Fact: No, metal roofs are not noisy in the rain. The key to noise reduction is preventing sounds from hitting hard, flat surfaces. The thicker the coating and the more irregular the surface texture, the more effective a roof is at disrupting and dampening the reverberation of sound waves. DECRA stone-coated metal roofing products are peacefully quiet in the rain, due to their intricate textures and sound-absorbing cushion of roofing granules.