When smoke clears and the sirens fade, the real work begins—safely. This guide walks property owners and facility managers through fire cleanup safety protocols, with a practical focus on containment, PPE, and negative air. If you’re facing fire damage in the Carolinas, TSIAC International can help you execute these steps correctly and efficiently.
Why safety-first matters after a fire
Fire scenes are complex. Soot particulates are acidic and ultra-fine; water used to extinguish flames can drive contaminants into hidden cavities; and burned building materials may release toxic compounds. Disturb them without a plan and you spread contamination, create inhalation hazards, and risk secondary damage to the rest of the building. Three pillars keep your team and occupants safe while preventing cross-contamination:
- Containment (isolate and seal the work area)
- PPE (protect workers from inhalation, contact, and penetration hazards)
- Negative air (pull contaminated air out through HEPA filtration and maintain pressure control)
Below is a field-tested, step-by-step approach.
1) Containment: keep contaminants where they are
Goal: prevent smoke residue, soot, and debris from migrating into clean areas.
A. Define the work zone
- Walk the site and mark the primary fire-impacted spaces and any adjacent rooms with visible soot or odor.
- Identify routes for material removal and a separate path for clean entries/exits where possible.
B. Seal the envelope
- Install 6-mil poly sheeting from floor to ceiling to enclose the work zone.
- Tape and seal penetrations (HVAC registers, light fixtures, chases, cracks around doors).
- Add zipper doors or framed doorways with overlapping flaps for controlled access.
- Protect floors with ram board or poly + slip-resistant mats.
C. Protect building systems
- HVAC off in the work area. Seal supply and return vents to prevent system contamination.
- If the rest of the building requires climate control, isolate that air handler from the work zone.
D. Establish clean/dirty transitions
- Create a decon vestibule (often a two- or three-chamber setup) immediately outside the contained space:
- Chamber 1: dirty side (bag-out area for debris and disposable PPE)
- Chamber 2: intermediate (hand/face cleaning station, tool wipe-down)
- Chamber 3: clean side (PPE donning)
Pro tip: Label everything—“HOT ZONE,” “DECON,” “CLEAN”—so subs and vendors don’t inadvertently breach the barrier.
2) PPE: protect the people doing the work
Goal: prevent inhalation of fine particulates and contact with irritants/carcinogens found in post-fire residues.
A. Respiratory protection
- Minimum: NIOSH-approved half-face respirator with P100 filters for soot particulates.
- When to upgrade: If strong odors/volatile compounds are present, use combination P100/OV cartridges (particulate + organic vapor).
- Fit testing: Ensure each worker is fit-tested and medically cleared. Facial hair compromises the seal.
- Change-out schedule: Replace filters based on load, odor breakthrough, or manufacturer guidance.
B. Body, hand, eye, and foot protection
- Coveralls: Disposable, hooded coveralls (e.g., Type 5/6) to prevent tracking soot to clean areas.
- Gloves: Nitrile (chemical splash) or cut-resistant gloves depending on task and debris. Double-glove when bagging waste.
- Eye/face: Safety glasses with side shields for general work; face shields for scraping/wiping overhead.
- Footwear: Safety-toe boots with slip-resistant soles; use disposable boot covers inside contained zones to reduce cross-tracking.
C. Donning and doffing (the right way)
- Donning (clean side): sanitize hands → base layer → coveralls → respirator → eye protection → gloves → boot covers.
- Doffing (dirty side): remove gross debris first → wipe down gloves → peel off coveralls inside-out → bag immediately → remove boot covers → clean gloves → remove eye protection → remove respirator last → sanitize hands and face.
Pro tip: Train your crew to treat PPE like a system. Most exposures happen during doffing and breaks.
3) Negative air: control the direction air (and contaminants) move
Goal: keep the work area under negative pressure so air flows into the containment and out through a HEPA-filtered exhaust—never the other way around.
A. Equipment and setup
- Negative Air Machine (NAM): Portable unit with a HEPA H13 or better filter.
- Ducting: Run layflat duct from the NAM to an exterior discharge point (window/door panel). Seal all joints with tape/clamps.
