How To Remove Mold From Crawl Space Yourself? (The Ultimate Guide) | Yard Life Master (2024)

Mold in your crawl space can be an unpleasant surprise, but it doesn’t have to be a big problem.

With the right steps, you can remove mold from your crawl space yourself and keep it from returning.

In this ultimate guide, we will walk you through the process of mold removal, from understanding what causes mold in crawl spaces in the first place to choosing the right cleaning solutions to installing a dehumidifier to keep mold from coming back.

So, if you’re ready to tackle the task of mold removal in your crawl space, let’s get started!

Table of Contents

Short Answer

Removing mold from your crawl space yourself is possible but requires safety precautions.

Start by making sure the area is well-ventilated, and wear protective clothing and a respirator.

Then, use a scrub brush and a bleach-water mixture to scrub the affected area.

Let the area dry completely before sealing it to prevent additional mold growth.

Finally, make sure you are regularly monitoring the area for any further mold growth.

What Causes Mold in Crawl Spaces?

Mold in crawl spaces can be caused by a variety of different factors.

High levels of humidity, poor ventilation, and condensation are all common causes of mold growth in these areas.

In addition, water leaks or flooding can be the source of mold growth.

Since crawl spaces are often dark and damp, they provide the ideal environment for mold to thrive and quickly spread.

As such, it is important to address any issues that may be causing mold growth in your crawl space as soon as possible.

Preparing for Mold Removal

How To Remove Mold From Crawl Space Yourself? (The Ultimate Guide) | Yard Life Master (1)

When it comes to removing mold from a crawl space, the most important first step is to prepare the space for the job.

This involves making sure that the walls and floor of the crawl space are properly sealed so that any moisture that enters wont be able to promote mold growth.

To do this, you will need to look for any cracks, gaps, or holes in the walls and floor and seal them with a quality sealant.

It is also important to make sure that the space is well-ventilated, as this will help to reduce the humidity levels and discourage mold growth.

Once the space is properly prepared, you can then move on to the actual task of removing the mold.

Locating and Sealing Cracks and Gaps

Locating and sealing cracks and gaps in your crawl space is an essential first step when it comes to removing mold.

Cracks and gaps in walls and floors can be entry points for moisture, which can then lead to mold growth.

To locate and seal these cracks and gaps, youll need to inspect the walls and floors of the crawl space for any visible cracks or gaps.

If youre unable to find any visible cracks or gaps, you may need to use a moisture meter to check for areas of high humidity, which could indicate the presence of hidden cracks or gaps.

Once youve located any cracks or gaps, youll need to seal them with a sealant or caulk to prevent any additional moisture from getting in.

This will help to reduce the risk of mold growth in your crawl space in the future.

Cleaning the Crawl Space

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Cleaning the crawl space is an essential step in removing mold and preventing its return.

To start, you need to locate and seal any cracks, gaps, or holes in the walls and floor of the crawl space.

These can be entry points for moisture, which can lead to mold growth.

To seal these, use a caulk or expandable foam to fill any gaps, then use a waterproof sealant to cover any cracks or holes.

Once the space is sealed, you can use a mixture of water and bleach to scrub down the walls and floor.

Pay special attention to any areas with visible mold, as this will need to be removed in order to prevent it from returning.

Make sure to wear protective gear, such as a face mask and gloves, when working with bleach.

Once the walls and floor have been scrubbed, rinse the area with clean water and let it dry completely.

Finally, install a dehumidifier in the crawl space and check it regularly to ensure the humidity levels remain low.

This will help ensure the area stays dry and free from mold growth.

Consider investing in a dehumidifier with a built-in humidistat, which will automatically turn off the unit when the desired humidity level has been reached.

With these steps, you can effectively remove mold from your crawl space and keep it from returning.

Cleaning the crawl space may seem like a daunting task, but with the right supplies and knowledge, you can do it yourself and keep your crawl space mold-free.

