Acidic soot residue starts corroding unprotected metal within roughly two days in Lanham, MD conditions, which is why classification happens fast, not as a leisurely first step.
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Treating both classes the same way is the most common soot-cleanup mistake.
Using the wrong tool on either class tends to make the residue worse.
Local Lanham dispatch keeps that window from closing before we arrive.
Fine particulate captured rather than recirculated back into the air.

Dry-chemical sponge work lifts embedded particulate without pushing it deeper.
HEPA extraction pulls particulate before any wet cleaning ever touches the fiber.
A completely different chemistry than what porous drywall responds to.
This track gets prioritized first because the corrosion clock doesn't pause for anything else.
Ceilings get worked before walls so falling particulate doesn't recontaminate finished surfaces below.
A property can look clean and still be recirculating particulate through the ducts.
A technician answers and mobilizes the nearest available crew.
No return trip needed once the surface classification is done.
Every surface gets classified and priced before any cleaning starts.
The job isn't finished until every classified surface has been addressed.
"Learning that porous and non-porous surfaces get treated completely differently was new information, but it made sense once explained." — Homeowner, Lanham
"They got to our kitchen faucet fast enough that it never even started pitting, which the adjuster said was lucky timing on our part." — Homeowner, Lanham, MD
"The HEPA extraction step before any wet cleaning turned out to be the reason our carpet actually came clean." — Homeowner, Lanham
The wrong method on either class tends to spread or set the residue worse.
We test each surface individually rather than assuming one method works everywhere.
Roughly two days under typical conditions, which is why we prioritize metal early.
Cleaning reduces odor, but persistent smell sometimes needs a separate treatment.
Yes, as long as HEPA extraction happens before any wet cleaning step.
Our Soot Cleanup crews cover Lanham and the surrounding zip codes, carrying tools for both surface tracks on every truck.
