Crawl Space Ninja Show
Welcome to the Crawl Space Ninja Show with Michael Church, where we break down the real fixes that make your home healthier. Each episode covers practical, proven ways to improve indoor air quality by addressing the attic, basement, and crawl space — the hidden areas that control how your whole home feels and functions.
The Pest Problem Living Under Your Vapor Barrier Right Now
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Are your vapor barriers actually protecting your home? Learn why standard 6-mil plastic fails to stop pests and moisture.
Building codes for these materials were written decades ago and have not kept up with modern building science. Contractors rarely warn homeowners about the durability issues of thin plastic, which rodents can tear through like tissue paper. This leaves your foundation vulnerable to infestations and long-term structural issues.
We show you exactly why relying on outdated minimums leads to ongoing crawl space moisture problems. Understanding these common installation flaws is...
Building Code Says 6 Mil Is Fine. That Doesn't Mean It's Good
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Are your vapor barriers actually protecting your home? Learn why building code minimums often fall short of real protection.
The International Residential Building Code sets a minimum requirement of 6 mil polyethylene plastic for a crawl space. However, meeting this code standard does not mean you have the best protection for your home. While 6 mil plastic technically satisfies the rules, it is often comparable to thin contractor trash bags rather than a durable, long-term solution for moisture control. Homeowners should understand that the bare minimum is rarely the most effective choice for...
Why Fiberglass Under Your Floor Fails
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Stop struggling with cold floors despite having insulation. Learn why your home insulation might be failing and how to fix it.
Many homeowners assume that adding material under their floorboards automatically solves comfort issues. However, there is a significant gap between theoretical R-values and actual performance. This guide breaks down the common insulation problems that prevent your home from retaining heat properly, focusing on why your investment might not be delivering the warmth you expect.
We examine how installation errors like compression, gaps, or loose material allow air to...
Gable Vents May Be HURTING Your Attic Ventilation
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Attic gable vents often cause more harm than good. Learn why these vents can ruin your roof ventilation and airflow efficiency.
Many homeowners assume adding vents improves air circulation, but improper installation creates significant attic ventilation problems. With 20 years of experience, I break down why attic gable vents frequently conflict with other ventilation systems. If you have a mixed ventilation setup, you might be trapping heat and moisture instead of removing it.
This guide helps you identify if your current roof ventilation is actually working against you. We examine...
Powered Gable Fans, Why They Almost Never Work
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Stop installing powered gable fans until you see how they can ruin your attic ventilation. Learn why this common setup can fail.
Many homeowners install powered gable fans hoping to cool their attic, but this one in, one out configuration often creates more problems than it solves. This video breaks down the physics of attic airflow and why forcing air movement can actually work against your home's natural ventilation system.
We examine why a balanced ventilation system is superior to mechanical fans and what you should do instead. If...
Why Your Gable Vents and Ridge Vent Are FIGHTING Each Other
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Are gable vents ruining your attic ventilation? Learn why mixing intake methods can actually block proper airflow and heat removal.
This video breaks down the mechanics of attic airflow, specifically focusing on the conflict between gable vents and ridge vents. Many homeowners mistakenly add multiple ventilation types, thinking more is better, but this often disrupts the stack effect. We analyze how wind patterns and pressure changes interact with your roof design to determine if your current setup is helping or hurting your home energy efficiency.
By understanding how cool...
Did Your Insulation Contractor BLOCK Your Soffit Vents?
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Is your attic insulation causing higher energy bills? Discover why blocking soffit vents ruins your home cooling efficiency.
Many homeowners struggle with an overheated upstairs without realizing the culprit is poor attic ventilation. This video explains how insulation contractors often inadvertently block soffit vents during installation, trapping heat and preventing your home from breathing properly. We walk through exactly what happens when these vents are obstructed and why it matters for your comfort.
You will learn how to identify if your airflow is compromised and what to look for...
Hot Bonus Room? A Mini Split May Not Be the Answer
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Is your bonus room over the garage always hot in the summer, even though your air conditioner seems to be working fine? Many homeowners are told to install a ductless mini split, but that may only treat the symptom instead of fixing the real problem. Before you spend thousands of dollars on another HVAC system, it's important to understand why bonus rooms become uncomfortable in the first place.