- Make-up air: Ensure enough make-up air pathways into containment (through controlled zipper doors or make-up vents) so the NAM doesn’t collapse your sheeting.
B. Pressure targets and verification
- Aim for a consistent, measurable negative pressure relative to adjacent spaces (commonly verified with a differential manometer).
- Use a smoke pencil at door seams to confirm air is moving into the work zone.
- Log readings at the start, mid-shift, and end of day—or set up a continuous monitor if available.
C. Air changes and filtration
- Size your NAM to provide adequate air changes per hour (ACH) for the volume of the containment. Higher ACH improves capture of fine particulates and odors.
- Maintain and inspect pre-filters daily; replace clogged pre-filters to protect the HEPA and maintain airflow.
Pro tip: Position the NAM intake opposite your decon/entry to create a sweeping airflow path across the workspace.
4) Cleaning sequence: from dry removal to fine particulates
Goal: remove residues efficiently while minimizing re-aerosolization.
- Dry removal first: HEPA vacuum ceilings, walls, and surfaces before wet cleaning. This reduces smear and prevents grinding soot into pores.
- Wet wipe/wash: Use fire-specific detergents/degreasers following label directions. Rinse with clean water.
- Porous vs. non-porous: Non-porous surfaces clean more completely; evaluate porous items (acoustic tiles, insulation, charred drywall) for disposal.
- Odor mitigation: After source removal and cleaning, deploy odor control (hydroxyl or ozone—ozone only in unoccupied spaces with strict safety controls).
- Final HEPA pass: Repeat HEPA vacuuming after surfaces are fully dry to capture fine particulates that settled during cleaning.
5) Waste handling and bag-out
Goal: move debris out without contaminating clean areas.
- Double-bag debris in 6-mil poly; goose-neck and tape.
- Use the dirty side of the decon to stage and seal bags.
- Transport along the pre-planned route; never through public or finished areas if you can avoid it.
- Document disposal according to local requirements—especially for appliances, paints, or chemicals affected by heat.
6) Special hazards: when to stop and escalate
Some materials demand specialized handling. Pause and consult professionals if you encounter:
- Compromised structures (unsafe framing, falling hazards)
- Suspected asbestos (textured ceilings, floor tiles/mastic, pipe insulation in older buildings)
- Lead-based paint (pre-1978 homes)
- Heavy chemical/solvent odors or unknown containers that heated in the fire
TSIAC International’s teams are experienced in demolition, abatement, and fire cleanups—so if your project crosses into these categories, bring in a licensed crew to stay compliant and safe.
7) Post-clean verification: don’t skip the proof
Goal: confirm that contamination is contained, air is safe to breathe, and surfaces are clean.
- Visual inspection: no visible soot, streaking, or residue—especially at edges and high points.
- Olfactory check: lingering smoke odor often means remaining source material—re-inspect cavities, carpet pads, and insulation.
- Air and surface sampling (as needed): particulate or odor markers can validate remediation in sensitive settings (medical, childcare, food).
- Pressure off, barriers down (in order): after passing checks, shut down the NAM, remove barriers methodically, and clean the transition zones.
Quick checklist (pin this in your trailer)
- ☐ Build, seal, and label containment with clean/dirty/decon zones
- ☐ Shut down/seal HVAC in the work area
- ☐ Don appropriate PPE (fit-tested respirators, coveralls, gloves, eye/foot protection)
- ☐ Start negative air and verify pressure direction with a meter or smoke pencil
- ☐ HEPA vacuum → wet clean → rinse → HEPA vacuum again
- ☐ Double-bag and bag-out through decon; document disposal
- ☐ Verify results; demobilize barriers in sequence
Need help? Bring in a coordinated crew.
Fire cleanup is not a single trade—it’s coordination between safety, demolition, and restoration. TSIAC International brings those disciplines together so you get a contained jobsite, protected workers, and a clean, ready-to-rebuild space.
One helpful resource: To learn more about respirator selection and use, see OSHA – Respiratory Protection.
If you’d like us to build the containment, run negative air, and handle the cleanup end-to-end, reach out to TSIAC International for a site assessment and plan tailored to your building and timeline.
