That’s what the co-op board at 60 West Broad Street in Mt. Vernon learned when it tried to fix the building’s leaky facade. They’d long been aware of their water-infiltration problems, so in 2008, they forked over $758,000 for an overhaul of the front of their six-story building, says board member Maria Duarte. They hired an architect to draw up specs and DNA Contracting & Waterproofing to perform the work.     Read the article………………