Choosing the Right Cleaning Solutions

When it comes to removing mold from a crawl space, its important to choose the right cleaning solutions.

Bleach is often recommended as a good agent for killing mold, but its important to be aware that bleach can be damaging to surfaces, and it can also be hazardous to your health if it is not used properly.

When using bleach to clean your crawl space, its best to mix it with water in a 1:10 ratio and use it in a well-ventilated area. Its also important to use protective clothing such as gloves, safety glasses, and a face mask when handling bleach.

Other cleaning solutions that can be used to remove mold from a crawl space include vinegar, hydrogen peroxide, and baking soda.

Vinegar is a natural cleaning agent and is effective at killing mold, but it may not be as effective as bleach.

Hydrogen peroxide is a strong oxidizer and can be used to kill mold, but it can also damage fabrics and surfaces.

Baking soda is a mild abrasive that can help to remove surface mold, but it will not be as effective at killing mold as chlorine bleach.

Its important to note that some molds can be resistant to certain cleaning solutions, so its important to research the type of mold youre dealing with and choose the best cleaning solution for the job.

Additionally, it’s always best to test any cleaning solution on a small, inconspicuous area before using it on the entire crawl space.

Installing a Dehumidifier

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Installing a dehumidifier in your crawl space is an important step in removing mold and preventing it from returning.

Dehumidifiers help to reduce the amount of moisture in the air, which is essential for mold growth.

By keeping the humidity levels in your crawl space low, you can stop the mold from growing and spreading.

When selecting a dehumidifier for your crawl space, make sure to choose one that is powerful enough to handle the size of the space.

It should also be Energy Star rated to ensure it is running efficiently and not costing you too much in electricity bills.

Once you have the right dehumidifier for the job, it’s time to install it.

First, make sure the area youre installing the dehumidifier is clean and free of debris.

Then, place the dehumidifier in the middle of the room.

Plug it in and turn it on.

Set the dehumidifier to the desired humidity level and make sure it is running properly.

It’s important to check your dehumidifier regularly to ensure it is working properly.

Make sure to empty the water collection tray when it is full and check the filters to make sure they are clean.

If you notice any build-up of mold or mildew, use a vacuum cleaner to remove it.

By regularly maintaining your dehumidifier, you can ensure it is working properly and keeping your crawl space mold-free.

Keeping Mold From Returning

Once youve successfully removed the mold from your crawl space, the next step is to take measures to prevent it from returning.

The key to keeping mold from growing in the crawl space is controlling humidity levels.

Mold needs moisture to grow, so keeping the humidity low is essential.

Start by installing a dehumidifier in the crawl space.

This will help to reduce the moisture levels and prevent mold from growing.

Make sure to check the dehumidifier regularly and empty the tank when its full.

Additionally, inspect the crawl space for any signs of water or moisture and address the issue as soon as possible.

If you detect any water, you should take steps to dry out the area and repair any leaks or cracks that may be causing the moisture.

You should also consider using air purifiers in the crawl space to help keep the air clean and free of mold spores.

Air purifiers work by removing airborne particles, including mold spores, from the air.

This can help prevent mold from growing and spreading in the crawl space.

Finally, make sure that the crawl space is well-ventilated.

This means keeping the vents open to allow air to flow freely through the space.

Good ventilation can help to reduce humidity levels and keep mold from growing.

By following these steps, you can effectively keep mold from returning to your crawl space and keep your home safe and healthy.

Final Thoughts

With the right preparation and knowledge, you can effectively remove mold from your crawl space and keep it from returning.

Preparing the space by locating and sealing any cracks, gaps, or holes in the walls and floor is key.

Then use a mixture of water and bleach to scrub down the walls and floor, paying special attention to any areas with visible mold.

Finally, install a dehumidifier in the crawl space and check it regularly to ensure the humidity levels remain low.

Now that you know the steps to take, take action and start removing the mold from your crawl space today!