In this video, Michael Church from Crawl Space Ninja explains why knee walls, attic air leaks, poor insulation, leaky ductwork, and attic ventilation...
Why Your Bonus Room Is Always Hot
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Is your bonus room always hot in the summer and freezing in the winter? Most homeowners are told to add more insulation, replace the windows, or install a bigger HVAC system. Unfortunately, those expensive fixes often miss the real problem.
In this video, I explain the building science behind uncomfortable bonus rooms and show you why air sealing is almost always the first step. You'll learn where conditioned air escapes, how knee walls affect comfort, and why sealing before insulating can make a dramatic difference.
In this video you'll...
That New Attic Insulation? It's Probably Installed Wrong
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You can drop thousands on blown-in attic insulation and still live with drafts, a scorching second floor, and energy bills that refuse to budge. The uncomfortable truth is that insulation is not an air barrier. If air can move through your attic floor, fiberglass will not stop it, it will only hide it. We walk through the one rule that changes everything for home energy efficiency: seal first, insulate second.
We break down how the stack effect turns your house into a chimney, pushing warm air out through attic leaks in...
Knee Wall Insulation: Why Finished Attic Rooms Are So Hot!
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Is your finished attic, bonus room, or room over the garage always hotter than the rest of the house in summer and colder in winter? Most homeowners assume they need a bigger HVAC system, but the real problem may be hiding behind a knee wall in the attic.
In this video, Michael Church from Crawl Space Ninja explains one of the most overlooked attic insulation and air sealing problems: open floor cavities behind knee walls. You'll learn why fiberglass insulation alone often fails, what building scientists call "wind washing," how attic...
Attic Ventilation Explained: Soffit Vents, Ridge Vents, and Why Your Attic Still Gets Hot
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Is your attic hot even though you have ridge vents, soffit vents, or even a powered attic fan? You're not alone. Many homeowners spend thousands on attic ventilation upgrades and still end up with high energy bills, uncomfortable rooms, and overheating HVAC systems.
In this video, I explain how attic ventilation actually works, why balanced airflow matters, and the biggest mistakes I see during attic inspections. You'll learn the difference between soffit vents, ridge vents, gable vents, and powered attic fans—and why more ventilation is not always better.
Mo...
Radiant Barrier, Will It Fix a Hot Upstairs Room?
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Radiant barrier can help with a hot upstairs room — but only if the right things are already in place underneath it. In this video, I break down exactly what radiant barrier does, what it does not fix, and why installing it before air sealing, duct sealing, and proper insulation is one of the most common and costly mistakes homeowners make.
I also cover the one situation where radiant barrier makes the most sense — and when the timing actually works in your favor.
If your upstairs is hot and you are...
Why Your Upstairs Is Hot Even With Good AC
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Is your upstairs always hot even when your AC is running? You're not imagining it — and your AC probably isn't broken. In this video, Crawl Space Ninja founder Michael Church explains the five real reasons your second floor stays hot all summer long, and exactly what to do about each one.
We cover attic heat and radiant heat transfer, air sealing and the stack effect, leaky ductwork running through hot attics, poor attic ventilation, and HVAC airflow imbalance in two-story homes. If you've been blaming your AC, this video will change ho...
The Biggest Crawl Space Lie Homeowners Still Believe
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Crawl space vents don't dry out your crawl space — they make it worse. In this video, Crawl Space Ninja founder Michael Church explains why open crawl space vents cause mold, wood rot, and poor indoor air quality in your home. Learn the building science behind crawl space moisture, the stack effect, and the simple 3-step fix to seal your crawl space the right way.
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Never Use 6 Mil Vapor Barrier in Crawl Space (Here's Why It Fails)
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If a contractor tells you 6 mil plastic is good enough for your crawl space vapor barrier, they're either lying or don't know what they're talking about. In this video, I'll show you exactly why 6 mil vapor barriers fail, what it's costing you, and what you should use instead.
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Soft Floors and High Humidity? Your Crawl Space Has a Serious Problem
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Most people never look in their crawl space, but that hidden space can quietly change the air your family breathes every day. We walk through three practical warning signs you can check from inside the house right now: a musty odor that shows up when the HVAC turns on, hardwood floors that feel ridged from cupping, and a simple humidity test using your HVAC registers.
We dig into why these clues matter and how they connect to real crawl space moisture problems like high humidity, mold growth, damp soil, and even...
