A roof's ability to handle snow depends on its strength and the snow's weight, as wet snow is much heavier than dry, fluffy snow. While designs in snowy regions often allow for 35 to 50 pounds per square foot, a general guideline is that a typical roof can withstand about four feet of fresh snow, two feet of packed snow, or just one inch of ice. Factors like the roof's age, slope, and support structure also affect its capacity; newer, sloped roofs generally hold more weight than older, flat ones. Ice and ice dams add significant, dangerous weight. Because capacity varies, it is best to contact a professional roofing contractor or the original builder to determine the maximum snow load for your specific home.

Asking questions before hiring a roofer ensures you receive the best quality for your investment upfront and in the long term. Roofers with minimal experience, unfamiliar with local building codes, or minimal access to great materials can lead to both structural and financial problems down the line. You should also be able to easily communicate and collaborate with your roofer during extensive projects.

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.

When choosing a roofer to install a green roof, look for someone with experience who specializes in green roofs. Rather than looking for a standard roofing contractor, you'll want to find a company that specifically offers green roofs. That company will have people on staff, such as a landscape architect, who understand the types of plants that thrive on rooftops.