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Metal roofs have a reputation for being noisy, but with proper installation and adequate insulation, they are not significantly noisier than shingle roofs. The type of metal used can affect the sound level; for instance, steel roofs are typically noisier than slate or asphalt tiles but quieter than aluminum. While some people find the sound of rain on a metal roof pleasant, you can take steps to reduce the noise. Installing a thicker underlayment, adding insulation between the roof and the house, or using acoustic tiles can effectively muffle the sound. The gauge (thickness) of the metal roofing can also contribute to sound dampening.

Stripping existing shingles and installing a new shingle roof takes a professional one to two days, and sometimes up to three days for larger roofs. Additional safety measures necessary for steep roofs can extend the timeframe even further, as do added measures, like replacing roof decking or reinforcing your roof structure to support heavier materials like slate or clay.

The principal, common, and auxiliary rafters are the most frequently used types of rafters. Principal rafters are large and typically appear toward the edges of the roof. Common rafters are smaller than principal rafters. Some people may use a mix of common and principal rafters. The auxiliary rafter is not common, but it provides extra reinforcement for a principal rafter on a large building.

In most cases, installing solar panels will not void your roof warranty. To keep roof warranties intact, check your written warranty or call the manufacturer to ask about clauses regarding roof penetrations. You can also protect yourself by getting written approval or a modified warranty that specifically allows the solar installation type you’re planning. Then, hire a professional solar installer that follows roofing manufacturer instructions and protects the roof during installation.