Saturday, May 25, 2024

How To Remove Black Mold From Attic

Tips For Cleaning Mold

How to Clean Up Attic Mold | This Old House
  • Remember that your goal is not to kill the mold spores, but to remove them. When they have been removed completely they cannot grow back.
  • Ventilate, ventilate, ventilate! Ventilation is important during cleaning, so that any disturbed spores exit the building. Close and tape off doors to the rest of the house and use a box fan in a window pointing out while cleaning. This will prevent spores from invading the rest of the home, and remove them from the air of the room to be cleaned.
  • Be sure to spray and then wipe all surfaces with a damp rag. Dry wiping will disturb spores and send them into the air! Airborne spores can regrow in new locations, and cause even more mold to grow. Mold spores are not visible to the naked eye, so be sure to cover all surfaces with your cleaner of choice, even if they look clean.
  • Do NOT use a vacuum to clean mold unless you have a vacuum with a HEPA filter. HEPA stands for high-efficiency particulate air, which means the filter can stop most particles of dust, pet dander, allergens, etc. that are 0.3 microns or larger and keep them from being put back into the air. The HEPA filter should be changed periodically to increase efficiency. Use with caution as mycotoxins may not be filtered out even when using a HEPA vacuum. Remember that you will eventually have to empty the vacuum, and it will be filled with the mold. Vacuuming is not the best method of removal.

Is Mold In Attic Common

Yes, attic mold is common because it can be found in any property, old or new. The condition for the growth of mold is abnormal moisture levels in the attic. Although attic mold can be found in all homes, research has shown that older homes are at a higher risk of attic mold infestation. This is because they often have faulty insulation that allows moisture to penetrate, thus creating suitable conditions for mold growth. The most common type of mold that grows in attics is Penicillium and Aspergillus.

Get Your Cleaning Solution Ready

We always recommend using safe/organic items such as vinegar and baking soda.

To prepare: Mix white distilled white vinegar and water at a 50/50 ratio into a spray bottle this alone is a great mold killer, but for extra power, add a teaspoon of baking soda and shake it up well.

You can also use 3% hydrogen peroxide or borax if you do not have any vinegar and baking soda available.

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How To Remove Mold In Attic

  • Step 1: Fixing the source of moisture into your attic.This will ensure that you prevent the growth of mold. Not addressing the source of moisture can cause regrowth of mold in your attic.
  • Step 2: Remove the items in your attic.If you use your loft for storage, ensure that you remove all the items stored and disinfect them with vinegar to kill all the mold spores. Do a general cleaning in your attic and identify the areas with mold growth.
  • Step 3: Spray with vinegar/bleach.You can use bleach or vinegar to clean the mold on your attic. When using vinegar, ensure that you use personal protective gear because it has a scorching effect on your body. When using bleach, be sure to mix it with warm water in a ratio of one cup of bleach to a gallon of lukewarm water.
  • Step 4: Do away with infected items.You should not return items that have mold into your attic without thoroughly cleaning them. This is because they might contain spores, which will cause a re-infestation.

What Are The Tell

How To Get Rid Of Mold In Attic Rafters
  • Dark black staining on wood surfaces If the wood in your attic shows any black discoloration, the problem has moved beyond moisture you have mold that should be removed.
  • Attic feels excessively hot or stuffy Attics should feel breezy if they are properly ventilated. When an attic is stuffy, that indicates you have a ventilation problem, which often results in mold problems.
  • Frost buildup on the underside of the roof sheathing in winter When its cold enough outside, water vapor in an attic with improper ventilation can freeze on the underside of your roof. This makes it especially easy to spot.
  • Wet insulation in the attic Not only is this a sign that you may have a mold problem, but when insulation gets damp or wet its ability to insulate becomes significantly diminished, costing you extra money to heat/cool your home.
  • Water dripping from smoke detectors, light fixtures, bath fans This is a sure sign that the floor above you has a level of moisture that needs to be addressed.
  • The smell of mildew in the attic Trust your nose. A musty or moldy smell in the attic means theres a moisture problem somewhere.

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An Additional Way Moisture Can Get Into Our Attics

A common occurrence in Florida is having bathroom fans vent directly into the attic. In Florida, this is usually fine because the attics are well ventilated and the attics are already super humid throughout the year.

On the other hand, if you were to do that up north the humid air would instantly combine with cool air in the attic and begin to dew causing mold/staining.

So, check your bathroom fan vents to see where they are venting to. If you are up north, they should be venting to the exterior.

Is Mold On Your Ductwork a Problem?

Well, in many cases not really.

HVAC technicians may try to sell you on new ductwork, but in southern climates near the beach, mold being on the outside of the ductwork may not be a big deal.

As long as moisture is not sweating too much to cause puddles of water, staining, and damaged materials!

For more information on the science behind dew points and condensation read here.