How To Remove Mold From Crawl Space Yourself? (The Ultimate Guide) | Yard Life Master (2024)

FAQs

How To Remove Mold From Crawl Space Yourself? (The Ultimate Guide) | Yard Life Master? ›

Vinegar. One of the most popular house cleaning tips for removing mold is to use vinegar since it kills many bacteria, including molds. Just mix vinegar and water in a 1:1 ratio in a spray bottle. Spray all over the affected crawl space walls or floor.

What can I spray in my crawl space to kill mold? ›

Vinegar. One of the most popular house cleaning tips for removing mold is to use vinegar since it kills many bacteria, including molds. Just mix vinegar and water in a 1:1 ratio in a spray bottle. Spray all over the affected crawl space walls or floor.

How do I get rid of black mold under my house? ›

For a natural solution for getting rid of black mold, combine one part baking soda with five parts distilled white vinegar and five parts water in a spray bottle. Alternatively, you can use a chemical-based mold and mildew remover, all-purpose cleaners, bleach or dish soap.

How do I keep my crawl space mold free? ›

6 Ways to Prevent Mold Growth in Your Crawl Space
  1. Tip 1: Inspect your foundation walls.
  2. Tip 2: Check your gutters and downspouts.
  3. Tip 3: Look for any leaks.
  4. Tip 4: Insulate crawl space pipes.
  5. Tip 5: Consider a vapor barrier.
  6. Tip 6: Adequately ventilate your space.

How long does it take to remove mold from a crawl space? ›

MOLD REMOVAL CRAWL SPACES:

Expect: 1 day to 10 days depending on the size of the area in need of treatment, also is it a tight crawl space or plenty of working rooms.

Does vinegar spray kill mold? ›

Yes, vinegar is a mild acid that kills 82% of mold species. It's often used as a natural and nontoxic alternative to cleaning chemicals when it comes to killing household mold.

Can I use a mold fogger in crawl space? ›

In this crawl space we will use a machine designed for cleaning mold, known as the mold fogger. With the hose attached and the chemical Mold-X added to the machine, a fog is produced and distributed evenly throughout the crawl space, killing the active mold spores.

What kills black mold permanently? ›

'Bleach will kill mold spores growing across a hard surface, but if the mold has extended below the surface, then white vinegar is the best choice,' she says. 'The vinegar will penetrate to kill the mold and mildew at the root, preventing it from regrowing.

Can black mold be removed permanently? ›

The only effective way to permanently get rid of mould problems is by reducing the build-up of moisture in your home. This can only be achieved through better ventilation.

Is bleach or vinegar better for mold? ›

While it is possible to use bleach to kill mold as well, experts agree that vinegar is a much better option. Unlike bleach, vinegar can effectively kill the mold at the root, which means it's less likely to return. Vinegar is also less toxic than bleach, making it a better choice for household use.

Can you use Damprid in crawl space? ›

Great for basem*nts, second homes, storage units, laundry rooms, crawl spaces, stored boats & RVs, storm and flooding cleanup, and more.

What can I put under my house to absorb moisture? ›

Use a Rock Salt Dehumidifier

Because rock salt is hygroscopic it absorbs moisture from the air. If your plan is to get rid of the humidity in a damp basem*nt, start with a 50-pound bag of sodium chloride to make your rock salt dehumidifier. These can be found at most big box hardware stores.

Do you need to remove mold from crawl space? ›

Crawl space mold removal is needed in order to make sure the mold is cleaned properly and prevented from returning. Mold needs moisture to grow and this moisture can come from high humidity or a leak but the more moisture mold in the crawl space receives the faster it will grow.

Will mold grow back after cleaning? ›

Indoor mold growth can and should be prevented or controlled by controlling moisture indoors. If there is mold growth in your home, you must clean up the mold and fix the water problem. If you clean up the mold, but don't fix the water problem, then, most likely, the mold problem will come back.

