How Our Dry Fog Process Actually Works
Most mold companies tear out your walls. We don't — and the reason comes down to one number: 5–7 microns. Here's the plain-English breakdown of what a true dry fog is, why it's different from what you can buy off the shelf, and exactly how our two-step process destroys mold without touching a single wall.
Why "Dry" Is the Whole Game
The difference between our fog and what you can buy off the shelf isn't the chemical — it's the droplet size. And that difference is why we can treat your whole house without tearing it apart.
5–7 Micron Particles
Anything under 10 microns is a true dry fog. Our patented process produces 5–7 micron droplets — small enough to behave like a gas, large enough to carry the active ingredient.
Behaves Like a Gas
Because the particles are so small, they don't fall and wet surfaces — they drift, bounce, and permeate every wall cavity, duct, and hidden nook the way a gas would.
Zero Wet Residue
Wet fog (50–60 microns) soaks surfaces and feeds mold. Our dry fog leaves no moisture behind, so it never creates the conditions mold needs to return.
The 10-Micron Line: Dry vs. Wet
Under 10 microns = dry fog. The droplets are so small they stay suspended and behave like a gas — permeating every cavity without wetting surfaces. Over 10 microns = wet fog. The droplets are heavy, they fall, they soak surfaces, and that moisture feeds the mold you're trying to kill. Our patented 5–7 micron process lives firmly on the dry side of that line.
Mold Cleanse + Mold Shield
Two products, two jobs. Step One kills what's there. Step Two makes sure it doesn't come back.
Mold Cleanse
Hospital-Grade Sterilant
Our Step One active ingredient is a hospital-grade sterilant we call Mold Cleanse. It's what denatures the mold — breaking down the spore structure so it can no longer grow, reproduce, or survive. This is the kill step.
- Hospital-grade sterilant formulation
- Denatures and destroys mold spores on contact
- Reaches every surface, cavity, and duct the fog touches
- EPA-registered virucidal chemistry
Mold Shield
Antimicrobial Protective Coating
Our Step Two is Mold Shield — an antimicrobial protective coating applied to every surface the fog reaches. It creates a residual barrier that prevents mold from coming back and kills pathogens, viruses, and bacteria on contact. This is the protect step.
- Antimicrobial surface coating on all treated surfaces
- Prevents mold regrowth long after we leave
- Kills pathogens, viruses & bacteria on contact
- The foundation of our 12-Month Free Re-Treatment Warranty
From Inspection to Re-Entry
Six clear stages. No demolition. No multi-week displacement. Just verified, whole-structure mold elimination.
Free No-Obligation Visual Inspection
A certified Mold Assassin assesses your entire property — every room, the HVAC mechanical box, supply and return ducts, attic, and crawlspace — to identify visible mold, moisture sources, and the conditions feeding the problem. No cost, no pressure.
- Whole-property visual assessment
- Moisture & humidity mapping
- HVAC, attic & crawlspace checked
- No obligation, no high-pressure sales
Pre-Treatment Air Sampling (Optional)
If you want lab-verified proof of what's in your air, we collect spore-trap samples and send them to an independent AIHA-accredited microbiology lab. This baseline gives us a documented spore count to measure our results against.
- Environmental Express Bio Pump IAQ 15 sampling
- AIHA-accredited independent lab analysis
- Documented pre-treatment spore baseline
- 25% OFF when scheduled online
Whole-Structure Dry-Fog Infusion
This is the core. Our patented 5–7 micron dry fog is introduced through the HVAC system so it travels every supply and return duct, then fills every room, wall cavity, and hidden nook. Mold Cleanse denatures the spores on contact — everywhere airborne spores have settled, not just where you can see mold. No walls torn out. No demolition.
- 5–7 micron patented dry fog (true dry, under 10 microns)
- Starts at the HVAC mechanical box, travels every duct
- Fills every room, wall cavity & hidden nook
- Mold Cleanse denatures spores on contact
Mold Shield Protective Coating
Once the Mold Cleanse has done its work, the Mold Shield antimicrobial coating settles onto every treated surface. It's the residual barrier that stops mold from coming back and continues killing pathogens, viruses, and bacteria on contact long after we've packed up.
- Antimicrobial coating applied to all surfaces
- Prevents future mold regrowth
- Ongoing pathogen, virus & bacteria control
- Backs our 12-Month Free Re-Treatment Warranty
Post-Treatment Viability Test
We don't just fog and leave. After treatment we take a post-treatment air sample that looks specifically for live, viable mold spores. This is our report card — the goal is to knock the spore count down to zero, or as close to zero as possible, and well within healthy levels compared to the pre-treatment baseline.
- Viable (live) spore testing after treatment
- Measured against the pre-treatment baseline
- Goal: zero live spores in the premises
- Documented proof the treatment worked
Re-Entry & Maintenance Protocol
Once the tech finishes the full treatment and evaluates how well the fog is dwelling, we'll reach out and let you know to wait 1 to 1.5 hours before re-entering. You'll notice a mild vinegar aroma when you walk in — it dissipates through the night. A normal-size home, even a larger one, is done within the day. You'll be having dinner and sleeping in your own bed the same day.
