Summary: Once again, we have the Crackman answering listener email. George in Waltham MA writes: "I've recently discovered a white fuzzy substance on my basement foundation walls. What in the world could it be?"
Summary: Once again, we have the Crackman answering listener email. George in Waltham MA writes: "I've recently discovered a white fuzzy substance on my basement foundation walls. What in the world could it be?"