What is the best mold removal product? ›

5 Best Mold Removal Products
  • RMR-86 Instant Mold and Mildew Stain Remover Spray.
  • Tilex Mold & Mildew Remover 16 Fl Oz.
  • Concrobium Mold Control Household Cleaners.
  • Professional Disinfecting Mildew, Virus & Mold Killer – Cleans & Deodorizes, Lemon Scent.
  • Mold Armor Cleaner.
Nov 14, 2022

How much mold is too much in crawl space? ›

There is no acceptable level of mold in a crawl space. Mold doesn't belong in a crawl space, period. Even a small amount of mold in a crawl space will grow and spread, and since – as we noted above – some of the air in the crawl space enters your home, you need to aim for zero mold in the crawl space.

Will mold come back after vinegar? ›

Vinegar successfully kills mold on drywall and leather.

This means that the mold is likely to grow back. When bleach is used on porous surfaces, the mold will move deeper into the material to avoid it.

What kills mold better than vinegar? ›

Hydrogen peroxide can remove mold.

However, it's also a powerful mold killer, especially with solutions that have more than 3 percent of hydrogen peroxide concentration. Hydrogen peroxide is best used on porous and non-porous surfaces, including clothing, bathroom items, and even kitchen appliances.

How long does it take for vinegar to kill mold spores? ›

Let the vinegar sit for at least an hour. Using a brush with soft bristles, scrub the moldy surface until the mold comes off. If you're scrubbing a rougher surface you might need a thicker brush. Dry the area completely with a clean rag and throw away the used rag and brush.

What is the best way to remove moisture from a crawl space? ›

How to Keep Your Crawl Space Moisture Free
  1. Make Sure Your Foundation Is Insulated. Basem*nt waterproofing should be the first step to take if you want to keep your crawl space moisture-free. ...
  2. Get a Dehumidifier. ...
  3. Drain Your Crawl Space Better. ...
  4. Cover the Floor of Your Crawl Space. ...
  5. Use A Fan.
Jul 25, 2019

What do you spray in a crawl space? ›

Spray foam insulation is the best insulation for crawl spaces. It provides a tight, air-sealed barrier in crawl spaces to prevent air and moisture from entering your living area.

How do you air out a damp crawl space? ›

Airing out your Crawl Space
  1. Transfer a small supply of heated air from the HVAC system into the crawl space.
  2. Use an exhaust fan to move air from the crawl space to the outside.
  3. Install an air intake or dehumidifier system.
Mar 15, 2018

What kills mold the fastest? ›

In such cases, a solution of diluted bleach provides the fastest way to kill mold on walls or flooring. Prepare the solution by adding one cup of bleach into a bucket that contains about a gallon of warm water. Then proceed to scrub the mold vigorously with a stiff-bristled brush you've dipped in the bleach solution.

What kind of vinegar kills mold? ›

Using White Distilled Vinegar to Kill Mold. White vinegar is most commonly found with 5% acidity and works best undiluted, so don't worry about mixing it with water first.

What is the best natural black mold killer? ›

Vinegar. White distilled vinegar is an affordable, natural solution to removing black mold. Its antibacterial acidic characteristics are exactly what you need to get the job done. Pour the undiluted vinegar into a spray bottle to apply to the area, or just go for it and pour that vinegar right onto the mold stains.

Can I safely remove black mold myself? ›

Homeowners can handle cleaning about 10 square feet (roughly 3 feet by 3 feet) of black mold on their own. If the patch is small enough, a combination of bleach, water, scrubbing, and ventilation should do the trick. Before treating mold on your own, prioritize ventilation and protective gear.

Can you ever fully get rid of mold? ›

According to the Environmental Protection Agency (EPA), “There is no practical way to eliminate all mold and mold spores in the indoor environment; the way to control indoor mold growth is to control moisture.” Even if you clean the mold, it will come back if the room is humid and poorly ventilated or if there is ...

What happens if black mold is left untreated? ›

Symptoms of black mold infection (also called “toxic mold”) can be very severe, especially if it is untreated for a long time, or when someone has a mold allergy. An infected person experiences nausea, vomiting and may also have nosebleeds, and in severe cases, bleeding in the lungs.

