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Metal roofs do not inherently leak more than shingle roofs; when properly installed, they are generally less likely to leak. Asphalt shingle roofs are more susceptible to leaks due to factors like wind uplift, damage from extreme weather, moss growth, and ice dams. Over time, asphalt shingles also lose their protective grit, which reduces their waterproofing capabilities. In contrast, metal is a more resilient material that stands up better to heavy precipitation and high winds. However, metal roofs can develop leaks if they are poorly installed, have improperly sealed fasteners, or experience issues from thermal expansion. For this reason, professional installation and regular maintenance are crucial to ensure a metal roof's longevity and superior protection against leaks.

Generally, hailstones that are one inch in diameter or larger can cause significant damage to a roof. However, smaller hail can also cause damage, particularly when accompanied by strong winds, if it strikes an aging or poorly maintained roof, or if hailstorms are frequent in your area. Hail that is ¼ inch (pea-sized) or smaller poses a minimal risk of immediate, permanent damage, but cumulative impacts can cause deterioration over time. The extent of the damage also depends on the roofing material; hail-resistant tiles like slate or certain types of asphalt shingles can withstand impacts better than other materials. If you are concerned about potential damage after a storm, it is always a good idea to have a professional roofer conduct an inspection.

Asphalt shingles blister when air gets trapped between building materials, either within the layers of the shingle itself or in adhesives on the undersides of the shingles. As the roof heats up in direct sunlight, the trapped gas expands and creates a bubble in the roof. Eventually, the bubble can pop, leaving an exposed area of decking and underlayment.

If your roof has a vapor barrier, you will need approximately one square foot of roof vent for every 300 square feet of ceiling space. If there is no vapor barrier, the roof should have one square foot of roof vent for every 150 square feet of ceiling space. If you are not comfortable making this determination, a local roofing professional can help.