Free visual inspection and a written scope of work before any mitigation begins - photos, moisture readings, and drying logs go in your claim file
The scope we write is the scope we bill. Anything new gets shown to you, in writing, before we touch it.
Before
After
Before
After
Before
AfterFast, Reliable Mold Remediation Across Fontana
A typical mold remediation job in Fontana runs $1,800 to $6,500 depending on how far the growth has spread and whether wall cavities, slab edges, or attic spaces are involved. Most jobs we handle here are done in two to four days once containment is set. If you’re seeing black staining on a wall, catching a musty smell in the garage, or dealing with a leak that sat too long, call us at (940) 466-4354 and a real person picks up, day or night.
We work all over Fontana, from the newer subdivisions off Duncan Canyon Road down to the older slab homes near Jurupa and the neighborhoods along Sierra Avenue. Fontana’s inland position against the San Bernardino foothills creates a mold pattern we don’t see in coastal cities: the same Santa Ana winds that dry out surface moisture also push fine dust and spores into west-facing wall cavities and garages. That means a wall can feel bone dry while hidden moisture from a slab leak or supply-line weep keeps feeding growth inside the assembly. We know where to look here, because we’ve opened enough Fontana walls to know the pattern.
Why Wendell Water Damage Restoration Is Fontana’s Preferred Mold Remediation Company
We answer the phone. Not a voicemail, not a callback queue, not an offshore call center. When a Fontana homeowner calls at 10 p.m. about a water heater that let go into a bedroom closet, they get a live person who can schedule a crew and tell them what to do in the next thirty minutes. That matters when mold starts colonizing in the first 24 to 48 hours after a water event.
Our technicians are background-checked and show up in uniform with a live arrival time you can track, not a four-hour window. Before any equipment comes off the truck, you get a written price. Blake Sorensen set that standard from day one, and it’s the same standard on every Fontana job: the number you see on the estimate is the number you pay. We also send before-and-after photos by text, so you’re not standing in a corridor wondering what’s happening behind the containment plastic.
Every job is backed by our 365-Day Done Right Promise. If the mold comes back or the repair doesn’t hold, we make it right, in writing, at no charge. That’s not a marketing line. It’s printed on every scope of work we hand to a Fontana customer before demolition starts.
Mold Removal Service in Fontana
Mold Removal Service in Fontana means physically removing contaminated material, not just spraying something over it and hoping it dies. Most of the time that involves cutting out affected drywall, pulling up saturated flooring or baseboard, and disposing of it under containment so spores don’t spread through the rest of your house. We set up HEPA-filtered negative air pressure before any demolition starts, because containment failure is how a small bathroom problem becomes a whole-house problem.
Containment and Controlled Demolition
For most Fontana jobs, we build a sealed containment area with 6-mil poly and HEPA-filtered air scrubbers running the whole time. Then we remove the affected material, bag it inside the contained zone, and carry it out through the shortest exit. Your hallway stays clean. Your living room stays clean.
Post-Removal Antimicrobial Treatment
After the affected materials are gone, we treat the framing and slab with an EPA-registered antimicrobial. This isn’t bleach and it isn’t a fog-and-run. It’s applied to the surfaces that were wet, after they’ve been dried to the moisture standard set by the IICRC S520 protocol. Then we document the drying with moisture logs and air samples if the scope calls for clearance testing.
Mold Remediation Services in Fontana
Mold Remediation Services in Fontana go beyond removal to find out why the mold grew in the first place, and that’s where local experience saves homeowners money. A wall that looks dry on the surface can be holding Category 2 or Category 3 moisture inside the cavity. In Fontana’s hot, dry climate, surfaces flash-dry fast, which means an inexperienced crew stops the dehumidifiers too early and hands you back a house that still has mold food behind the paint.
Moisture Mapping and Source Identification
We use non-invasive moisture meters and thermal imaging to map where water is trapped, not just where it’s visible. On slab-on-grade homes, which are common across Fontana, that often means checking under vinyl plank or tile at the wall base where the slab has been wicking moisture from a plumbing leak. We check the wall cavity itself, because that’s where we regularly find mold growth two feet above the visible stain.
Category Water and Mold Thresholds
Water damage is categorized by contamination level. Category 1 is clean water from a supply line. Category 2 has significant contamination, like a dishwasher discharge or a sump overflow. Category 3 is grossly contaminated, like sewage. Fontana homes get all three, but the mold risk spikes with Category 2 and 3 water because you’re not just dealing with moisture, you’re dealing with organic material that feeds growth immediately. We explain the category to you in plain language, because it changes the scope and the cost.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Fontana
Our Fontana crews run professional-grade drying and air-scrubbing equipment from Phoenix, XPOWER, and Injectidry. These are the same brands used on large commercial loss sites, not rental-counter gear. We keep spare air movers, dehumidifiers, and HEPA units staged for Fontana dispatch, so we don’t have to wait on equipment when you have a wall cavity that won’t dry. The Injectidry wall-cavity drying system matters especially here, because it lets us dry the inside of a wall without ripping off every square foot of drywall first, which is a real cost difference on a slab home where the cavity holds moisture against the framing.
