Crawl Space Mold & Mildew Repair
Musty odors inside your home often point to fungal growth in the crawl space, and we solve the problem by treating the mold and installing moisture controls to keep your crawl space dry.
Financing Available
Services for Mold & Mildew in Crawl Spaces
what Causes Mold & Mildew in Crawl Spaces?
Mold and mildew develop whenever moisture lingers in your crawl space. High humidity, groundwater seepage, and plumbing leaks create damp conditions that are perfect for spores. Without a vapor barrier, moisture from the soil evaporates into the air and gets trapped by poor ventilation. This damp environment allows mold to feed on organic materials like wood framing and insulation.
Signs To Look Out For!
Musty or earthy odors inside the home
Musty or earthy odors inside the home
You might notice a damp, dirty smell lingering in your living areas that does not seem to go away with cleaning. This odor typically rises directly from the crawl space due to the stack effect, which pulls air from the bottom of the house to the top. It serves as a strong indicator that mold or mildew colonies are currently active beneath your floorboards. Because a significant portion of the air you breathe comes from down below, this smell confirms that spores are circulating through your home.
Sagging floors
Sagging floors
When you walk across the room, the floor might feel soft, spongy, or unlevel under your feet. This physical change usually happens because persistent moisture has attacked the wooden beams and joists supporting your home structure. As mold feeds on the organic wood fibers, the material weakens, rots, and loses its ability to hold weight. Ignoring this sign can lead to expensive structural repairs as the damage spreads to other areas.
Visible dark spots, fuzzy growth, or discoloration on wood or insulation
Visible dark spots, fuzzy growth, or discoloration on wood or insulation
If you look into the crawl space, you may see discoloration, dark spots, or fuzzy patches on the wood. These are direct visual confirmations that spores have settled and are actively feeding on your subfloor or insulation. While mildew often looks like a surface powder, darker mold growth can penetrate deep into the material. Seeing this means the environment is wet enough to support life and needs immediate correction.
Warped or damp wood joists / supports
Warped or damp wood joists / supports
Structural wood should always be dry and straight, but constant exposure to damp air can cause it to twist or feel wet to the touch. This warping indicates that the humidity levels in your crawl space remain high enough to saturate the timber. Over time, this constant dampness compromises the integrity of your floor system. It signals that your current ventilation or barrier is failing to keep ground moisture out.
Persistent high indoor humidity
Persistent high indoor humidity
When the relative humidity in a crawl space stays above 70%, it creates a tropical environment under your house. You might see condensation dripping off your HVAC ducts or water pipes (sweating). This excess moisture eventually migrates upstairs, making your home feel sticky and forcing your AC to work harder.
Allergy or respiratory symptoms that improve when away from home
Allergy or respiratory symptoms that improve when away from home
Family members might experience sneezing, runny noses, or respiratory irritation that seems to persist while they are inside the house. A key clue is if these symptoms improve or disappear when you leave the home for work or travel. This pattern suggests that mold spores from the crawl space are compromising your indoor air quality. It indicates that the biological growth below is severe enough to impact the health of people living above it.
Condensation on pipes or surfaces
Condensation on pipes or surfaces
Water droplets forming on pipes, ductwork, or hard surfaces in the crawl space are a clear warning sign. This sweating effect occurs when warm, humid air hits cool surfaces, turning water vapor back into liquid water. This continuous supply of liquid water provides the hydration that mold and mildew need to survive and spread. It shows that the humidity level is uncontrolled and actively feeding the problem.
Pest activity (attracted to moisture)
Pest activity (attracted to moisture)
Bugs, rodents, and other pests are naturally drawn to damp, dark environments where they can find water and shelter. If you notice more pests than usual, it often means the conditions in your crawl space have become a comfortable habitat for them. These pests can carry spores and damage vapor barriers, making the moisture problem worse. Their presence is often a secondary symptom of the high moisture levels that attract mold.
Signs of Potential Issues from Mold & Mildew
ready to fix it? LET’S GET STARTED
The Best Solution For The Problem
To control mold and mildew long term, Cantey Foundation Specialists installs materials engineered for moisture control.
