What is yellow mold? (with photos)

Yellow mold is known to destroy wood.

Yellow mold is a fungus that normally grows in dark, damp places. There are several species of this mold, with some belonging to genera that are either toxic or widely known to destroy wood. It’s usually obvious when a building has a yellow mold infestation, because the mold’s color is often bright and hard to ignore. The color of this type of mold varies, however; for example, some may appear almost white and many are at least dyed white. Correctly identifying mold as a particular species is difficult and best left to a professional who can test it in a lab.

Yellow mold has a distinct bright yellow color and most of it is toxic.

One type of yellow mold is toxic and usually belongs to the genus Aspergillus, into which several hundred other mold species are categorized. Some of these fungi, including the toxic yellow variety, can be dangerous to humans and animals. If yellowish mold is found on a building, it must be handled with care and not touched without gloves or inspired. Excessive yellow mold with white fruit bodies growing from it is a sign that the affected area has been too wet for a long time. Freeing this mold from forming usually involves treating any leaks and drying out the moisture, or else the mold is likely to come back.

Yellow mold is a fungus that normally grows in damp, dark places.

Another mold that appears yellow is the Serpula lacrymans species, which is widely known as the house-eating mold because it is a fungus often responsible for dry rot. This mold tends to be dark yellow, almost golden, with white spores growing from it when conditions are right. As with most molds, heat and humidity are ideal for dry rot to grow. This type of mold was first documented in the early 1700s and has since helped or caused the deterioration of a large number of wooden buildings. Wooden furniture, whether indoors or outdoors, is also vulnerable to mold development and will eventually be destroyed if left untreated.

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A solution of bleach and water can be used to kill yellow mold.

Providing good ventilation, limiting humidity, and keeping adjacent areas clean can help prevent yellow mold growth. Mold cannot thrive without moisture, so ventilating an area well and taking care of leaks quickly is usually a good defensive strategy. Regular cleaning of the area can also prevent the growth of yellow mold, as well as kill unseen spores. Soap and warm water, diluted bleach, or certain commercial cleaning products are routinely used for these purposes.

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