Is vinegar better than hydrogen peroxide for mold? ›

Distilled white vinegar is non-toxic but acts much more slowly than chlorine bleach or hydrogen peroxide. While it will kill the mold, the discoloration and stains may remain and require additional scrubbing with a household cleaner. Distilled white vinegar can be used safely on most porous and non-porous surfaces.

Is it better to clean with bleach or vinegar? ›

So the answer to the titular question is vinegar. Vinegar is better for cleaning. But that's because bleach isn't intended for cleaning, but for disinfecting. And, by the way, if you want to use bleach for disinfecting, make sure the area you want to treat is clean (and rinsed clean, if you used vinegar!)

What kills mold better bleach or hydrogen peroxide? ›

Even the hydrogen peroxide-based cleaning agents, that advertise that they remove stains, still leave plenty of stains behind. Seeing the mold stains left behind after you've treated and scrubbed your mold is not very satisfying and is; therefore, the reason why we recommend bleach-based cleaning agents.

Is DampRid better than a dehumidifier? ›

But is DampRid as good as a dehumidifier? "While DampRid is nowhere near as rapid or effective as a good dehumidifier, it almost works the same as a poor-performing dehumidifier," says Chris.

Does DampRid stop mold? ›

DampRid Fragrance Free Hanging Moisture Absorber attracts and traps excess moisture from the air, eliminating musty odors and inhibiting mold and mildew. DampRid's crystals absorb excess moisture out of the air to create optimal humidity.

What do you put in a dirt crawl space? ›

Crawl space encapsulation.

Dirt floors allow moist air and water to enter the crawl space. You need to hold back this moisture. And the best way of doing this is by encapsulating the crawl space. It involves laying down a 20-mil polyethylene plastic vapor barrier over the crawl space floor and walls.

What is the best fan to dry out a crawl space? ›

The most popular fan is the ATMOX Internal Fan with 145 CFM, which operates quietly and keeps air moving throughout the crawl space. The ATMOX Interna Fans with 225 CFM has a very specific application. Fan can add ducting to get air to areas beyond location of the fan.

What is the best moisture absorber? ›

  1. DampRid FG50T Moisture Absorber. BEST FOR LARGE SPACES. ...
  2. Wisesorb Food Grade Clay Packs. BEST FOR FOOD CONTAINERS. ...
  3. Dry & Dry Food Safe Silica Gel Packs. A SILICIA OPTION. ...
  4. Eva-Dry Wireless Mini Dehumidifier. ...
  5. Vacplus Moisture Absorber. ...
  6. Nature Fresh Bamboo Charcoal Air Purifying Bags. ...
  7. DampRid Drop-in Tab Starter Kit.
Sep 26, 2021

Can you remove mold without scrubbing? ›

Vinegar typically performs best on mold when it is used undiluted in full strength. Simply transfer the white vinegar into a spray bottle. Spray the vinegar directly onto the mold. Do not rinse or scrub.

What happens if you clean mold without a mask? ›

If you're not wearing any Personal Protective Equipment (PPE), you're inviting all of those mold spores to settle on your clothing, the area you're cleaning, your shoes (allowing mold to travel to other areas in your home), in your eyes, and up your nose into your upper respiratory system.

Can black mold in a crawl space get into house? ›

Infestation is likely to worsen if the crawl space is vented or not sealed or encapsulated. As well as entering your home through open doorways, mold can also find its way in through windows and your HVAC systems. Mold from the outside can also attach itself to pets, shoes, clothing and get inside your home.

What stops mold from coming back? ›

To Prevent Mold Growth in Your Home. Keep humidity levels in your home as low as you can—no higher than 50%–all day long. An air conditioner or dehumidifier will help you keep the level low. You can buy a meter to check your home's humidity at a home improvement store.

