What Are The Signs of Attic Mold? and How To Clean the Mold Issue Yourself?

Helen Skeates
Helen Skeates
9 min read

Mold can grow anywhere there is moisture, but the attic is the primary breeding ground for it, thus you will most likely need to learn how to get rid of mold in attic. Due to roof leaks and ventilation issues, this area is considered the most vulnerable to mold.

Despite its location at the very top of the home, mold can still have an impact on the quality of the indoor air. Getting rid of mold should be your number one priority, even if it means putting your health at risk.


When it comes to mold, if there is a moisture problem, there is certainly a mold problem. Mold can grow on plywood in your attic if there is a lot of moisture in your attic.

Poor ventilation, air leaks, and roof leaks are common causes of this problem.

Removing Attic Mold – Moldman


Passive ventilation is common in attics, where air enters through soffit vents and exits through ridge or can vents on the roof’s eaves.

When one of these mechanisms is inhibited, the entire system is thrown into disarray. In the attic, warm air accumulates and condenses on the cold wood sheathings. As a result, mold is likely to form.


Exhaust fans or the wind can blow through ceilings and attic floors if a home has a poor seal. Large-scale air leaks can generate condensation, which can lead to mold growth on your attic plywood due to the water vapor in the air.


There are some spots in your attic where mold can grow due to roof leaks. Check the wood and roof valleys for any discolouration. Most roof leaks occur at the intersection of two incompatible materials, such as a chimney or a vent.

How to know if you have an attic mold problem

This “attic mold panic” scenario may all be avoided if you rapidly examine your attic for mold every year and take care of it immediately if you uncover a problem.

An attic mold infestation might be detected by looking for these telltale indications.

  • If the wood in your attic displays any black discoloration, the situation has gone beyond moisture; you have mold that needs to be removed.’
  • If the attic isn’t properly vented, it feels hot and suffocating. A stifled attic suggests a ventilation issue, which can lead to mold growth.
  • Roof sheathing is prone to frost development during winter months. Ice can build up on the underside of your roof if your attic isn’t properly ventilated. The fact that it stands out like this is a huge plus.
  • Having moist insulation in the attic is a red flag that you may have a mold problem, as well as a hint that your home’s ability to heat and cool itself may be greatly reduced.
  • You may be sure that the floor (or attic) above you has a moisture problem if water drips from smoke alarms, light fixtures, and bath fans.
  • In the attic, the stench of mildew should guide you. This indicates that there is some kind of moisture problem in the attic.

What Are The Signs of Attic Mold?

There are obvious indicators of mold in the attic if you frequently inspect it. This is critical so that you don’t waste your time wiping away the wrong sand or grime.

Mold In Attic: Causes & How To Remove It - Waypoint Inspection


Attic plywood discolouration is one of them. This is a sign that the mold has progressed past the stage of saturation with moisture. Wooden surfaces frequently show this as a dark stain.

Earthy smell

In addition, mold and mildew are often recognized by their musty and earthy odors. It smells a lot like a dying plant, and anyone with a keen sense of smell will immediately notice it.

Subtle signs

Indirect symptoms include things like a warm attic or ice buildup on the roof. Mold growth in your attic can be detected by the first of these two symptoms: a musty odor. Ventilation problems can also cause water vapor to freeze under your roof, resulting in ice dams.

Black mold

If you want to protect your health, you’ll need to learn how to recognize black mold, which is commonly thought of as a health risk. Mold growth is no stroll in the park, and you must exercise caution when attempting to prevent it.

Can you remove attic mold yourself?

Before anything else, you need to know the difference between mold removal that you can do yourself, and mold contamination that only mold removal experts can handle. It’s fine to proceed with the cleanup if the mold covers less than 10 square feet of your attic floor. If this is the case, you’re better off calling in a professional.

Wearing protective gear, such as gloves, goggles, and N-95 masks or respirators, is especially vital when dealing with large amounts of mold. A respiratory condition can be especially problematic in this case.

How Do You Treat Attic Mold?

Use a wet vacuum with some water in the tank if mold appears on wooden surfaces. This is the amount of water you should use to keep mold at bay.

Afterwards, use a piece of old cloth and clean water or wood cleaner to clean the surface. Wet sponges can also be used.

After using the vacuum, you can clean the surface using one of these. Once you’ve finished, let the surface air dry fully. Using your preferred vacuum cleaner, remove the contents and place them in a tightly sealed plastic bag for later disposal in ordinary rubbish.

The evident mold buildups can now be dealt with before moving on to the molds that are hidden from view. It’s possible to get a solution for this in your local supermarket. Fortunately, there are a number of mold removal treatments available that can remove even the toughest mold stains.

How to Clean the Mold Issue Yourself

For mold removal, the Environmental Protection Agency recommends a 3×3-foot area of your home, which is approximately 10 square feet. Wearing gloves, goggles, a N95 face mask, and long-sleeve shirts and pants is essential, but it’s not enough.

Vinegar and Water Can Get Rid of Mold in the Attic

A solution of 1/2 cup vinegar and 1 gallon of water, along with a sponge, can be used to remove mold from wood sheathing. While it won’t remove the stain, it will kill the mold.

Even if you accomplish this, you still have to track down the problem’s origin to prevent it from recurring again.

Alcohol Can Get Rid of Mold in the Attic

Mold can be killed by cheap alcohol, such as distilled ethanol. Due to its low aroma and antibacterial properties (which kill microbes), vodka is probably the best choice. Bleach, on the other hand, is far worse for your lungs.

If it’s a vast space, high humidity could cause condensation. Finding out why the attic is so humid is critical. Is there any air coming out of my mouth? Is it escaping and producing a problem with condensation inside?

When to Call in a Professional to Get Rid of Mold in the Attic

Did you replace the roofing, seal the skylights, and look for leaks in the plumbing? Yes? Great! Make sure the insulation isn’t drooping. A specialist should be called in if the mold is still there.

Mold can grow in heated air ducts if it comes into contact with any moisture. Need assistance locating the source? Are you hesitant to perform the necessary repairs on your own? Talk to an expert.

It may be too much for one person to handle a space greater than 10 square feet. Check it out and get help from an expert. For mold cleanup, now may be the time.

Dry ice can also be used to remove mold. Dry ice is used to blast the mold out of the attic, and a HEPA filter is used to remove it from the attic. An expert’s assistance is highly recommended at this point.


This tutorial on how to get rid of mold in the attic will help you avoid any potential disasters. When it comes to your health and home renovation, mold may be a real threat if it isn’t dealt with quickly.

To make your mold cleanup a lot easier, take this guide and make sure you haven’t missed anything. Wishing you a mold-free and energy-efficient attic!

Helen Skeates

Helen Skeates

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