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The proper specifications for furring strips can vary, so you should always consult the roofing manufacturer's guidelines or your roofer. However, general recommendations are as follows:

• Thickness: Furring strips are typically 1 to 1-1/2 inches thick, meaning standard 1-by or 2-by lumber works well. In areas with extreme winds, a thinner strip may be preferred to limit how much air can get under the roof and cause uplift. A thicker strip can add slightly more insulation but will also increase installation costs.

• Spacing: The recommended spacing for furring strips is between 12 and 24 inches apart on center. Proper spacing is crucial for ensuring good airflow, adequate drainage, noise reduction, and better energy efficiency. The ideal spacing can depend on the roof's pitch and the specific type of metal roofing being installed.

When installed and maintained properly, a cedar shake roof should last up to 60 years. Severe weather and high winds will damage your roof, reducing its life span. Expect a shorter life span if the roofer didn't use top-grade material, didn’t have cedar shake expertise, didn’t create the proper ventilation, or didn’t use the correct fasteners. Keeping up with maintenance will help it last longer. It’s also a good idea to get roof inspections on a regular basis to help spot repairs before they become major issues.

Shingle damage comes in many forms, and the damage usually depends on the wind speed and the shape of the roof before the winds. Typically, when shingles are damaged by wind, they become torn, creased, or detached from the roof. Some might go missing entirely. More extensive roof damage might occur if a tree branch or other debris has fallen onto the roof as a result of the windstorm.

A metal roof can last anywhere from 15 to over 100 years, with an average of 50 years, depending on the material, installation, and environment. The specific metal is a key factor: aluminum roofs may last 20 to 45 years, while steel can last 30 to 60 years. Tin can last for up to 75 years, and more durable options like zinc, stainless steel, and copper can last from 80 to over 100 years. Factors that can shorten a metal roof's lifespan include living in a coastal region with corrosive salt air, improper installation (such as laying over old shingles), and failing to inspect and replace fasteners, which may wear out before the panels.