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A metal roof will last for an average of around 50 years—usually between 40 and 75 years—which is about double the lifespan of an asphalt roof—between 15 and 30 years or 25 years on average. Installing a metal roof is usually more expensive than an asphalt roof, with an average cost of $11,400 compared to the $9,200 for an asphalt roof. However, given that a metal roof costs about 20% more and lasts twice as long, it’s typically well worth the investment and should save you money in the long run.

The placement of snow guards depends on the individual roof, but typically snow guards are placed between 12 and 18 inches from the eaves, though they can be placed as close as six inches and as far as 24 inches from the eaves. A roofing professional can assess the roof and potential snow loads to determine the best placement.

A 26-gauge metal roof panel can span between 4 and 8 feet, depending on a few factors. Local building codes dictate what’s appropriate for panel span, but these are normally based on expected snow loads. Additionally, the type of metal roof you choose will affect the maximum span, as corrugated metal is stronger than flat standing seam panels or a screw down roof and can often span greater distances.

24-gauge metal is thicker and will stand up better to impact, so it’s a better option for roofs that will see heavy snow and ice accumulation, hail storms, fallen tree debris, and blown debris. It’s a more expensive option, but it’s worth the added cost for roof longevity in extreme climates. If you live in a more moderate climate and don’t have trees overhanging your roof, 26-gauge metal is suitable and is a more affordable option.