How To Prevent Mold In Garage? A Few Tips to Remember

Helen Skeates
Helen Skeates
26 min read

When it comes to upkeep, most homeowners neglect their garages, both attached and detached. When garages get waterlogged and moldy, homeowners and occupants finally take action. Once mold has established itself, there is little that can be done except to seek the assistance of trained professionals.

What causes mold in a garage?

In the event of significant precipitation (rain or snow), the wide doors of most garages will allow the water to pass through along with the automobiles. For this reason, garages should be well sealed and mold should be avoided at all costs.

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Having a snowblower or other wet goods within your garage can lead to the growth of mold due to the high levels of moisture and humidity that are generated. Tossing trash around is a surefire way to encourage mold growth. If the garbage bag is kept in the garage for an extended period of time, the mold within could spread to other parts of the garage (and house, if the garage is attached to the house).

To make sure your garage is working properly and safely for you and your family, call Mold Busters for a professional examination and they will send a qualified inspector to your home.

Where does mold grow inside a garage?

Mold thrives in the dark, damp, and humid conditions typical of a garage. Mold spores can attach themselves to organic matter, so damp surfaces in a garage with food spills can be an ideal breeding ground for mold.

Mold on garage walls/drywall

Garage mold thrives in cool, dark, humid conditions. Mold spores can stick to organic material, making a moist garage floor with food spills a prime environment for the fungus’ growth.

Mold on radon pipe inside the garage

As the radon pipe draws cooler air from the earth into the warmer garage, mold thrives there. Condensation forms on the outside of the radon pipe when the two temperature differences combine. Mold can begin growing on the pipe’s exterior if there is enough dust or other particles present. To avoid this, maintain the radon pipe clean by wiping it down with a towel on a regular basis. This will keep any mold from forming on the pipe.

Mold on garage doors

Garage doors are a great place for mold to grow. They have minimal insulation so in the cold winter months, condensation builds on the inside panels if your garage is heated. Mold can flourish in the abundant moisture that results from this. With the right conditions, mold can form on the garage door. Also, poor seals around the door can let water and snow inside the garage also causing moisture issues. Having a professional garage door installer come and adjust the door seals and door will keep this moisture from entering your garage.

What are some types of molds that grow inside a garage?

To say the least, garage doors are a prime location for mold expansion. As a result of their poor thermal performance, they cause condensation to form on the interior panels of a heated garage throughout the winter. This creates an ideal environment for mold growth by providing a constant source of moisture. The accumulation of mold on the garage door could be fueled by dust or other organic matter. Inadequate door weatherization might potentially let moisture in from rain or snow. You can prevent this moisture from entering your garage by adjusting the seals and door with the help of a professional garage door installation.

Black mold in garage

If the conditions are good, black mold can grow almost everywhere. Stachybotrys chartarum is its scientific name. Its growth pattern during colonization is distinctive, and its color is a giveaway. It’s very sticky and forms growth rings. (Never, ever, mess with a mold growth without first putting on safety gear) (PPE).

Green mold in garage

Green mold is another sort of prevalent indoor mold. Green mold can be any one of over a hundred different types of mold. Cladosporium, Aspergillus, and Penicillium are the most typical green molds. These molds, while they’re actively growing, can look like algae because of their greenish hue.

White mold in garage

Third, white mold is another typical variety that could flourish in your garage. The appearance and “texture” of efflorescence on concrete walls can be mimicked by this mold. It has a white tint and looks like fluffy hair. Although it poses less of a health risk than some molds, careful removal is still important.

Contact a Mold Busters inspector to come take a look at your garage if you’ve seen any strange growths inside there. That way, you know your house is secure.

How to identify mold inside a garage?

If you find mold in your garage but aren’t sure what kind it is, you may learn more about mold and the different kinds of mold on our website’s resources pages. However, in this case, it is preferable to have a Mold Busters expert come to your home and conduct extensive examination and testing to determine whether or not mold is present.

Is mold inside a garage dangerous?