Common Mold Remediation Problems We See in Fontana Homes
- West-facing wall cavity growth from Santa Ana wind-driven dust. Fine foothill dust and spores get pulled into attics and wall voids during wind events, then settle where they can feed on hidden condensation. We’ve opened west walls in Fontana and found mold three studs back from the visible stain.
- Slab-on-grade moisture trapped under flooring. Many Fontana homes built from the 1960s through the 1990s are slab construction. When a supply line or slab edge wicks moisture, it travels under the flooring and feeds growth at the baseboard long before it ever shows on the surface.
- Surface-dry walls that are still wet inside. Fontana’s inland heat dries the painted surface in a day or two. That creates a false sense of resolution. The moisture inside the wall cavity keeps feeding mold, and the homeowner sees it return six weeks later.
- Garage-side growth from slow plumbing leaks and poor ventilation. Garages in Fontana get hot, and if there’s a laundry sink, water heater, or hose bib sharing that wall, a slow drip plus stagnant air is a recipe for hidden growth. We see this regularly in the Southridge and Northgate areas where garages are attached and poorly vented.
Pricing for Mold Remediation in Fontana, CA
Here are actual ranges for Fontana jobs, not generic national averages. A small bathroom mold job with containment and surface treatment typically runs $1,800 to $3,200. A single-room remediation with controlled demolition, drying, and antimicrobial treatment runs $3,000 to $6,500. Crawl space work involving insulation removal and foundation-side treatment usually lands between $2,500 and $4,800. If you need post-remediation clearance testing from a third-party hygienist, budget another $350 to $700. What moves the number is square footage of affected material, whether wall cavities are involved, and whether slab moisture needs correction before we can close out. We give you the written price before any work starts, and estimates are free. Call (940) 466-4354 for a specific quote on your home.
We Also Serve Cities Near Fontana
Our crews cover Fontana and the surrounding communities, including Bloomington, Rialto, Guasti, and Mira Loma. If you’re just over the Fontana line in Rialto or out near the Guasti area, the same crew and the same written pricing apply. See our full Mold Remediation service area page for more details on what we do across the Inland Empire.
Serving Fontana, CA - Our Local Coverage Area
We’re based in the Fontana area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Mold Remediation in Fontana
No. Fontana’s dry heat actually makes hidden mold risk higher in one specific way: surfaces dry fast, so homeowners stop worrying while the wall cavity or slab underneath is still wet. We’ve seen Category 2 leaks behind Fontana kitchen walls that looked dry on the painted surface but tested wet inside the framing three weeks after the event. The climate keeps the outside of your walls dry, but mold grows in the dark, cool void inside the wall, not on the sunny exterior. If you had a leak of any size, call (940) 466-4354 and we’ll tell you honestly whether you need equipment or just a documentable check.
Because cleaning the surface doesn’t remove the moisture source or the affected material behind the paint. In Fontana homes, that recurring wall mold usually traces back to one of three things: a slow slab leak wicking up through the baseplate, a supply line weep inside the wall cavity, or wind-driven dust that settled in the cavity and found condensation. Until you open the wall, find the water, and remove the contaminated gypsum, it returns. That’s why our Mold Remediation process starts with moisture mapping, not spray.
We treat those as cavity jobs, not surface jobs. On a garage-side wall, we check for plumbing penetrations, water heater condensation, and hose bib leaks behind the drywall. On a west-facing wall, we test the cavity for settled dust and condensation from the daily thermal swing. Then we open the affected section under containment, dry the framing to IICRC standards, and treat before closing. We also text you photo documentation of what we found, so you’re not taking our word for it.
The water category tells us how fast mold will grow and how aggressive the remediation scope needs to be. Category 1 water from a clean supply line gives you a little more time. Category 2 water, like a washing machine discharge, carries organic material that feeds growth within 24 to 48 hours. Category 3 water, like sewage, requires full PPE, full containment, and more demolition. Fontana homes with slab plumbing see a lot of Category 2 surprises, because a slow leak under the slab picks up soil contamination before it surfaces. We explain this in your written scope before any work begins.
Yes. A live person answers every call at (940) 466-4354, 24/7, and we dispatch Fontana crews same-day for mold concerns in most parts of the city, including Southridge, Northgate, Sierra Lakes, and the older neighborhoods along Foothill Boulevard. You’ll get a live arrival time, a uniformed technician, and a written price before any work starts. That’s the standard on every job we run in Fontana, no exceptions.
Written by Blake Sorensen, Owner at Wendell Water Damage Restoration, serving Fontana and the Inland Empire. Founded in 2006. Part of the Relay Home Co. family.