You might be able to see mold in your home, growing on walls, floors, carpet, ceilings or bathroom fixtures. However, mold often grows in places where it cannot be easily seen, like under carpets, inside walls and inside heating, ventilation and air conditioning ducts. You should suspect mold if your home has a musty smell. You should also know that mold is likely if you’ve had flooding or a water leak in your home. To find out for sure if there’s mold in your home, you need to call in a certified mold tester. Most certified mold testers are engineers and are trained to locate mold even in hard-to-see places. They can let you know if there is mold in your home and if so, what type of mold it is.