IICRC Certified Mold Remediation
Crawl Space Mold? Dry, Clean and Protect the Space Below
We remove the mold, fix the moisture source, and install vapor barriers or full encapsulation so it does not come back.
Why PNW Crawl Spaces Grow Mold
The Conditions Under Your Home Are Nearly Perfect for Mold
Dirt floors, seasonal rain, poor drainage, and inadequate ventilation combine to push relative humidity above 70% in most unprotected PNW crawl spaces, above the threshold where mold colonizes wood.
Dirt Floors Release Moisture
A bare dirt floor continuously evaporates groundwater, routinely hitting 70–90% humidity in a PNW winter, high enough for Aspergillus, Penicillium, and Cladosporium to colonize wood.
High Rainfall & Poor Drainage
Portland sees 36–44 inches of rain annually; foothill communities see up to 90 inches. Water pooling around the foundation finds its way under the home through block gaps, vents, and the soil itself.
Inadequate Ventilation
PNW vented crawl spaces rarely achieve cross-ventilation in winter when outdoor humidity exceeds interior humidity, moisture has nowhere to go and finds the wood.
Pre-1980 Housing Stock
Most Vancouver and Portland neighborhoods are dominated by pre-1980 homes built without vapor barriers, 40 to 70 years of unprotected moisture exposure under the floor.
Warning Signs
Signs You Have Crawl Space Mold
Musty odor through floor registers
The crawl space shares air with the living area through floor registers, gaps around plumbing penetrations, and the stack effect. A persistent musty smell that gets worse in fall and winter is often the first sign.
Visible dark staining on floor joists
Black, green, or gray fuzzy growth on floor joists or the underside of the subfloor is a visual confirm that mold is present and active.
Recent water intrusion under the home
A burst pipe, a drainage failure, or flooding under the home creates ideal conditions for mold within 24 to 72 hours. See our water damage service if you have had a recent event.
Allergy or respiratory symptoms worse indoors
Mold spores travel into living areas through the floor. If symptoms cluster at home and improve away from home, the source may be below the floor.
Not sure what you are looking at? A free assessment takes under 90 minutes and gives you a clear answer.
Our Process
How We Remove Crawl Space Mold
Every job follows IICRC S520 protocol: identify the moisture source first, set containment, remove the mold, treat the surfaces, and fix the source so it cannot return.
Free Assessment First
We inspect visually and with a moisture meter to find the moisture source before touching any mold. Disturbance without containment releases spores.
Containment & HEPA Air Control
Poly sheeting at the access point. Negative air pressure with a HEPA air scrubber captures disturbed spores. Full PPE (Tyvek, P100 respirators) throughout.
Removal & Antimicrobial Treatment
Contaminated insulation and wood that cannot be cleaned are bagged and removed. Remaining surfaces are HEPA vacuumed then treated with EPA-registered antimicrobial.
Vapor Barrier or Full Encapsulation
Minimum 6-mil polyethylene vapor barrier over dirt floor and up foundation walls. For severe moisture: full encapsulation with sealed liner and conditioned air supply, the PNW gold standard.
Cost & Coverage
What Does Crawl Space Mold Removal Cost?
Typical Cost Range
Crawl space mold remediation in the Portland/Vancouver metro typically runs $1,500 to $5,000 or more. A small, localized patch in a 500 sq ft crawl space is toward the low end; a large, heavily contaminated space requiring full encapsulation is toward the high end.
What Drives the Price
Linear footage of affected joists, cubic footage of material removed, encapsulation liner square footage, and labor hours in a low-clearance space all factor in. Low-clearance crawl spaces take more time. The only accurate estimate comes from seeing the space, our assessment is free.
Insurance Coverage
If the mold resulted from a covered water event, a burst pipe, for example, homeowners insurance often covers remediation. Gradual moisture from a dirt floor or poor drainage is typically excluded as a maintenance issue.
Why RescueHero
Disaster Is Stressful Enough
We take the weight off your shoulders, fast response, real expertise, and an insurance process we handle for you.
Fast 24/7 Response
We answer day or night and arrive on-site in 90 minutes or less, because water damage spreads by the hour.
We Handle Your Insurance
We document the loss and bill your insurance company directly, so you can focus on your family.
IICRC-Certified Crews
Trained, certified technicians using industrial drying, thermal imaging and proven methods to restore your home.
Local Experts Since 2003
Two decades restoring Portland-metro homes and businesses, ranked in the top 4% of Washington contractors.
How It Works
Three Steps to Your Home Restored
A clear, calm process from your first call through the final repair.
Call & Rapid Response
Call (360) 300-4111 any time. We dispatch a crew and arrive on-site in 90 minutes or less to assess the damage and stop it from spreading.
Mitigate & Dry
We stop the source, extract water, and set up industrial drying to prevent mold and further loss, documenting everything for your claim.
Restore & Rebuild
From repairs to full reconstruction, we return your home to pre-loss condition and handle your insurance claim from start to finish.
Licensed, Bonded & Insured
Fully licensed in Oregon & Washington (WA #PALIYCL840CR · OR CCB #178996), with full insurance for your peace of mind.
IICRC Certified
Our technicians are trained and certified to IICRC industry standards for water, fire and mold restoration.
Workmanship You Can Trust
We don’t leave until it’s done right, restored to pre-loss condition or better.
Insurance Claims Made Easy
We Work Directly With Your Insurance
If crawl space mold resulted from a sudden, accidental water event, a burst pipe or appliance failure, your homeowners policy often covers remediation alongside the water damage claim. Gradual moisture from a dirt floor or poor drainage is typically classified as a maintenance issue and excluded. We assess the cause during the free inspection and work directly with your adjuster when a covered cause is identified.
- Billed directly to your insurance carrier
- Full photo & moisture documentation
- We advocate for a fair, complete claim
- You choose your contractor, not the insurer
Built on Trust
Two Decades of 5-Star Craftsmanship
RescueHero is the restoration arm of the Paliy family’s construction company, rated 5.0 on HomeAdvisor and ranked in the top 4% of Washington contractors by BuildZoom. The same proven team and standards, now restoring homes and businesses after disaster.
“The work was done efficiently and professionally, with very good communication.”
“Great work! Fast, clean, customer friendly!”
“Art and David were extremely professional and answered all my questions while installing our new floors.”
Verified reviews of the Paliy family’s construction & remodeling work (BuildZoom). Restoration reviews coming as RescueHero launches.
Questions & Answers
Crawl Space Mold Removal: Frequently Asked Questions
How do I know if I have mold in my crawl space?
How do you remove mold from a crawl space?
Does homeowners insurance cover crawl space mold?
How much does crawl space mold removal cost?
Where We Work
Serving the Portland & Vancouver Metro
Fast, local response across the entire Portland/Vancouver metro. Our crews are based right here, so when you call, help is already on the way.
View All Service Areas
Mold Under Your Home Is Not a Wait-and-See Problem.
Call us today and we will have a technician on-site within 90 minutes to assess the situation at no charge.
Get Help Now
Tell Us What Happened
Tell us what happened and we’ll call you right back. For an active emergency, please call or text (360) 300-4111, we answer 24/7.