Mold in any indoor environment can be dangerous to your health. Mold can cause many different health conditions, including headaches, nausea, respiratory issues and other side effects. Therefore, the best rule of thumb is that if there is any mold growing around the garage, contact Mold busters right away for the proper solutions to ensure your home and family are safe and healthy.

How to prevent mold in garage?

Mold can pose serious health risks and should be avoided whenever it is found inside. Headaches, nausea, respiratory problems, and other symptoms are just some of the many that mold exposure can bring. As a result, a good rule of thumb is that if you notice mold developing in or around the garage, you should get in touch with Mold busters right soon to find the appropriate remedies to make sure your house and family are safe and healthy.

When it comes to keeping mold out of your garage, follow the six steps outlined above to deal with water.

1. Inspect your garage

Observe the state of your garage as a whole. Roof leaks, for instance, can lead to pools in the garage, which, if not dried out thoroughly, can become a breeding ground for mold.

That being said, make it a habit to routinely inspect the garage’s roof, gutters, plumbing, etc (i.e. that nothing is leaking). You should promptly repair any leaks.

2. Good drainage system can save you a lot of problems

There are several ways water can get in your garage – it can be due to heavy rains, snow, and flooding, for example, or you can bring the moisture in with your car. As a result, mold growth inside the garage quickens and structural damage to the building progresses.

3. Organize your garage storage properly

Water can enter your garage in a number of ways, including natural ones (heavy rains, snow, and flooding), as well as manmade ones (your car). In addition to hastening the overall rate at which structural damage to the garage is occurring, this also encourages the growth of mold inside the garage.

Instead of keeping things on the floor of your garage, install some shelves. In the event of prolonged rain, garage flooding may be inevitable. Maintaining dry conditions is essential if you want to keep your items mold-free in such an environment.

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4. Keep humidity under control

Garages provide the ideal circumstances for mold growth since they are damp, dark, enclosed, and humid. To stop mold from taking over your garage, make sure it has enough of ventilation, natural light, and is kept dry.

High humidity, a prevalent problem in areas with few windows, air vents, or any other means of air ventilation, is a major cause of mold (both within and outside the garage). The ideal relative humidity for a garage is between 30 and 50 percent, therefore install dehumidifiers to maintain that range.

Air circulation can be improved by opening a window or garage door for a few hours daily, especially during the warmer summer months. Preventing mold growth requires a steady supply of clean air.

5. Build your garage wisely

If you’re having a new garage built, you can start with a clean slate and make sure it stays mold-free. Avoid using wood or paper and instead opt for mold-resistant metal studs. Although it could set you back a few extra pennies at first, the investment will pay off handsomely in the end.

Pre-coated aluminum or vinyl siding is an excellent choice for garage walls since it repels water and prevents the spread of mold.

6. Reduce plant growth around your garage

To prevent overgrowth, prune any bushes or plants that have found a home near the exterior walls of your garage. Despite their verdant appearance, these plants are really a major contributor to leaks and water damage in garages. Additionally, plants and shrubs soak up moisture that gathers around your garage walls.

Bonus tips to help you master mold prevention in the garage:

  • A good way to keep the garage dry is to keep a container of silica gel, activated alumina, anhydrous calcium sulfate, or molecular sieves in there.
  • Garage foundation dampness can be avoided if gutter downspouts are directed a minimum of 6 to 10 feet away from the structure.
  • Don’t ever keep anything wooden in the garage that got wet. This includes clothing, shoes, and boxes. Mold could use any or all of these substances as food.

How to get rid of mold in garage?

These suggestions are straightforward to implement, won’t break the bank, and will benefit households much. Schedule a professional mold inspection from a reputable firm in your region if you want to adopt a more effective method of preventing mold in your garage.

Ottawa’s premier environmental inspection and cleanup service is Mold Busters. If your garage in Ontario or Quebec has been damaged by water, you can rely on our quick, thorough, and reasonably priced mold removal and flood restoration services.