I've Seen $15K in Mold Damage From "Code-Compliant" Basement Insulation (Do This Instead)
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Basement insulation mistakes are costing homeowners thousands - even when they pass building code inspections. In this video, I reveal the biggest basement insulation problems I see after 20+ years in the field, and show you exactly how to insulate your basement the RIGHT way for maximum energy efficiency and zero moisture problems.
🚨 CRITICAL TOPICS COVERED:
✅ Why building code minimum requirements will fail you
✅ Best practices for basement wall insulation (R-values that actually work)
✅ Worst practices that create mold and moisture problems
✅ Fiberglass batts vs rigid foam insulation (the truth)<...
Danger! Backyard Chicken Coop Deadly Fungus Threat (Histoplasmosis)
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There is a confirmed Histoplasmosis outbreak in Tennessee, and many homeowners, chicken keepers, and DIYers don’t realize how easily this airborne fungal disease can be stirred up around their homes.
In this video, I explain:
• What Histoplasmosis is and why it’s dangerous
• How spores live in soil, chicken coops, crawl spaces, attics, and bat droppings
• Why disturbing soil, cleaning coops, or renovating without protection can put you at risk
• The difference between acute, chronic, and disseminated histoplasmosis
• Why symptoms are often misdiagnosed as flu or tuberculosi...
Your House Is Poisoning You This Winter (Stop Doing These 3 Things)
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Your home's indoor air is 2-5X MORE polluted than outdoor air - and it gets even worse in winter. In this video, I'm exposing the 3 biggest mistakes homeowners make that are actually DESTROYING their indoor air quality (and one of them, you probably think is helping you).
After inspecting thousands of crawl spaces, basements, and homes, I've seen firsthand what's making families sick every winter. Most people have NO idea they're breathing in mold spores, VOCs, carbon monoxide, and dust mite feces all day long.
🚨 IN THIS VIDEO YOU...
Why Snakes Keep Coming Back to Your House (Most Repellents Fail)
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Snakes don’t just randomly show up at your house—and they definitely don’t leave just because you spread a repellent.
If you keep seeing snakes around your home, crawl space, porch, or yard, there’s a reason. In this video, I explain why snakes keep coming back, why most snake repellents fail, and what actually works long-term.
We break down:
What truly attracts snakes to a propertyWhy ultrasonic devices, mothballs, and DIY fixes don’t workHow crawl spaces, vents, and ducts become entry poin...Mold, Rot & Pests — The Hidden Crawl Space Cascade
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If you enjoy this video about Mold, Rot & Pests, you’ll get a lot of value from my video “Top Termite Myths EXPOSED: Don’t Fall for These Costly Lies!” https://youtu.be/aWVwRj6Mcwk
Ready to work with us 1 on 1 and fix your crawl space? Schedule a consultation or download our Crawl Space Inspection guide here: https://buymeacoffee.com/csninja/extras
Moisture in your crawl space triggers a dangerous chain reaction—mold growth, wood rot, termites, structural damage, and unhealthy indoor air. In this video, Michael Church explains the crawl...
The Truth About Termites: Lies, Myths & Bad Advice — EXPOSED
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Learn the real truth about termites — before they destroy your home.
In this video, Michael Church from Crawl Space Ninja breaks down the most common termite myths, lies, and falsehoods that cost homeowners over $5 billion every year. From DIY sprays to brick-home myths to moisture problems in crawl spaces and basements, we reveal what really attracts termites and what actually works to stop them.
Whether you own a home or invest in real estate, this video will help you avoid bad advice, wasted money, and serious structural damage. Termites are si...
From Mold To Market Value: The Real Reasons People Fix Crawl Spaces
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The air you breathe and the floors you walk on both depend on what’s happening under your feet. We take you beneath the house to reveal the three real reasons homeowners choose crawl space encapsulation: healthier indoor air, a stronger structure, and smoother real estate transactions. Along the way, we cut through common myths, explain why quick patches often backfire, and share the steps that turn a damp, musty space into a clean, controlled foundation for your home.
First, we focus on indoor air quality and moisture control. Mold and du...
