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Whether or not an annual snow removal contract is worth it depends mainly on location. If you live in an area with frequent heavy snowfall, a yearly contract could be better than paying per clearing. If you live in an area where it only snows a few times a year, paying per snowstorm may be a better option.

Heavy amounts of snow could be a problem. In many climates, lots of snow on your rooftop can lead to freeze-thaw cycle that create ice dams, which can damage rooftops. But if you’re using shingle clips, this snow poses an additional problem: As it melts and freezes, it can easily dislodge clips you’ve placed on your roof.

You can clean snow off your roof after a fresh snowfall while it’s still lightweight, but brushing off snow can also dislodge your clips. If you get a lot of snow, then roof clips become less viable.

Most roofs can take quite a bit of weight from snow, but their ability to handle heavy snow is not unlimited. Most roofs can handle about 20 pounds per cubic foot of fresh snow. Ice, ice dams, and other factors can contribute to dangerous roof weight. Newer roofs, sloped roofs, and those that have more support can hold more snow than older roofs, flat roofs, and roofs with widely spaced beams. To figure out how much snow your roof can hold, you will need to contact a professional roofing contractor to calculate the maximum snow load for your specific roof.

When starting the engine, you typically leave the choke on a snowblower in the "choke" or "closed" position. After starting, let the engine run for a few minutes to warm up. Then, gradually open the choke, moving it to the "open" or "run" position, allowing more air into the engine and transitioning to a normal fuel-air mixture. The exact duration varies based on the snowblower model and ambient temperature, but as a general rule, you should open the choke once the engine has stabilized and runs smoothly, typically within a few minutes.