Fire damage restoration is the process of removing soot, smoke residue, and fire-suppression water from a structure, then repairing or replacing the materials the fire degraded. Every hour a structure sits with active soot and moisture, the cost of restoring it increases — soot turns acidic on contact with humidity, and the water used to extinguish the fire begins supporting mold growth within 24–48 hours.
A house fire produces three distinct categories of damage, and each requires a different restoration method. Understanding which categories apply to your property determines the scope of work, the equipment used, and the timeline for repair.
Charring, warping, and structural weakening of framing, drywall, and flooring directly exposed to fire. This material is typically removed and rebuilt rather than cleaned.
Airborne particulate that settles on surfaces well beyond the burn area, including closets, ductwork, and adjoining rooms. Soot is acidic and corrodes metal and finishes if left untreated.
Water and chemical retardant used to extinguish the fire saturates floors, subfloors, and wall cavities, creating a secondary water-damage event that runs alongside the fire damage.
Why this matters for your claim: insurance adjusters scope fire damage restoration as a combination of structural repair, contents cleaning, smoke remediation, and water mitigation. A restoration company that only handles one of these categories will leave gaps that surface later as odor, staining, or mold.
Restoration technicians classify smoke residue into four types before choosing a cleaning agent. Using the wrong method on the wrong residue type smears it deeper into the surface instead of lifting it out.
| Residue Type | Source | Surface Behavior | Cleaning Approach |
|---|---|---|---|
| Dry Smoke | Fast-burning fires (wood, paper) at high heat | Powdery, low-smear residue that sits on the surface | Dry sponge or vacuum first, then targeted wet cleaning |
| Wet Smoke | Slow, smoldering fires (rubber, plastic) at low heat | Sticky, smeared residue with strong odor | Solvent-based cleaning; surface often needs degreasing before rinse |
| Protein Smoke | Kitchen fires involving food, grease | Near-invisible residue that discolors paint and varnish | Enzyme-based cleaners; surfaces frequently require repainting |
| Fuel Oil Soot | Furnace or oil-heater malfunction | Fine black film distributed through ductwork | Full HVAC cleaning combined with surface treatment |
Why protein smoke is the most overlooked: it leaves little visible residue immediately after a kitchen fire, so homeowners often skip professional cleaning — then notice yellowing on walls and cabinets weeks later once the residue oxidizes.
Not every fire requires full restoration. The signs below indicate when residue has penetrated past what surface cleaning can remove.
Smoke odor that remains after 48 hours of ventilation has bonded to porous materials like drywall, insulation, or fabric.
Yellow or gray film on surfaces in rooms not touched by flame indicates soot traveled through the HVAC system.
This points to fire-suppression water sitting under finished flooring, which left untreated leads to subfloor rot.
Soot’s acidity attacks metal within hours, which is why appliances and wiring often fail weeks after a fire that appeared minor.
Indicates suppression water has been sitting long enough to start mold growth underneath the smoke damage.
Soot trapped in ductwork recirculates every time the system runs, and surface cleaning the rooms won’t resolve it.
Restoration decisions are made material by material, not room by room. A wall might have drywall that’s replaced, framing that’s cleaned and sealed, and trim that’s repainted — all in the same square foot.
| Material | Typical Damage | Restore or Replace |
|---|---|---|
| Drywall | Absorbs odor and soot deeply; chars near the source | Replace within 6–10 ft of the burn origin; clean and seal beyond that |
| Wood framing & studs | Surface charring, structural weakening if heat exposure was sustained | Sand and seal if structurally sound; replace if charred more than ¼ inch deep |
| Carpet & padding | Soot embeds in fibers; padding absorbs suppression water | Padding is almost always replaced; carpet is cleaned only if soot is surface-level |
| Hardwood flooring | Soot staining, cupping from suppression water | Clean and refinish if cupping is minor; replace boards that have warped |
| HVAC ductwork | Soot circulates through the entire system | Cleaned with negative-air duct vacuums; rarely needs replacement |
| Insulation | Absorbs odor permanently; cannot be deodorized | Always replaced in the affected cavity |
| Metal fixtures & electronics | Soot corrosion sets in within hours | Cleaned immediately if caught early; replaced if corrosion has started |
| Fabric, upholstery, clothing | Odor bonds to fibers; soot can be abrasive | Ultrasonic cleaning or ozone treatment for textiles; some items are unsalvageable |
The sequence below follows IICRC S700 guidelines for fire and smoke restoration. Skipping a step — most commonly odor sealing — is the main reason smoke smell returns after a DIY cleanup.
We document the extent of heat, soot, and water damage room by room, including hidden damage inside wall cavities and ductwork, and prepare the scope for your insurance adjuster. This is also when we identify which smoke residue type is present, since that decision drives every step after it.
Broken windows, compromised roofing, and exposed entry points are secured the same day to stop weather intrusion and prevent unauthorized access to the property.
If fire-suppression water is present, we run emergency water removal before soot cleaning starts — cleaning soot on a wet surface spreads staining instead of removing it.
