According the the Metal Roofing Alliance, the answer is a definitive no. PORTLAND, Ore.—It’s a common debate as the peak rainy season approaches, especially among homeowners as they consider re-roofing projects this spring: Are metal roofs loud on rainy days, and if they are, is that a pro or a con? “Homeowners typically fall into one of two camps—they either want to hear the patter of rain on their roof,…