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Old 01-12-2019, 02:49 PM   #1
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How to kill mold


I recently had a leaking on my roof that has been fixed. I am in the process of replacing the drywall and insulation. After taking out the old drywall and insulation I see a couple area with green mold.

Can I use white vinegar and baking soda with spray bottle to kill the mold?

Can I also use this?

Rust-Oleum 276087 Mold Killing Primer Quart https://www.amazon.com/dp/B00K7FEQPI..._qkLoCbH0XV03Y


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Old 01-12-2019, 03:47 PM   #2
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Re: How to kill mold


While you can certainly use the primer, I recommend you clean the area first regardless.

Pre-clean the surfaces of any visible material.

Make a solution of 3/4 cup bleach per gallon of warm water in a bucket.

Wearing safety glasses and rubber gloves, apply to the affected area with a sponge or brush.

Allow it to sit in contact with the mildew for 5 minutes, then rinse with warm water. Allow to air dry thoroughly .

You may need another application if the problem is severe.

Be sure to ventilate the area as much as possible to promote drying and evacuate fumes.

In all probability, some of the solution will drip on you so make sure the clothes you wear are either white or ones you do not care if they get stained.

You can also use a pre-made mold and mildew cleaner found in the bathroom cleaning products section of your local supermarket.
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Old 01-12-2019, 03:49 PM   #3
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Re: How to kill mold


Concrobium. Wal-Mart and all the big box stores carry it.
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Old 01-12-2019, 03:53 PM   #4
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Re: How to kill mold


Home depot has a video on killing and clean mold.


https://www.homedepot.com/c/ah/how-t...5fab907c52351c


Once the moisture is gone the mold goes dormant. Engineers are always more worried about rot that needs much less moisture to survive, they always want the stained areas coated with the end cut treatment for treated lumber, It paints like water.
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Old 01-12-2019, 04:39 PM   #5
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Re: How to kill mold


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Concrobium. Wal-Mart and all the big box stores carry it.


Lol I was just at Home Depot and picked this up. I will use it tomorrow. Thanks


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Old 01-12-2019, 04:50 PM   #6
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Re: How to kill mold


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Originally Posted by Drachenfire View Post
While you can certainly use the primer, I recommend you clean the area first regardless.

Pre-clean the surfaces of any visible material.

Make a solution of 3/4 cup bleach per gallon of warm water in a bucket.

Wearing safety glasses and rubber gloves, apply to the affected area with a sponge or brush.

Allow it to sit in contact with the mildew for 5 minutes, then rinse with warm water. Allow to air dry thoroughly .

You may need another application if the problem is severe.

Be sure to ventilate the area as much as possible to promote drying and evacuate fumes.

In all probability, some of the solution will drip on you so make sure the clothes you wear are either white or ones you do not care if they get stained.

You can also use a pre-made mold and mildew cleaner found in the bathroom cleaning products section of your local supermarket.


I got the mold control from Home Depot. Will give that a try tomorrow and see how it works.


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Old 01-12-2019, 05:25 PM   #7
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Re: How to kill mold


My only objection to the Concrobium is that it doesn't change the appearance where you are cleaning, at least didn't for me. I went back to the bleach approach as Df described and the stain faded away. The irony is, mold is everywhere all of the time just waiting for some moisture to get it going. Since you have the Concrobium it will do just fine as it will kill what is there.

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Old 01-13-2019, 08:03 AM   #8
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Re: How to kill mold


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I got the mold control from Home Depot. Will give that a try tomorrow and see how it works.


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Old 01-13-2019, 02:08 PM   #9
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Re: How to kill mold





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Old 01-13-2019, 02:09 PM   #10
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Old 01-13-2019, 02:11 PM   #11
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Re: How to kill mold


After a couple of sprays





Looks goods I will wait until fully dry tomorrow and spray a few more then paint it with that mold primer


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Old 01-13-2019, 04:09 PM   #12
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Re: How to kill mold


Is there any airflow for ventilation above that insulation. Needs inlet (low) and exhaust (high) and a couple of inches of space above the insulation (minimum 1").

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Old 01-13-2019, 05:16 PM   #13
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Re: How to kill mold


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Is there any airflow for ventilation above that insulation. Needs inlet (low) and exhaust (high) and a couple of inches of space above the insulation (minimum 1").

Bud


No thatís all there is. The insulation is not a very snug fit I say probably like 1/4 - 1/2Ē play on it.


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Old 01-13-2019, 07:17 PM   #14
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Re: How to kill mold


Your choice, but best practices and in some places a code requirement is to have a gap and ventilation. There are no recommendations for having air permeable insulation directly against a cold roof deck. I suspect some of the discoloration we are seeing is moisture damage from condensation.

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Old 01-13-2019, 07:22 PM   #15
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Re: How to kill mold


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Your choice, but best practices and in some places a code requirement is to have a gap and ventilation. There are no recommendations for having air permeable insulation directly against a cold roof deck. I suspect some of the discoloration we are seeing is moisture damage from condensation.

Bud


Thatís from a leaking roof.


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