The theory that a metal roof is “noisy” stems from the memory of a barn, or a patio awning, where there is nothing between an individual and the roof, except air.
A study was conducted by The Acoustic Group at the University of Luleå, Sweden, to determine the amount of sound emitted when rain falls on various roofing materials. The study concluded that metal did not register a significantly higher sound level than conventional asphalt shingles.
The variation of sound pressure, as it relates to rain falling on a metal roof, is dependent upon various factors. The most important factor relates to the method of construction.
A metal roof installed over open framing will register a louder sound than panels that are installed over a solid roof deck. The roof deck literally absorbs or muffles the sound. It is with few exceptions that most steep slope metal roofing products on the market today are installed with some form of decking and underlayment material that absorbs sound. In addition, most homes are constructed with an attic space that includes insulation at the ceiling level, this further absorbs any sound.
Further, in a re-roof application, metal is often installed over an existing layer of shingles. Considering the multiple layers of shingles, roof deck, attic air space and the insulation above the ceiling, individuals who have metal roofs say they hear the rain on their skylights, not their metal roof.
10 сен 2024
