When small black spots start to appear on tile and walls, you know you have a problem: mildew. This stubborn fungus that loves to colonize dark and damp places can cause serious damage to your home.
As the fungus expands and gets thicker, it manages to make its way underneath the shingles, for example. Sooner than you expect, the wood will rot, causing your roof to leak. Fixing a leak in the roof will be an unnecessary expense that could have been avoided if you had not allowed the mildew to grow. Not to mention the fact that inhaling these microscopic spores is bad for your health.