CleanSpace® Crawl Space Vapor Barrier
To permanently separate your home from the damp earth, we install the CleanSpace® vapor barrier. Unlike thin plastic sheets that easily tear, this is a heavy-duty, 20-mil poly-reinforced barrier designed specifically for crawl space environments. It is durable enough to crawl on without ripping and contains an antimicrobial additive called UltraFresh that prevents mold from growing on the liner itself.
Once installed, this bright white barrier completely seals off the dirt floor and walls, stopping ground moisture from evaporating into your home. It transforms a dark, dirty hole into a clean, usable storage area while providing a long-term defense against humidity and pests.
Crawl Space Drainage Matting & Systems
Crawl space liners rest directly on the crawl space floor. If your crawl space is flooding, water can be trapped underneath, never making it to your perimeter drain.
The raised dimples on our CleanSpace® Drainage Matting gives the water flooding into your crawl space a channel underneath your crawl space liner. This directs the water flooding your crawl space to your perimeter crawl space drain and sump pump system.
To install drainage matting in your crawl space, trust the professionals at Cantey Foundation Specialists to get the job done right.
Commercial-Grade Energy-Efficient Dehumidifiers
The SaniDry dehumidifier offers giant performance in a small package. It’s the world’s most efficient, high-performance dehumidifier, without a bulky heat exchange core. The Sedona easily fits in small crawl spaces, yet has a powerful blower to effectively dry large crawl spaces. Mold and mildew are common in crawl spaces, but the Sedona keeps the relative humidity below 55%, so mold won’t stand a chance. As a high-efficiency dehumidifier, the Sedona removes more moisture (100 pints per day) for less electricity cost than conventional models.
The SaniDry Sedona dehumidifier drains automatically and has a humidity sensor that monitors the air, so once it’s installed, there’s nothing else to do. Your crawl space will be drier and healthier – and so will the rest of your home too!
Crawl Space Sump Pump Systems
The SmartSump™ Crawl Space Sump Pump is designed to work seamlessly with your CleanSpace® liner system. It sits in the lowest spot of your crawl space to collect and remove water automatically.
This system features a heavy duty cast iron pump and a unique airtight lid. These components ensure water is pumped out of your home without letting moisture evaporate back into the air.
To install a sump pump system in your crawl space, trust the professionals at Cantey Foundation Specialists to get the job done right.
Crawl Space Insulation Solutions
TerraBlock™ insulation is a durable and pliable foam designed to insulate rough or uneven crawl space floors. It features a puncture resistant moisture barrier that protects your liner while creating a cushioned layer to prevent cold from rising through the ground.
SilverGlo™ wall panels use graphite infused foam and a radiant barrier to reflect heat back into your crawl space. Unlike fiberglass that absorbs moisture and falls, these rigid panels stay in place to maximize energy efficiency and keep your floors warm.
Replacing failing fiberglass with these water resistant materials ensures your insulation performs even in damp conditions. This upgrade permanently improves home comfort and reduces energy costs.
mold and crawl space remediation Process
Inspection & Diagnosis
We start by sending a specialist to your home to perform a comprehensive evaluation of the crawl space environment. They will identify the specific sources of moisture, whether it is groundwater seepage, high humidity, or plumbing leaks, and assess the extent of any existing mold growth. This inspection also includes checking the wood framing and structural supports to determine if rot has already compromised the integrity of your floors. By diagnosing the root cause, we can design a custom solution that stops the problem at its source rather than just covering it up.
01
Prep & Cleanup
Before we install any new protection, we must clear out the damaged materials that are holding moisture and mold. Our team removes wet, fallen insulation, clears away debris, and disposes of contaminated vapor barriers that are no longer effective. This step eliminates the organic food sources that mold thrives on and prepares the area for a clean installation. Creating a smooth, debris-free surface is essential for ensuring the new encapsulation system seals properly against the earth.
02
Drainage & Water Control
If standing water is an issue, we address it immediately by installing a robust drainage system designed specifically for crawl spaces. This typically involves laying down drainage matting that allows water to flow underneath the liner rather than getting trapped against it. We may also install a sump pump system to actively collect and eject water away from your home’s foundation during heavy rains. This active water management ensures the space remains dry even when the water table rises.
03
Vapor Barrier and Encapsulation
To permanently separate your home from the damp earth, we install a heavy-duty vapor barrier across the entire floor and up the walls. This thick, durable liner creates a continuous seal that locks ground moisture out and prevents it from evaporating into your home. Unlike thin plastic that tears easily, this encapsulation system is built to last and transforms the crawl space into a clean, usable area. It acts as the primary shield against the earth’s natural humidity.
