Cleaning Mold With Bleach and Ammonia

My husband and I have purchased a house that was condemned and are working on getting it back up in running condition. I am horribly allergic to mold and dust so, I cleaned the basement from top to bottom with ammonia to kill any mold that might be lurking under the surface. It worked but, now being an older basement its starting to smell of mold/mildew/damp (inevitable I guess), but I was wondering how long I need to wait before I can clean the floors with bleach? I'm very nervous about the 2 cleaning agents mixing, but I have to get the smell out (and what's causing the smell). It has been close to a year since the ammonia cleaning.


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May 26, 20160 found this helpful
Best Answer

The warning about not mixing bleach and ammonia essentially refers to not mixing the two together at one time. If a year has passed since cleaning with ammonia, you should not have a problem using bleach now.

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June 23, 20160 found this helpful

Never ever mix bleach with ammonia! It's lethal.

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June 23, 20170 found this helpful

My mom got literally knocked out by the fumes from combining bleach and ammonia

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August 18, 20160 found this helpful

Ammonia is not good for killing mold. It can easily resurface in the same areas. Mold needs to be cleaned professionally if widespread. Also the source, and reason behind the mold needs to be found and addressed otherwise it happens again.


Half masks, cotton mask, do not filter out spores. Some mold (stachy) is a serious respiratory concern. Other molds can actually infiltrate your lungs and incubate there. Consult a professional company for a free estimate and investigation. Mold damage is covered by HO insurance.

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August 14, 20170 found this helpful

Vinegar kills mould. I spray straight cheap white supermarket vinegar onto mould and leave it overnight or a few hours. Then next day I spray cheap supermarket bleach onto it to whiten it. No touch easy!

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August 26, 20170 found this helpful

Actually ammonia is the only thing that will kill mould, as it not only kills the spores but also the ability for the structure or dna of the mould to reproduce.All recurrent moulds are due to the fact that not all spores , in the air were killed too. To kill mould a property must be treated,as have all the items going in , in order to completely irradicate it.

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November 17, 20160 found this helpful

Try running a dehumidifier.

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July 25, 20170 found this helpful

Tea Olive essential oil works to prevent mold and mildew.

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August 26, 20170 found this helpful

Bleach will kill the mold but ammonia and bleach are toxic. Make sure the room is very well ventilated and use fans

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