Tips For Preventing Mold In Your Garage

  • See whether there are any water leaks in your garage. You should check the roof, the floor, the gutters, and the pipes in your garage to make sure they are in good working order. Do not delay in repairing any holes or fissures you may find.
  • Garage doors need to be insulated and sealed. Sealing and insulating your garage door is crucial for protecting your garage from the elements. Repair or replace any weatherstripping that is worn, ripped, or falling apart. In addition, make sure the bottom seal is not damaged in terms of elasticity, shrinkage, or wear. A pre-insulated garage door panel provides superior insulation because of its high R-value (the measure of how well an object resists conductive flow of heat).
  • Reducing humidity is a good idea. Since garages are often left open to the weather, they may be subject to high humidity (over 50%) ideal for mold growth. Reduce dampness by opening windows and using fans to circulate air, and by letting in sunlight for at least a few hours everyday. Dehumidifiers can also be helpful in reducing humidity.
  • Put up some watertight walls. Choose mold-resistant drywall and waterproof paint for the walls and concrete floor of your garage, whether you’re starting from scratch or renovating an old one. Use pre-coated aluminum or vinyl siding instead, which is more resistant against moisture and mold.
  • Distil standing water. Water pooling in garages can result from a number of different causes, including rain, snow, or even car washing. To avoid mold growth, quickly dry the surface after removing any standing water with a squeegee or mop.
  • Drainage should be adequate. Water damage and floods in the garage can be prevented with a proper garage floor drainage system. In addition to a suitable floor slope, drainage should be installed in your garage to prevent water from pooling there.
  • Downspouts from gutters should be lengthened. When it comes to keeping rainwater away from your house and garage, nothing beats a good system of gutters and downspouts. Make sure your downspouts stretch at least 10 feet away from the garage’s foundation to avoid pooling water there. Also, make sure the gutters are regularly cleaned and maintained.
  • Make sure to utilize storage containers that are watertight. Cardboard, paper, drywall, and other porous materials are magnets for water and, by extension, mold. Instead of using cardboard boxes to store your belongings, switch to plastic totes that can withstand the elements in the garage. Plastic is more durable than other materials, and it does not support mold growth.
  • Chop down any vegetation that may have taken root around your carport. Despite their aesthetic value, shrubs and plants can also lead to leaks in your garage by absorbing excess moisture. As such, make sure they are far from the glass in your garage and the walls.

How Much Does Professional Mold Removal Cost?

If you discover mold in your house, you should act immediately. As time passes, the expense of repairs and cleanup may skyrocket. Costs for expert mold removal typically range from $600 to $12,000, but can easily exceed $100,000 for really extensive infestations.

Everything you need to know about mold inspection and removal services is below.

Hire a Mold Inspector First

Especially if the moldy area is more than 10 square feet in size, and is growing on drywall, trim, or unfinished wood surfaces, you should engage a mold investigator to find out how widespread the problem is. They can also recommend a reputable mold removal service. Trustworthy businesses have external inspections done instead of conducting their own.

However, before hiring an inspector, make sure to verify their credentials. Although there is no oversight in the mold industry, there are some things you should look for to ensure you’re working with a legit company:

  • Inspectors should have a bachelor’s degree (or above) in a science or engineering field and should be certified by either the American Board of Industrial Hygiene or the American Council for Accredited Certification as mold specialists (formerly the American Indoor Air Quality Council).
  • They should have certifications recognized in the business, such as Certified Industrial Hygienist or Certified Industrial Environmentalist (Council-certified Indoor Environmental Consultant).
  • They shouldn’t offer mold-related products and should operate independently of a mold cleanup firm (because credible remediation businesses use third-party inspectors).
  • The results of any air or surface samples taken in the lab should be included in the tailored report they produce.
  • Some molds are more harmful than others, but that shouldn’t be emphasized.
  • In the event of a mold problem, they should advise you on whether or not you can handle it on your own, or if you should seek the services of a professional.

