What's in Fire Extinguisher Powder

Most residential fire extinguishers use monoammonium phosphate, a dry chemical that smothers flames by interrupting the combustion reaction. While effective at putting out fires, this powder is mildly corrosive and leaves a sticky, acidic residue that bonds to surfaces. It also becomes airborne easily, which means even areas far from the fire get coated. Electronics, appliances, and metal fixtures begin corroding within hours if not cleaned.

Why You Should Not Vacuum Fire Extinguisher Powder

The powder is so fine that it passes through standard vacuum filters and damages the motor. If you use a regular household vacuum, you'll spread the residue into the air and coat surfaces you didn't even know were affected. HEPA-filtered vacuums can capture the powder, but only if the filters are changed frequently during cleanup. Most homeowners do not have the right equipment, which is why professional cleanup is recommended.

Immediate Steps After Using a Fire Extinguisher

Open windows and ventilate the space. Wear gloves and a mask to avoid skin contact and inhalation. Do not touch electronics or appliances until they've been inspected. If the powder is on food, utensils, or dishes, throw them away. Do not try to wash powder-covered items in your washing machine or dishwasher. The residue will clog the machines and spread to other items.

Professional Fire Extinguisher Cleanup

We arrive with HEPA vacuums and cleaning solutions designed for chemical residue. First, we HEPA-vacuum all surfaces to remove loose powder. Then we clean walls, ceilings, and contents using specialized degreasers that neutralize the acidic residue. Electronics get opened and cleaned individually to remove powder from internal components. Metal surfaces get treated with corrosion inhibitors. We also clean or replace HVAC filters and inspect ductwork to ensure powder did not spread through the system. Only after every surface is residue-free do we release the space.

Insurance Coverage for Fire Extinguisher Damage

Fire extinguisher cleanup is covered if the fire that required extinguishing was a covered event. We document the initial fire damage, photograph residue, and provide a scope that includes both fire and extinguisher cleanup costs. Our team works with your adjuster to ensure the claim covers all necessary restoration.

If you used a fire extinguisher and residue is covering your home, call for professional cleanup. We'll remove the powder, protect your belongings, and handle your insurance claim.