I Found My Dream Home And It Has Attic Mold Now What Dont Panic

Whether youre buying or selling a home in the Pacific Northwest, mold is a fact of life. Mold spores are floating in the air all around us. They dont grow until they can attach themselves to a moist surface. Attic mold tends to go undetected because the attics not a place a homeowner spends much time hanging around in so when attic mold turns up on a home inspection, its often a surprise to both buyer and seller.

If you find mold in the attic, first, take a breath. Mold in these areas isnt a significant factor in indoor air quality, and truthfully, most molds are relatively harmless to humans. Visible mold is ready to be remedied and doesnt require costly testing. What you dont want to do is leave mold untreated, because the materials the mold has attached to can cause issues with timber and framing integrity. In the attic, mold can degrade drywall, spread to the ceiling below, and even cause problems with your roofs life expectancy.

Causes of attic mold

Mold can also grow in the attic when a home has been built during Oregons wet months. If interior wood framing and plywood had not been sufficiently dried before adding drywall and roofing material, moisture could be trapped inside.

Other factors that can contribute to attic mold are improperly vented combustion appliances like the stove or dryer improperly venting kitchen or bathroom fans improperly installed rain gutters or a leaking roof.

Eradicating mold for good is a two-part process

First, clean it up

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Tips For Mold Prevention

After you learn how to remove mold, focus on preventing it in the future. Controlling dampness is the key to stopping most mold. The worst infestations usually occur in damp crawl spaces, attics, walls where water leaked in from the outside, and in basements with poor foundation drainage. Stopping leaks, ensuring good ventilation in attics, keeping crawl spaces dry and routing water away from the foundation are the best defenses against mold.

Mildewcide in paint is usually effective for controlling surface mold in damp rooms like bathrooms, and outside in shady areas. Many paints already have mildewcide in them. Check with your paint dealer about mold removal products.

Contact Us For Attic Mold Removal

Getting Rid Of Attic Mold Stains When The Sale Of Your Home Depends On It Lisle, IL

When a mold infestation seizes your residential or business property, consult a reputable mold remediation company, such as ServiceMaster Disaster Restoration and Recovery. Our experienced technicians will promptly arrive on site, assess the extent of mold growth, and prepare an effective mold remediation plan.

Our skilled mold specialists utilize advanced equipment to detect hidden mold growth. Spores can flourish in concealed areas, like behind the walls. Using an InstaScope mold detection instrument, ServiceMaster DRR crews are able to determine airborne mold levels inside the home or commercial space.

ServiceMaster DRR will return your property to safe and habitable conditions. We are able to handle both small jobs and larger ones. Mold growth should be addressed as soon as possible to prevent long-term structural damage to the property.

Residential homeowners and business owners in San Francisco and the Bay Area, California rely on ServiceMaster DRR for professional mold remediation services.

Our mold cleanup crews are available to respond to emergency mold disasters 24 hours a day, 365 days a year. Call us at

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How To Get Rid Of Mold In The Attic

There are a few things that should be taken into account before we get to the step-by-step instructions.

Firstly, how widespread is your attic mold problem? If its in relatively small quantities, then taking the DIY approach is perfectly fine. If the infestation is large, on the other hand, then you may want to seriously consider hiring a professional to take care of it.

Secondly, safety is of paramount importance. The attic could be infested with mold spores, and even if it isnt, it could be once you disturb the mold. That is why you will need some essential safety gear. Using a respirator mask, safety goggles, and gloves is strongly recommended. Also, wear old clothes that you can discard afterward because the spores tend to stick to clothing.

Common Places Attic Mold Is Often Found

Attic mold is usually found in green, black, brown, or white colors. It might appear as a stain or slight discoloration on wood or drywall. It can be in small splotches or larger spots. Sometimes attic mold appears to be a light powdery coating. If the surfaces in your attic are worn, mold will grow there especially.

Other areas in the attic which attract attic mold include areas which are very damp and those areas which are poorly ventilated. If you attic has a single, small window which only lets natural light into one side of the attic, the other side will be prone to darkness and dampness and if moisture is caught here, it will not be dried. The walls and the ceiling of your attic are the most prominent places for attic mold to be found.

There are some types of attic mold which are harmless but others which pose severe health risks. Some allergenic molds will cause respiratory infections or irritations to the sinuses if they are inhaled.

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Making A Mold Removal Spray

According to,, to make a mold removal spray, mix half white vinegar and half water in a spray bottle and spray down the mold colony. Tea tree oil and white vinegar are both completely natural and safe for wood and have strong fungicidal properties.For larger mold jobs, vinegar and tea tree oil may not be strong enough.

You can also try hydrogen peroxide, which is a strong but safe and natural alternative. Mix 1 part peroxide with 2 parts water and spray it on the moldy area, letting it dry for an hour. Scrub the area with a firm wire brush and allow it to dry one last time. Remove the plastic sheeting and repair any leaks to prevent new mold spores from emerging in the future. If your attempts at attic mold removal still don’t work, contact a mold remediator for further advice, as some mold infestations are so large, they are better handled by a professional.