04
Dehumidifier Installation
Encapsulation stops ground moisture, but to fully control the air quality, we install a commercial-grade dehumidifier. This powerful unit automatically filters the air and maintains humidity levels below the threshold where mold can grow. By keeping the relative humidity low year-round, we ensure that wood structures remain dry and stable. This active drying mechanism is critical for long-term mold prevention and improved indoor air quality.
05
Sealing and Insulation
We finish the system by sealing off vents and air leaks that allow humid outdoor air to enter the crawl space. Our team also installs rigid thermal insulation on the walls to regulate temperature and prevent condensation from forming on cold surfaces. This creates a conditioned space that is similar to the rest of your home, rather than being exposed to the elements. Blocking these external factors maximizes energy efficiency and protects pipes from freezing.
06
Final Check and Customer Walk-through
Once the installation is complete, our foreman performs a rigorous final inspection to verify that every seal is airtight and the system is operating correctly. We then walk you through the completed project, showing you the transformation and explaining how the new equipment works. This is your opportunity to ask any maintenance questions and see firsthand how your home has been protected. We want to ensure you are completely confident in the solution before we leave.
07
Why Choose Cantey to Repair Your Mold & Mildew Problem?
Total Crawl Space Restoration
We handle everything from drainage and rotten wood replacement to final humidity control, ensuring your home is permanently protected from mold return.
Engineered for Lasting Dryness
Our solutions use heavy-duty materials designed to stop mold at its source by eliminating the specific moisture conditions that allow spores to thrive.
Root Cause Diagnostics
Our trained technicians perform detailed inspections to identify hidden moisture sources, ensuring we solve the root problem rather than just treating surface symptoms.
Integrated Moisture Defense
We combine encapsulation, drainage, and commercial-grade dehumidification to create a powerful defense system that yields the best results against recurring mold growth.
Proven Mold Prevention
We use specialized encapsulation solutions designed to prevent repeat issues, backed by a BBB accredited team committed to restoring trust in your home.
Healthy Air Quality
By sealing out mold and dampness, we stop spores from circulating upward, creating a safer and cleaner living environment for your family.
Benefits of Our Mold & Mildew Solutions
Our Customers Say it Best
Ask about our financing options
Cantey Foundation Specialists offers flexible, easy to understand financing options for homeowners. During our in-house visit, your specialist will help you find the financing options that work for YOU!
Fixed
12.99% for 120mos
6 Mos
No Payments
12 Mos
With Min Payments
Can mold be removed without fixing moisture?
Addressing the moisture source is the only way to stop mold permanently. If you simply scrub the mold away without fixing the leak or high humidity, the spores will return quickly. By eliminating the damp conditions that allow spores to thrive, we ensure the mold cannot grow back.
Will encapsulation alone stop mold?
Encapsulation is a powerful step, but it works best when combined with active moisture management. While the liner seals out ground moisture, a commercial-grade dehumidifier is often needed to pull excess humidity from the air. Proper drainage is also essential to move water away from the foundation, ensuring the entire system yields the best results.
How quick does mold grow?
Mold spores are incredibly opportunistic and can begin to grow within just 24 to 48 hours of moisture exposure. This rapid growth cycle is why immediate action is critical when you spot leaks or standing water. Once the environment hits roughly 60% humidity, it provides a breeding ground for these spores to multiply.
Is mold harmful to health?
Yes, mold exposure can aggravate allergies and trigger asthma symptoms for those living in the home. Common reactions include respiratory irritation, sneezing, or congestion that seems to improve when you leave the house. Because air from the crawl space rises into your living areas, these health effects can impact the entire family.
Can I DIY mold remediation?
While DIY cleaning methods might help remove small, visible patches of mold, they rarely solve the underlying issue. Long-term prevention requires professional encapsulation and moisture control systems that are difficult to install without specialized training. Our experienced technicians use heavy-duty materials to ensure the moisture is managed correctly for good.
frequently asked questions about Mold and Mildew in Crawl Spaces
Get a free inspection for your moldy crawl space
Get a clear diagnosis and a permanent solution tailored to your home.
