You may blame pollen, ragweed, and seasonal allergies for your sneezing, watery eyes, runny nose, and tickle in your throat. But for many allergy sufferers, mold may be playing a bigger role than you realize – especially if you had a water leak from an ice dam this winter. Now that temperatures have warmed up, people are finding that mold is growing inside their walls and ceilings where the leak was. However, in addition to roof leaks, there are a number of sources of household mold and mildew that may be causing allergies.