A site visit from a professional inspector will take 2–5 hours and cost $200–$600. Air samples will be taken, and the inspector may even open up walls to look for mold.

Ins and Outs of Air Sampling

Pricing for air sample analysis ranges from $30 to $150 per sample, depending on the laboratory. When calculating their rates, some inspectors include the cost of a sample, while others do not. That’s why it’s imperative that you inquire.

Not all mold problems call for a sample to be taken. If mold is visible, further sampling is only necessary if you need to determine the exact species for health or legal reasons. However, samples can verify mold presence if visual inspection fails. Additionally, sampling is commonly performed to confirm success after cleanup is complete.

Inquire as to the hypotheses being tested and the reasoning for the sample collection being performed by inspectors.

A mold inspector can help you figure out what to do, what gear to use, and how to do it if the cleanup is easy enough to do yourself. The inspector’s report should include detail the source of the moisture that encouraged mold growth.

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Do not attempt to diagnose mold concerns in your home using a DIY testing kit. As a result, they are useless. They will likely find mold, but that’s only because spores are continuously floating about. That’s the problem with these sets:

  • Provide a sufficient amount of air for statistical analysis.
  • The existence of mold spores that have died must be verified (which also cause health problems).
  • Establish an initial mold count to use as a comparison point for future testing.

What A Mold Remediation Professional Will Do

When the cleanup involves only washing and removing carpet, mold removal services can be done in a few days. When demolition and reconstruction are necessary, the process can take a few weeks.

In most cases, these steps are included in the cleaning procedure:

  • Getting rid of moldy, waterlogged stuff.
  • The process of washing and disinfecting furniture, walls, and clothing.
  • If mold damage is serious, the drywall and studs must be removed.
  • High-efficiency particulate air (HEPA) filtration vacuuming.

If the mold problem is significant and you have a sensitivity to it, you may need to find another somewhere to stay while it is being cleaned up.

Costs to remove mold depend on factors such as its quantity and location. It is estimated that:

  • To eliminate mold from crawlspaces, expect to pay between $500 and $4,000.
  • Budget between $2,000 and $6,000 to get rid of mold in your home’s ventilation system, basement, walls, and attic.
  • In the range of $10,000 to $30,000 (or more), if the damage is extensive.

In his experience as a mold investigator in Wisconsin, Wane A. Baker has concluded that “kill, kill, kill” isn’t the answer to mold treatment. In other words, mold can cause allergic reactions even after it has died.

Protecting Your Garage Door From Mold and Mildew

It’s important to safeguard your garage door investment from the weather if you want to get the most years out of your new door or keep your existing door in fantastic shape.

Closed, damp places like basements and garages are ideal breeding grounds for mold and mildew. Toxic substances and allergens may accumulate in your garage if you don’t keep it clean. If mold and mildew aren’t eliminated, they might cause degradation and discoloration.

If you want to keep your garage and the area around the door mold- and mildew-free, give these suggestions a try.

Inspect Your Garage and Door Regularly

The growth of mildew and mold can be prevented if you inspect your garage and door on a regular basis for signs of wear and tear. Water can be trapped if the garage door isn’t sealed properly, which can then lead to mold or mildew growth.

Puddles and a rise in relative humidity can be the result of structural issues with the garage, such as leaks or cracks. If you don’t want water to pool near your garage or front door, extend your gutter downspouts at least six feet away from the building’s base.

Call Door Tech in Gambrills, Maryland, for a free estimate if you need help repairing cracks, leaks, or broken seals.

Improve Ventilation

Excessive moisture from a damp garage is a breeding ground for mold and mildew. Condensation on your walls or windows indicates an issue with airflow.

Moisture may be removed from the garage and the door won’t rust if you open the windows or run the exhaust fan. To extract moisture, you can also utilize chemical moisture absorbers like silica gel or activated alumina. The more outside air you can bring into the garage, the better.

We Marylanders know all too well that garages are susceptible to moisture because of the constant presence of humidity. A dehumidifier can help you maintain a humidity level in your garage between 30 and 50 percent.