Stop Using Your AC To Dry The Basement or Crawl Space
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Cold air can fool you. A basement can feel crisp at 60 degrees while humidity sneaks past 70% and turns prized gear into mold bait. We bring on Alex Hamilton from Aprilaire to demystify why HVAC systems are built to control temperature, not moisture, and how that gap leads to musty smells, surface mold, and ruined finishes in basements and crawl spaces.
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We start with the classic contractor mistake...
Dormant Mold, Real Risks, Smart Fixes
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ver wondered why “dormant mold” keeps coming back the moment the seasons change? We pull back the curtain on what dormant really means, why 50–55% humidity isn’t a cure by itself, and how a moldy subfloor turns into a hidden hazard when spray foam goes on too soon.
20% OFF DIY Products Code: "youtube" Use at https://supply.crawlspaceninja.com10% OFF DIY Mold Testing: https://fas.st/t/8cfyT8P3AJ joins me to tackle a real homeowner question from a 1927 house with a tight crawl space and visible mold. We break down the...
Wet Basement Déjà Vu? Your Waterproofer Missed Something
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Are you feeling frustrated after spending thousands on basement waterproofing only to still find water seeping in? You're not alone. This crushing disappointment is the most common complaint we hear from homeowners who've been caught in the partial solution trap.
The truth is shocking: many contractors install quick fixes like interior drains or waterproofing paint without addressing where water actually comes from. They're treating symptoms while ignoring causes like poor exterior grading, failing downspouts, and hydrostatic pressure beneath your foundation. Basement waterproofing isn't a single solution but an integrated system...
Waterproofing Your Home: Why "It Never Happened Before" Isn't Good Enough
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Water will eventually find its way into your home—it's not a question of if, but when. This fundamental truth challenges the common homeowner refrain: "I've lived here for 25 years and never had water before!" As our experts explain, just because you haven't experienced a major flood doesn't mean water hasn't been infiltrating your foundation for decades.
When homes are built, contractors disrupt virgin soil to create foundations, then backfill around them. This backfilled soil never fully compacts to its original density, creating what professionals call a "bowl effect"—a perfect path...
Maintenance Matters: Protecting Your Home's Mechanical Systems
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Neglect is the silent killer of home mechanical systems. Michael Church and Stephen Malpass dive deep into a shocking discovery at a beach house where a never-maintained dehumidifier had developed what professionals call "zooglea" - a foul-smelling bacterial growth that resembles "the jelly from a Costco chicken bag, but four times nastier."
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This conversation reveals the critical distinction many homeowners miss: the...
Why Crawl Space Encapsulation Actually Costs $15,000, Not $1,500
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Tired of misleading information about crawl space encapsulation costs? In this frank, no-nonsense episode, I cut through the confusion to reveal what you'll actually pay for quality crawl space work and why those $1,500-$4,000 estimates you see online are dangerously inaccurate.
Drawing from years of industry experience, I break down the real factors that determine crawl space encapsulation pricing. We explore the crucial difference between DIY and professional work, including the often-overlooked value of your time. Would you rather spend 3-4 weeks crawling under your house, or have professionals complete the...
The Hidden Dangers of Mold Growing on Your Crawl Space Soil
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That fuzzy growth on your crawl space soil isn't just "dirt being dirt" – it's a potential health hazard silently affecting your home and family. Most homeowners don't realize that the perfect mold habitat exists right beneath their feet, with all five essential growth factors readily available.
Clay soil in your crawl space acts like a nutrient-rich refrigerator for mold, storing organic matter and vital minerals while holding moisture like a sponge – up to 55% by volume according to Cornell University research. Combined with adequate oxygen and the comfortable 60-80°F temperature your home...
The Hidden World of Book Lice: Why They Thrive, What They Signal, and How to Stop Them
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Think “book lice” sounds like a punchline? The reality is stranger—and way more useful. We pull back the curtain on these nearly invisible insects to reveal what they really eat (mold), why they show up in pantries, basements, and even electronics, and how their presence is less a bug problem and more a building problem. Along the way, we explain what makes a species “cosmopolitan,” how book lice can clone themselves through parthenogenesis, and why a single speck can snowball into thousands when humidity climbs.
Dust mites video: https://youtu.be/OaP7klQ...
Six Insulation Spots for Vented Crawl Spaces
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Ever wondered why your floors are cold despite having insulation in your crawl space? The secret lies in understanding exactly where and how to insulate properly. Most builders miss critical spots, leaving your home vulnerable to energy loss, moisture problems, and pest infiltration.