Salvageable furniture, electronics, and personal items are inventoried, photographed, and moved off-site for cleaning. This protects items from continued exposure to acidic soot while structural work is underway.
Surfaces are cleaned using dry sponges, wet cleaning agents, or media blasting depending on the residue type identified during inspection (dry, wet, protein, or fuel oil soot each respond to a different method).
Ductwork is cleaned with negative-air vacuum equipment so soot doesn’t recirculate through the building once the system is turned back on.
Hydroxyl generators, thermal fogging, or ozone treatment (used only in unoccupied structures) neutralize odor molecules bonded to porous materials rather than masking them.
Drywall, flooring, framing, and insulation removed during mitigation are rebuilt to match the original structure, closing out the claim with a final walkthrough.
Soot etches into surfaces and suppression water spreads as it sits. Call before either sets in permanently.
Two fires that look similar from the outside can have very different restoration costs depending on the variables below. We give you a written scope after inspection rather than a phone estimate, because these factors can’t be assessed without seeing the structure.
A single-room kitchen fire with contained smoke spread restores in 1–2 weeks. A whole-structure fire with HVAC contamination and reconstruction can run 6–12 weeks.
Protein and wet smoke residue require more labor-intensive cleaning than dry smoke, which increases both time and cost per square foot.
Adding water mitigation to a fire job typically adds 3–5 days for drying before reconstruction can begin, since framing and subfloor moisture must reach acceptable levels first.
Jobs requiring framing replacement or permitted reconstruction take longer than jobs limited to cleaning, deodorizing, and repainting.
On pricing: we don’t publish flat rates because fire restoration is priced per job based on Xactimate line items — square footage affected, residue type, and reconstruction scope all factor in. Your written estimate comes after the on-site inspection, and in most cases that estimate goes directly to your insurance adjuster rather than to you out of pocket.
Most homeowner’s and commercial policies cover fire damage restoration, but the claim moves faster when documentation is built correctly from the first visit. Here’s the sequence we follow.
Report the fire to your insurance company as soon as possible, ideally before or immediately after our inspection, so the claim number can be attached to our documentation.
Photos, moisture readings, and a room-by-room scope are recorded in a format adjusters can use directly, reducing back-and-forth requests for more evidence.
We can meet your adjuster on-site or submit the scope remotely, and we adjust line items collaboratively if their assessment differs from ours.
In most cases, we bill your carrier directly for the approved scope, so you’re only responsible for your deductible.
A note on additional living expenses (ALE): if your property is uninhabitable during restoration, most homeowner’s policies include ALE coverage for temporary housing. Ask your adjuster about this when you file — it’s commonly underused simply because policyholders don’t know to ask.
The restoration method changes depending on what burned and what the building is used for. We scope each property type differently.
Kitchen fires, electrical fires, and chimney fires are the three most common residential calls in Duluth. We work directly with your homeowner’s insurance to scope repairs.
We coordinate restoration around tenant displacement timelines and provide documentation landlords need for insurance claims and habitability reporting.
Restaurants, offices, and retail spaces require faster turnaround to limit lost revenue. We sequence work to reopen partial spaces before the full restoration is complete where it’s safe to do so.
We provide Xactimate-compatible scopes, moisture and soot documentation, and direct billing to streamline claim approval.
The cause of the fire affects the residue type and the restoration approach as much as the size of the fire does.
Grease and cooking-related fires produce protein smoke, which causes discoloration that often isn’t visible until weeks later.
Wiring and outlet fires often stay contained to wall cavities but introduce burnt-plastic odor that spreads through HVAC quickly.
Common in Duluth winters; these produce fuel oil or wood-smoke soot that concentrates in ductwork and attic spaces.
Even without direct flame contact, regional wildfire smoke can settle into a home’s HVAC and soft materials, requiring deodorization without structural repair.
Surface cleaning removes visible soot but doesn’t address the chemical and moisture issues underneath. Here’s where the two approaches actually diverge.
Most fire restoration jobs in Duluth involve at least one secondary issue. These are the ones we see most often alongside fire damage.
Sprinkler systems and fire hoses introduce large volumes of water that need extraction within hours. See our emergency water removal page for how we handle this in tandem with fire cleanup.
If suppression water sits for more than 48 hours, mold colonization typically begins. Our mold removal service addresses this when it’s caught during fire restoration.
Structural repair, soot remediation, and water mitigation are handled by the same crew, removing the coordination gap that causes missed damage.
Every job includes moisture readings, photo documentation, and an Xactimate-ready scope so your claim isn’t held up by missing evidence.
Based in Duluth, our average dispatch time across the metro area is under 45 minutes, which matters most in the first hours after a fire.
Our team is trained to the IICRC S700 Fire and Smoke Restoration standard, not general cleaning protocols.
We dispatch fire restoration crews throughout Duluth and the surrounding St. Louis County communities.
Every hour soot and suppression water sit untreated adds to the restoration cost. Call now for a same-day assessment.