Things You Will Need

How Do You Remove Black Mold From Plywood In Attic

Black Mold Removal How To Remove Toxic Attic Mold


Similarly, you may ask, how do you remove black mold from plywood?

Treat exposed molded subflooring with a mixture of 1 cup of borax and 1 gallon of water or an EPA-registered mold removal product. Spray the solution on the moldy plywood. You can also soak affected subflooring with a brush broom. Wait 10 minutes, scrub the area, and repeat the process two more times.

Secondly, how much does it cost to get rid of mold in attic? Attic Mold Removal CostAttic mold treatment costs $1,500 to $3,500 on average and can go as high as $6,000 to $10,000 if the leak is large or has gone undetected for a long time.

Hereof, why is the plywood in my attic turning black?

When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood.

What do professionals use to kill mold?

Scrub the surface mold stains from walls and wood trim with a mixture of 1 qt. water and 1/2 cup bleach mold cleaner to kill the mold. Use a soft brush and work until signs of the mold disappear. After scrubbing the surfaces, simply allow the bleach solution to continue to penetrate the surfaces and dry.

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Is Attic Mold Removal A Diy Job

The attic is a dangerous part of the home, simply because one wrong step can send a homeowner through the floor joists and lead to injury. Falling through the ceiling is just one hazard. Homeowners can hit their heads on rafters, step on nails or encounter nesting animals.

The stuffiness of the attic space can cause breathing issues. Respiration is worsened when mold spores pollute the air. Homeowners who attempt to clean attic mold from the plywood should be prepared to set up temporary flooring, contain the mold spores and set up negative air pressure.

Physically fit homeowners can attempt to clean the mold from attic plywood on their own. But adequate preparation for such a hazardous job is necessary. Be aware that incorrectly performing the task can lead to serious injury to the homeowner or family.

How To Prevent And Remove Mold From Attics

How to prevent and Remove Mold from Attic?

How often should you check your attic? Is your attic free of molds? How bad is mold in attic? How can you treat mold in attic?

Often neglected yet one of the important spaces of your home is attic. Do you check the walls and floors, the sides and corners of your attic quite often? If the answer is no, your attic needs a thorough check. Neglected attics have more chances of mold infestation. Molds may look like a petty problem that could be rinsed off with one splash. But it is beyond your imagination. The extent of which is even asthma, memory loss, anxiety and depression under long-term effects. First off, you need to know what mold is and what problems can it can lead to.

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White Mold In The Attic

White mold in the attic is just as common as black mold. Although the white varieties can be any number of species, the good news is that its usually easier to remove than say, black or green mold.

Its also important to know that most species start white during its beginning stages before turning green, yellow, or black.

How To Remove Attic Mold By Power Sanding

Black Attic Mold Stain Removal Downers Grove, IL

One such method is power sanding and wire brushing. This technique works well in smaller areas where the mold has not penetrated into the underlying material.

And, if the mold growth is in difficult to reach areas such as in joints, then dry ice blasting is a useful method. Just make to sure to gear up safely with the appropriate mold removing PPE or personal protection equipment before diving in).

The equipment for this technique can be very costly in time and money. And, it may even be prohibitive to the best of you DIYers. It is useful to keep in mind that getting rid of mold in your home, may very well be worth the cost of hiring a professional.

Other blasting methods use various media to remove mold from attic surfaces including sand, soda, corn cob, dry ice and walnut shell.

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How Mold Gets In Your Attic In Southern Climates

In southern climates, especially near beaches where there is high humidity, we actually get mold in our attics quite frequently.

In Florida it is actually common to have mold on the outside on of your ductwork.

This is because the humidity is so high, it can reach cool points in the attic and condensate.

How Much Does Mold Removal Typically Cost

Typical mold remediationcan costmoldcanremediationmold is

. Thereof, how much does mold removal cost for an entire house?

$500 to $4,000 to remove mold from crawlspaces only. $2,000 to $6,000 to remove mold from ducts, crawl spaces, walls, and attics. $10,000 to $30,000 to repair widespread structural damage.

Also, how much does it cost to check for mold? Residential mold testing can range from $250 to $300 on average, while commercial mold testing can start at $500. Testing isolated areas can cost less, but most experts recommend more thorough testing.

Keeping this in consideration, how much does black mold removal cost?

The black mold removal cost of an unfinished basement can really vary. It could be as little as $500 or as high as $4,000 depending on the scope and size AKA how much mold is present and how much area it covers. If the attic and ducts are involved, the cost for those generally ranges from $2,000 to $6,000.

Can I remove black mold myself?

Wear a respirator or a facemask rated for black mold spore protection, and cover arms, legs and hands to avoid contact with mold spores. Use soap and a sponge to remove visible mold. If the moldy area is dry, lightly spray with water, as this will reduce the incidence of airborne mold spores during cleaning.

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