What Makes Mold Start to Grow in the Home?


The number one factor contributing to mold growth is moisture. Without elevated humidity or direct moisture content, mold will go dormant and will not grow. However, as soon as it touches that extra moisture or comes in a human environment, it springs back to life. So the most important takeaway for any property owner in that case is that if you notice any kind of elevated humidity levels or moisture in your property, address it right away. Don’t sit back and wait. Don’t wait to make decisions based on the fact that they may cost you money to deal with. I can guarantee you that if mold starts growing, the costs will get exponentially higher. Jump on it immediately.


Other factors that affect mold growth include the fact that there has to be a food source for mold. It won’t grow unless there’s something for it to eat. Now we know that mold is saprophytic. It eats dead organic material, and our homes are filled with dead organic material. So it’s not hard for it to find a food source to eat.

Other factors include the fact that it does take some time. It doesn’t grow immediately, but it does grow quickly. We find that it’ll start growing usually in about 24 to 72 hours, depending on the conditions. Other conditions and factors include how much air movement there is, how much light there is, and what the temperature is. The ideal condition for mold to grow is in a dark, damp area with not a lot of air movement. You’ve got the food source. You have the mold present. You have the moisture present. It’s dark, it’s damp, it’s going to grow very quickly.

Now when we go into a standard water loss, a lot of times we’ll go in there and the property’s only been sitting there for a couple of days. But as soon as we pull back those baseboards, we notice a lot of mold growth. The reason why is because that is the ideal situation. The food source is the back of the baseboard because it’s not painted over, it’s a raw wood surface. It’s dark, it’s humid in the air, it’s damp. It has its food source, it has the mold present, it has the moisture and it begins growing very, very quickly.


So, remember our number one takeaway. Address moisture immediately. Stop the damage from getting worse, and if you need professional help or you want to inquire with Lightning Restoration when it comes to mold removal, water damage, or fire damage, please give us a call. You can reach us at 855-850-LTNG, or you can leave us a message. Be safe out there.

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