Crawl space insulation isn't just about stuffing fiberglass between floor joists. As Michael explains in this eye-opening episode, there are six specific areas that require attention in a ventilated crawl space: rim joists, sill plates, subfloor penetrations, the subfloor itself, ductwork, and water pipes. Each area demands different...
Why Your Mold Treatment Might Not Be Working
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Struggling with persistent mold despite treatment? You're not alone. Today's episode tackles a common frustration homeowners face when mold remediation efforts fall short of expectations.
We dive into a question from Rod in Maryland, who discovered mold still present in his crawl space after professional Concrobium treatment. The answer lies in understanding two critical distinctions in the world of mold control: the difference between viable and non-viable mold testing, and the specific conditions required for treatments to work effectively.
Many homeowners don't realize that mold tests can show "positive"...
DIY Dehumidifier Solutions: Introducing Aprilaire's Wi-Fi Controller
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Tired of worrying about humidity levels in your crawl space while you're away from home? The technology landscape for home moisture control is evolving rapidly, and we're excited to share a game-changing solution with you.
Meet AJ, our DIY specialist who's been helping Crawl Space Ninja customers tackle their moisture control projects for three years. In this conversation, AJ breaks down everything you need to know about the new Aprilaire dehumidifier Wi-Fi controller – a retrofit device that brings smart technology to your existing Aprilaire dehumidifier. Unlike newer models that come with bu...
Soggy Yard? Meet the Drainage Solution MLB Can't Live Without
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Ever wonder why some yards bounce back from heavy rain while others stay muddy for days? The secret lies in drainage technology, and as our conversation with Joe Zellerman of Hydraway reveals, not all drainage systems are created equal.
Did you know the iconic Field of Dreams baseball field—site of MLB's most-watched game ever—relies on Hydraway drainage? When a deluge of three to four inches of rain fell the night before this historic game, groundskeepers were still able to mow the next morning. The system worked so efficiently they need...
Underneath Your Floorboards: A Real-Life Horror Story
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What sounds like fiction torn from a horror screenplay unfolded as disturbing reality in Clackamas County, Oregon. Deputies responded to a neighbor's late-night call and discovered something truly unsettling – a man had transformed the crawlspace beneath a quiet condo into a fully-functioning miniature apartment, complete with string lights, a flat-screen TV, and even gaming equipment.
The culprit, 40-year-old Benjamin Bucur, had a lengthy criminal history spanning multiple states. He had not only broken into the crawlspace but had changed the locks, installed himself comfortably, and was stealing electricity from the condo ab...
Two Game-Changing Basin Installation Techniques Your Waterproofing Contractor Isn't Using
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Ever wondered why some homeowners struggle with basement flooding despite having sump pumps installed? The secret often lies not in the equipment itself, but in the installation techniques.
In this eye-opening discussion, Michael Church, the Crawl Space Ninja and Basement Waterproofing Ninja, reveals two game-changing installation methods that separate professional waterproofing from amateur attempts. Michael identifies the notorious "cove" – the junction where your foundation wall meets the footer – as the primary water entry point in most homes and explains how proper basin installation addresses this vulnerability.
The first critical tech...
Crawl Space Humidity Myths Debunked
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Moisture problems lurking beneath your home? Crawl Space Ninja Michael Church cuts through the confusion with this eye-opening compilation on crawl space humidity myths that could be damaging your home's foundation.
Have you been told that simply laying down a vapor barrier will solve your humidity problems? Michael reveals why this common "solution" falls short. What many contractors call a vapor barrier is actually a vapor retarder – it slows moisture migration but doesn't eliminate it completely. If someone has promised that plastic alone will maintain healthy humidity levels under your home, yo...
What Your Mold Remediation Contractor Isn't Telling You
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What your mold remediation contractor isn't telling you could be costing you thousands in unnecessary repairs. Drawing from years of experience in crawl space restoration, Michael Church exposes four dangerous myths about mold treatment that continue to circulate among homeowners and even professional remediation companies.
The first misconception involves contractors claiming they can treat mold while leaving insulation in place between floor joists. This approach makes proper treatment physically impossible, as disinfectants cannot reach wood surfaces behind insulation. The only effective protocol requires complete insulation removal to ensure all affected surfaces...