Be Conscious of Building Materials

Because they absorb moisture from the air, paper and wood are not a good choice for a garage. Rather than using drywall in a garage, you should use metal studs and pre-coated aluminum or vinyl siding to prevent the growth of mold and mildew.

Even while it may be more expensive initially, you won’t have to worry about dealing with mold or mildew later on.

Have a Good Drainage System

If you live in Maryland, water or snow will ultimately find its way into your garage. Water can sometimes be avoided by making sure your garage has a good drainage system and a sufficiently sloping floor. Because of this, your garage will be much less likely to become a breeding ground for mold and mildew.

Clean Your Garage and Door

Mold and mildew in your garage? Fill a spray bottle with bleach or vinegar and give it a good spritzing. Keep the garage door open and spray the windows. If the odor is extremely strong, you may wish to protect your lungs by using a mask. Just let the cleanser sit for a few hours, then scrub and rinse.

Using a power washer, thoroughly clean the interior and outside of your garage door if mold growth is detected. After giving it a good washing with some soap and warm water, you should let it dry before you shut the garage door. Vinegar can also be used, although bleach will damage the door’s finish if you use too much of it. Make sure there is no further mold or mildew accumulation on the garage door by inspecting it frequently.

Open up a box of baking soda and put it in the garage if there’s a musty or disagreeable stench. Spray the garage with a solution made from equal parts vinegar and water.

The garage door requires maintenance just like any other part of your house. Call Door Tech and we’ll come out and give you an estimate for repair or replacement if your door is beyond cleaning and you’re considering replacing it.


How do you remove mold from a garage door?

There is an art to successfully removing mold from any surface. Assuming it’s not too extensive, the homeowner can take precautions to prevent the mold from spreading. Wear protective gear, including a face mask, gloves, and goggles, before beginning. To clean, use white vinegar in a spray bottle. Spray the damaged areas gently until all the mold is saturated. However, vinegar’s high quantities of citric acid are lethal to mold spores since they require moisture to thrive and proliferate. To remove mold from a garage door, soak a cloth in vinegar for an hour, then wipe the door down, working in small sections. After using warm water to clean the door, the soiled cloth is thrown away and the bag is sealed. After a few hours, the vinegar odor should fade. To ensure the safety of your home and family, call Mold Busters for an inspection and removal if there is visible mold.

How to get rid of the musty mold smell inside the garage?

The standard mold odor in your garage can be eliminated by eliminating the mold growth that causes it. If you discover mold growth inside your home, it is imperative that you have a remediation expert take care of the problem right once. Experts from Mold Busters will finish the job properly. Once that’s taken care of, a garage’s unpleasant odor can be eliminated with the help of a dehumidifier and the right temperature.

Can mold from a garage spread to the house?

With the right conditions, mold can grow in an attached garage and then spread throughout the house via clothing, household goods carried in from the garage, and even air currents, due to the microscopic size and light weight of mold spores. When someone disturbs the air around a mold colony, the spores can spread far and wide. If you discover mold in your garage, call Mold Busters immediately to prevent the fungus from spreading through your house.

Do I need mold-resistant drywall inside my garage?

Using mold-resistant drywall in high moisture locations like garages or bathrooms is a wonderful strategy to limit the danger of mold growth inside of a home or garage during construction or renovation. Mold growth on the walls and ceilings will be reduced as a result of this. The best strategy to prevent mold growth within the garage is to maintain stable temperature, relative humidity, and air flow. In order to maintain a healthy and safe environment for your family at home, even a basic understanding of mold and how it forms is essential.

How much is a professional mold removal inside a garage?

This is a challenging issue to address because each case study is unique. The garage’s type, the amount of mold, and how long it takes to clean out all play major roles. If you want an accurate answer to this issue, you should schedule an appointment with a local Mold Busters expert to have a comprehensive examination performed and an estimate provided. The estimated cost to fix the damage is now known.

Helen Skeates

Helen Skeates

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