How to Remove Mold from Attic Plywood

Mold can grow on attic plywood easily over time or with excess moisture in the attic. It can be difficult to get rid of it, but there are several methods that you can employ to do so.

You can go through the following steps to figure out how to remove mold from attic plywood.

Prepare the Attic

Firstly, it is necessary to prepare your attic well so that the mold removal process becomes much easier and more efficient. You should remove all the objects stored in the attic so that they do not accumulate mold or get in the way.

Close all the windows and seal any openings, if present. This will help prevent the mold from spreading any further. You can also uninstall the insulation in case you find that it is affected as well.

Wear protective equipment such as a mask, glasses and gloves to avoid coming into contact with the mold as it can cause several health issues for you.

Before you go ahead with the removal process, you can turn on a heater or dehumidifying machine in the attic to slow down the growth a bit.


As a starting point, you can use some detergent and a wet cloth to blot out and wipe the mold from the plywood. Make sure you take sufficient amounts of the detergent to help you out.

While this might not work for larger mold infestations, it can certainly be useful for loose and sparse mold in your attic. Once you have managed to get rid of as much mold as possible, you can wipe it again with a dry cloth and let it dry out completely.

This is also a good way of preventing the mold from spreading to other parts of the attic and house.

Baking Soda

Combining baking soda with some water and mixing it well together can be another way of getting rid of mold from your attic plywood. Once you prepare the mixture, pour it into a spray bottle and spray it onto the affected parts of the wood.

You can then make use of a brush or stiff cloth to wipe out the mold easily from the plywood as the solution would have broken it down to a certain extent. To dry it out completely, use a HEPA (high-efficiency particulate air) vacuum cleaner that can efficiently collect all the particles that might not be visible to you.


Preparing a vinegar solution is a good idea for removing mold as well. For this, you will need to mix some white vinegar with water in equal parts. Pour this into a spray bottle and spray the solution onto the mold on the attic plywood.

This should ideally loosen up the mold and make it easier to remove. Let the solution rest for a few minutes and then use a brush or rough cloth to wipe everything down. You can also use a vacuum to dry it all out even more.

While this might work for smaller amounts of mold, it might not be enough for larger instances.

Hydrogen Peroxide

Hydrogen peroxide is a stronger substance that can make it easier to remove the mold. Combine a bit of this substance with a larger amount of water and mix them well together. If you do not have hydrogen peroxide at home, you can simply buy it from a nearby store.

Pour this solution into a spray bottle and spray it over the mold on the plywood. In this case, you should let the solution rest for half an hour to an hour. This will allow it to successfully work itself through the mold, making it easier to remove using a brush or cloth.

Improve Ventilation

Once you have managed to get rid of most of the mold on the plywood, you can then take the necessary measures to improve the ventilation in your attic, as this can be a major cause of the mold in the first place.

Apart from enough windows, you should also have effective soffit vents and dormers in the attic. Installing an attic fan might also be a good idea in this case as it can exchange the hot and humid air with cooler air.

Improve Sealing

It is also necessary to enhance the sealing measures in your attic to remove and prevent mold from growing on your attic plywood.

This includes taking care of any gaps or cracks that may exist in parts of your attic or between the attic walls and connected rooms in the house, as these can be major sources of moisture and can also easily spread the mold from one part to another.

You should try to fix any leaks as soon as possible as well. In case you think your insulation system has been affected as well, you might need to replace it with a new one.

Call a Professional

While most of the steps mentioned here are ones that you can undertake on your own, it might be a better idea to call a professional to remove the mold for you, especially if the infestation is particularly large.

This can allow them to take safer measures to clean up the mold while also employing more advanced techniques such as sanding and blasting to thoroughly get rid of the mold.

You can also opt for this solution in case the others do not work out or if you do not feel confident enough to do so on your own. It might cost a bit more to employ a professional, but it can help you save on long-term costs.

Concluding Remarks

Through this guide, we have taken you through all the steps and methods involved in removing mold from your attic plywood. Alongside these, it is also important to improve ventilation and sealing. You can also simply opt for a professional to help you out.

In case you are carrying out these steps on your own, make sure you wear protective equipment at all times while also asking someone else to help you.