 8–12 J/cm² injures the host steel. Bay Area tool remanufacturers should treat a glossy flank face as a screening test only, because recoating contracts need a chemical strip-complete criterion.

Laser Cleaning Anodized Aluminum Without Host Injury

Anodized aluminum on [aluminum](/materials/aluminum-laser-cleaning) clears near 1.5–4 J/cm² while the host is injured near 2–5 J/cm², so the safe setting follows that narrow aluminum × anodized aluminum pair on a labeled coupon.

Pipe Flange Gasket Residue Laser Cleaning

Rubber gasket residue on a [steel](/materials/steel-laser-cleaning) pipe flange lifts at **1–3 J/cm²**, while **8–15 J/cm²** begins to injure the steel itself, so the pass stays at the low end of that gap.

Where brick fireplace cleaning fits among other laser applications