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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.

In most cases, below 40 degrees Fahrenheit is too cold to replace a roof. The cold affects the shingles, making it more difficult to adhere them to your roof. It also becomes dangerous for contractors to get up on your roof in the cold weather, as there can be ice and slush causing surfaces to become slippery.

You may become so frustrated with the look of moss on your roof that you contemplate whether to clean or replace your roof. Fortunately, you don’t have to go as far as replacing it. After cleaning the moss, you can use a chemical solution to keep it away. For further protection, trim branches that overhang the roof, as fallen seed pods and leaves on the roof allow moisture to collect, encouraging moss growth. Consider adding zinc-coated flashing to the roof, too. As rain washes across the zinc, it leaves zinc particles behind that inhibit moss growth.

When it comes to choosing the best roof color for a blue exterior, you have plenty of options. For a classic neutral look, go with a light gray, dark gray, or black roof. Blend gray tones if you want a more eye-catching look for your roof, or go for a different splash of color with a green or even red. Take inspiration from your neighbors if you want your house to fit in on the block.