Michael Rubino was a featured expert in an article at Best LIfe to discuss the difference between mold and mildew.
You may have heard the terms mildew and mold used interchangeably, but they're not the same thing. Let us clear things up once and for all: While mold and mildew both are types of fungi that thrive in moist areas (and that you want to get rid of as fast as possible), mildew is actually a variety of mold. It isn't necessarily more harmful, but it does look different.
"The term mildew basically refers to mold growth that's light in color and powdery in texture," says Michael Rubino, a mold and air quality expert and the founder of HomeCleanse. "These mold colonies could be gray, white, or light green and grow in a flat format without much height, meaning they aren't as fluffy and spongelike as some other mold growth."
Other types of mold growth that aren't mildew can look like a black stain or show up as specks of black, white, orange, green, or brown.
Read the full article here: https://www.housebeautiful.com/lifestyle/cleaning-tips/a43941198/mildew-vs-mold/