- Re-entry 1 to 1.5 hours after treatment
- Mild vinegar aroma dissipates overnight
- Same-day completion — sleep in your own bed
- Keep indoor humidity ≤ 50% to protect results
You Can't Buy This Machine
The patent isn't just the chemistry — it's the equipment that creates the dry fog. Here's why that matters.
Custom-Built, Not Off-the-Shelf
You can't buy our fogging equipment at a supply house, John Deere, Home Depot, or Lowe's. We build it — and that's where the patent comes in. The equipment is what creates the true dry fog.
Why Off-the-Shelf Fails
Every fogger you can buy at those stores is built for pest control and produces a 50–60 micron droplet — which is extremely wet. That moisture feeds mold. It would never work for mold treatment.
The Patent Is the Particle Size
Our equipment produces a true 5–7 micron dry fog. Anything under 10 microns is dry; anything over is wet. That difference is the entire reason demolition-free mold remediation is possible.
True dry fog. Behaves like a gas, permeates every cavity, leaves zero wet residue. Built in-house — you can't buy it anywhere.
Built for pest control. Extremely wet droplets that soak surfaces and feed mold. Available at any supply house — and useless for mold treatment.
See Our Dry Fog In Action
This is what demolition-free remediation actually looks like. Our hospital-grade dry fog generator fills every cubic foot of air, bouncing off furniture and permeating drywall, baseboards, and HVAC ducts — eliminating hidden mold spores without tearing a single wall down.
Dry Fog Diffusion in Living Area
Our specialized dry fog generator infusing an entire residential living room. The microscopic droplets bounce like gas molecules — enveloping sofas, rugs, lighting fixtures, and air spaces without wetting or staining porous fabrics.
Total Structure Volume Saturation
Full room saturation achieved in minutes. The dense fog permeates interior wall cavities, drywall voids, ceiling junctions, and returns through the HVAC duct system to sterilize the home from floor to roofline.
Dry Gas-Like Microparticles
Droplets measure less than 7 microns — smaller than red blood cells. They bounce off surfaces without wetting them, behaving like gas to permeate porous materials.
HVAC & Duct Sanitization
We circulate the dry fog through the air handler so trunk lines, supply vents, and hidden plenums are completely decontaminated — stopping recurring re-infestation.
Sleep In Your Bed Tonight
No moving into hotels or living in a plastic dust bubble for 3 weeks. Treatment wraps in ~6 hours and leaves zero toxic chemical residues behind.
We Prove It Worked
After treatment we take a post-treatment air sample that looks specifically for live, viable mold spores. This is our report card. The goal is to knock the spore count down to zero — or as close to zero as possible — and well within healthy levels compared to the pre-treatment baseline. If the count lands in the healthy zone and shows a dramatic reduction, the treatment is complete and verified.
Looks for live, growing spores — not just dead dust.
Compared to your pre-treatment lab sample.
You get the results in writing.
Keeping Mold Gone for Good
Mold is always in the air around us — the goal isn't a sterile bubble, it's stopping in-home growth. Here's how to protect the results.
Dry Any Leak Within 24–48 Hours
If a future leak occurs, get it fully dried out within 24 to 48 hours. Lingering moisture is the #1 cause of new mold growth — and the one condition that would void the warranty.
Keep Humidity Below 50%
As indoor humidity climbs north of 50%, moisture can condense on surfaces — creating a food source for the mold spores that are always in the air. Keep it at or below 50% and the Mold Shield coating does the rest.
The 12-Month Warranty: Meet those two conditions and if mold reappears within 12 months of your treatment date, we retreat the entire premises at no cost. In our many years in business, we've never had to go back and retreat.
Common Questions
Is the dry fog safe for my family and pets?
Yes. The chemistry is EPA-registered and leaves zero wet residue. We'll walk you through the re-entry protocol (1–1.5 hours) so the space is comfortable and safe before you come back in.
Why does the house smell like vinegar after treatment?
That mild vinegar aroma is normal and expected — it's a byproduct of the active ingredient working. It dissipates on its own through the night, usually gone by morning.
Will mold come back after the treatment?
Mold is always present in the air around us — the goal isn't a sterile environment, it's stopping in-home propagation and growth. As long as any future leak is dried within 24–48 hours and indoor humidity stays at or below 50%, the Mold Shield coating keeps regrowth from taking hold. If mold does return within 12 months, we retreat free.
How long until I can go back inside?
Typically 1 to 1.5 hours after the tech completes the full treatment. We'll reach out and confirm re-entry once we've evaluated how well the fog is dwelling.
Do I need to leave my home for weeks?
No. A normal-size home — even a larger one — is completed within the day. You'll be having dinner and sleeping in your own bed the same day of treatment.
Credibility / Achievements / Awards
Backed by the nation's most stringent independent environmental inspection and remediation standards.
See the Dry Fog Difference in Person
Schedule your free no-obligation mold inspection and let a certified Mold Assassin show you exactly how this works for your home.