"Why do bricks need to breathe?" - Because bricks and mortar aren't waterproof. "So what happens if my bricks don't breathe?" - There is a greater chance for you to have moisture problems with your home or building. "What kind of problems?"
BrickVent products take care of moisture and water vapor in brick and masonry every day. The principles of how the product works are similar to other simple inventions we use every day that we just kind of take for granted without giving