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In general, mold is not harmed by bleach enough for it to disappear. It is not recommended as the
sole treatment for mold as it will have to be applied and re-applied several times. The process is
time consuming and lengthy and you would be better off calling 911 Remediation and letting the
professionals take care of it in a ½ the time, with 3 times the effectiveness.
Here are some key reasons why chlorine bleach, although can reduce the appearance of mold, will not
kill it permanently:
  • LACKS STRENGTH TO PENETRATE CELL STRUCTURES: Chlorine bleach is not strong enough to mill mold, particularly on cellulose-rich, porous surfaces. The chemical structure of bleach contains cells that are too large to be absorbed by wood, dry wall and the like. Bleach therefore cannot penetrate where it needs to go. Mold grows into the surfaces of these materials, so at best bleach can only clean the top, while the mold continues to grow beneath the surface.
  • BLEACH ONLY WHITENS: Bleach doesn’t clean mold away per se – it “bleaches” the appearance, making it seem lighter. It really only can assist to make the appearance of mold seem less extensive, and only if the surface is cleaned of dirt and debris too.
  • ORGANIC MATERIALS AND BLEACH DON’T MIX: Wood is one of the favorite growing spots for mold. The bad news is that wood deactivates bleach rapidly, lessening its effectiveness.
  • THE OLDER THE BLEACH, THE LESS THE EFFECT: Chlorine bleach has a very short shelf life. This means that the older the bleach, the less its abilities. Now, we’re not just talking about “old” by sitting around your house for a couple of months. How long was it on the shelf in the hardware store in that plastic bottle, allowing its ions to escape all the while? One statistic is that there is a 50% reduction in power of a sealed bottle of bleach within 3 months. With the average warehouse stocking turnaround time being 6 months, your bleach isn’t packing much of a punch at all against mold…