Does bleach make mold grow back worse? ›

Bleach can contribute to further mold growth

The water travels down to the root of the mold and helps it thrive. This is why mold problems often become worse a few days after bleach is applied. Applying bleach on mold may even cause mold to grow in surrounding areas that were previously unaffected.

What is difference between mold and mildew? ›

Mildew refers to certain kinds of mold or fungus. The term mildew is often used generically to refer to mold growth, usually with a flat growth habit. Molds include all species of microscopic fungi that grow in the form of multicellular filaments, called hyphae.

What is the best mold killer for crawl space? ›

ARMEX blast media is 100% sodium bicarbonate. Sodium bicarbonate is a great media for removing mold and addressing odors in crawl spaces. It has many other uses in the auto body and food cleaning industry as well. It is USDA-approved as an A-1 cleaner and suitable for use in FDA-regulated facilities.

What kills mold in crawl space? ›

One of the most popular house cleaning tips for removing mold is to use vinegar since it kills many bacteria, including molds. Just mix vinegar and water in a 1:1 ratio in a spray bottle. Spray all over the affected crawl space walls or floor. Let it sit for a few minutes, and then scrub the area.

What permanently kills mold? ›

Bleach kills virtually every species of indoor mold that it comes into contact with including mold spores which leaves a sanitized surface making it resistant to future mold growth.

Do all crawlspaces have mold? ›

Any home with an open or vented crawl space is a good candidate for mold growth. Likewise, homeowners with leaky pipes below the ground area, cracks, and organic materials can experience mold growth at some point. If you experience flooding or water seepage, you're also likely to see mold developing over time.

Do most crawl spaces have mold? ›

Basem*nts and crawl spaces are two of the most common areas of mold growth in the home.

What can I put in my crawl space for musty smell? ›

OdorXit AQM (Air Quality Manager) is an oxidation packet that once opened and water is added, can be placed in the musty crawl space and let it work over time (up to 30 days). MOMS is an oxidation powder that is added to water to create a liquid you can apply to the musty odor source with a spray bottle.

Can mold under house make you sick? ›

Exposure to damp and moldy environments may cause a variety of health effects, or none at all. Some people are sensitive to molds. For these people, exposure to molds can lead to symptoms such as stuffy nose, wheezing, and red or itchy eyes, or skin.

Can I put baking soda in my crawl space? ›

Baking soda leaves the crawlspace or other area of the home smelling and looking clean and fresh. The baking soda is a very fine abrasive, meaning that it will not damage surfaces in the crawlspace during the removal process.

Does baking soda stop musty smell? ›

If the musty smell seems to be emanating from a small area like a closet or cupboard, grab some baking soda! Place a small dish of baking soda in the enclosed area for up to 24 hours. The baking soda will absorb excess moisture and odors, and leave things smelling much fresher.

Is closed cell spray foam good for a crawl space? ›

For an existing home, especially in applications such as an attic or crawl space, closed cell spray foam insulation is the best choice.

Is spray foam insulation better than crawl space encapsulation? ›

Encapsulation can help with those foundation leaks, but not thermal transfer. That means you'd still be stuck with cold floors and uncomfortable rooms if you don't also create an air seal. Spray foam insulation is the best insulation option for the crawl space because it creates that air seal.

What happens if you sleep in a house with mold? ›

By breathing in a lot of these mould spores you can develop a variety of health conditions for your lungs such as Hay fever, Sleep apnea, severe coughing, Asthma, and various pulmonary infections. The area where mould is found is very important for minimizing the risk of developing these health issues.

What are the symptoms of mold brain infection? ›

People who live, work, or go to school in moldy buildings complain of pain, fatigue, increased anxiety, depression, and cognitive defects such as memory loss.

What happens if you breathe in mold for a long time? ›

Inhaling or touching mold or mold spores can cause a person to become allergic to mold. Molds can trigger asthma symptoms including shortness of breath, wheezing, or cough in people with known allergies. People who do not have allergies can also become irritated.

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